New Circuits Page 130
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The following circuit shows about Alarms Police / Ambulance electronic Diagram Design. Features: simple and easy to assemble, Cheap circuit, ....
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On many cars, the boot light will not go out until the lid is properly closed. It is all too easy when unloading the car, to leave the lid ajar. If you are unlucky and the car remains unused for some time, the next time you try to start it, the lamp will....
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The frequency formula of 555 oscillator is popularly known. For a known resistors and capacitor, the frequency can be determined by a formula. From the math...
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For the full bridge inverter circuit i planned to use IRF2807 (75V Vds, 82A Ids) and Two IR2110 for the driver. I never use IR2110 before and failed many time when i want to make a H-Bridge for DC motor last year. My DC input voltage is 34V (2 series solar....
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Every key pad button generates 5 bit binary code and IC1 sends this code to the IR leds through D1 and D2 diodes. Code is shaped from 6 pulses with 5 gaps. Pulse position modulation PPM technique is used for transferring data. Data information occurs at....
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This is high quality Preamplifier circuit with built-in USB DAC for my power amplifier Leachamp. Schematics is from datasheet of PCM2902. Circuit includes DAC and ADC, SPDIF output and input and HID part with 3 buttons for MUTE, VOL + and VOL-. For high....
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After getting some Micro Scalextric for Christmas and shortly after acquiring a vast mount of second-hand track from eBay I decided I needed a lap counter so I could race against the clock with opponents. I didn`t just want to see who could do 10 laps first....
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We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
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Cooking with Induction Heating Technology Induction heating is a well-known technology and very commonly used for cooking appliances because of its high energy efficiency. The single ended....
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current during under-voltage lockout (UVLO). When VCC exceeds the UVLO+ threshold, the IR2156 BR>begins to oscillate and the Charge Pump circuit (CCP, DCP1, and DCP2) supplies the current to VCC ..
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This the fm wireless transmitter circuit, the truth is one kind microphone that developed to be used without a cable from the microphone to the amplifier. Makes....
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Lego rotation sensor is a nice little device that enables RCX to measure rotation of an axle with good resolution: 16 steps per turn. Unfortunately it is plagued with a problem: at low rotation speed value read seems to jump randomly from 1 or two units. So....
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The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is determined by the formula VOUT= l. 25 (1+R2/R1). I chose a 10-k © resistor for R1 and a 100-k © resistor for R2 to allow for a little wasted current flow (around....
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This is the type that has a little DC motor fan positioned above a small container containing a deoderant liquid or jelly, and runs off a D cell. The photocell turns off the fan when it gets dark. The LED flashes if the battery is good...
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This H-bridge i`m using now for my Sumo-bot ( This H-bridge )I think is fairly good for medium size motors ( untill 30A peak and 13 A continuous mode). The price is arround $75 plus sending. We start talking about what is a "H-bridge". One H-bridge is a....
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All the mods were sourced through the Mssiah forum, so thanks to all for sharing. I`ve tried to credit all those responsible, and to help anyone else wanted to do the same I`ve also added a few photos of my build. RCA soldered to GND and rearside of....
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The circuit shown here works from 24V DC and can flash two 24V bulbs alternatively. The circuit is nothing but an astable multivibrator operating at 1Hz and 50% duty cycle. The lamp to be flashed is connected in place of the collector resistor (Rc) of a....
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First I tried connecting the circuit to a 9V battery. (Multimeter reads around 8. 3 Volts, which is in the operating voltage range of the LM386 as per datasheet) The result I have is lots of noise, sometimes cracks and pops and a barely audible sound of the....
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In the silicon-controlled trigger circuit, cadmium sulfide cell connects the relaxation oscillator before having a sensor to blink in darkroom. That make the speaker emit the warning sound of Ka, Li. The rate of the sound will increase with the quantity of....
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Here is a collection of (SMPS) schematic, datasheets, images and tips for switch mode power supplies using TL494/ LM339, KA7500 and IC2003....
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Application High Power LED Driver SP7652 with Analog 0V-to-10Vdimmer Electrical Requirements: Input Voltage 5. 5V to 28V Output Voltage VF of LED Output Current 0 to 6A Circuit This circuit has been designed to provide a high output constant current source....
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The IC we will use to measure the temperature is the TMP36 IC. We will integrate this with the arduino to measure the temperature. The arduino will then read this measured value from the TMP36 and translate into degrees fahrenheit which we will be able to....
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Hi all, I am very new to this forum as well as DIY electronic circuits. I am not an electrical engineering student nor I have sufficient background (I ....
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If you need a tool to save electricity you use, so in this article a simple power saving device circuit diagram is very suitable for you to test. Basically, this tool can really save electricity in your home from 10-25%. Work of this tool is simply to reduce....
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This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games. With SW1 positioned as shown in the circuit diagram it reproduces the typical dual tone sound of....
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Basic circuit of using L293 formsan H-Bridge Driver is shown in Figure 1. As shown for such inductive loadas DC motor, external diodes for suppressing back EMF must be connected. The MiniBoard uses L293D instead, the L293D has internal diodes,....
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In this file is a schematic for a simple wiretap & instructions for hooking up a small tape recorder control relay to the phone line. First, I will discuss taps a little. There are many different types of taps. There are transmitters, wired taps, and....
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Controller for Hybrid Power Plant block diagram of the HPP, comprised of 440 Wp photovoltaic modules, 1 kW wind turbine and 5 kW diesel engine as a back-up. HPP is a centralized PV and wind power generation plant, using battery to store the produced dc....
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A simple 2 Transformer, 4 Germanium Diode Ring Modulator with a true bypass switching scheme. Includes input for Carrier Wave modulation. Power is only required for the status LED...
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Hi guys I have recovered these beautiful valves from an old television destined to scrap. From this I have saved the 6CU6 (h.deflection) and a double....
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A shift register works by shifting data to the right with each clock pulse. Regardless of if the data is loaded in all at once via parallel load or one bit at a time via serial input. Each clock pulse shifts data into the first flip flop, the data that was....
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The large-scale LED display system adopts the line by line scan and lists the driving means to save the expenses of hardware, it adopt 1/16 it is non-interlaced scanning mode, LED display screens large-scales whole it last 16 pieces all right. The picture,....
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Circuits that use a temperature compensating resistor have a small error because the tempco`s resistance is a function of temperature T, rather than 1/T as is theoretically perfect. The fact that tempco circuits are de-riguer attests that this remaining....
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Electronics Tutorial about Mesh Current Analysis and Mesh Analysis Examples used to Analyse Complex Electrical Circuits in DC Theory....
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The following circuit shows about Circuit an Infrared Toy Car Motor Controller. This circuit based on the 4047 and4017 IC. Features: 16V ....
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Although it does not have the same charm as real mercury barometers with long glass tubes on pieces of carved and polished wood, the Torricelli barometer discussed here is a functional equivalent and electronic replica of the Torricelli barometer. Actually,....
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The circuit shows one way of obtaining a voltage of 90V from a 1. 5V battery supply. The LT1073 switching regulator from Linear Technology ( operates in boost mode and can work with an input voltage as low as 1. 0 V. The switching transistor, which is hidden....
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The Boss SD-1 Super OverDrive is a pedal with a simple design, using only one dual operational amplifier (uPC4558C) and 6 transistors, with an asymmetric overdrive circuitry for a classic, natural tube amp growl. It generates the warm distortion of an....
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When ever you need to get an alarm or intimation after ten minutes, the circuit shown below can be used. The circuit is nothing but a monostable multivibrator based on IC NE 555. When ever you press the reset push button the green LED D1 glows after 10....
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The robot was controlled with a Motorola 68HC11 on a special MC11 input/output board furnished by the Stanford Smart Product Design Lab (SPDL). The SPDL also furninshed motor controller boards, each consisting of a DS3658 stepper controller, a SN754410....
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The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the sound card to use a common....
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A basic UUS 65 73 MHz fm transmitter circuit schematic which can be used as UUS oscillator with no explanation 65 - 73 MHz transmitter ( oscillator ) c....
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How many speaker attach with this amplifier and what is the what is the speaker Ohom and watt valu of this speaker plz ans me my email Sir, you made this amp and reallly properlly works this amp to used life time. Which transfarmer used for 2 channals .....
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Sine wave oscillator can be implemented using Wien-Bridge oscillator like in our previous sine wave oscillator circuit, but now we present another method of...
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When listening to music at low volume levels, bass and treble frequencies are attenuated more than mid frequencies. This loudness control alters the frequency response curve to correspond roughly with the equal loudness characteristic of the ear. The circuit....
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I have a NOS lathe with NO history. Period. I think it was maybe purpose-built. In any case, I mention it because there is really no "tech-support....
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This system is a Drag Race timing system centered around a micro-controller. The system consists of the Christmas Tree (the three yellows, the green and red lights), the fault sensor (checks to see if a racer started racing before the green light), the....
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This is a simple 1. 5V powered LED Flasher circuit diagram. This circuit can flash 1. 7V or 2. 3V LED (depend on the color) using 1. 5Vdc input. The LED will turn on when the 100u capacitor jacked up by the collector of BC557. The circuit is a charge-pump....
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A circuit diagram that can be used for the generation of CW Morse code is shown here. This circuit can be very useful those who would like practice Ham Radio. The circuit is nothing but an astable multivibrator based on NE 555. The frequency of oscillations....
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Uses probe containing Clairex 905HN light-dependent resistance element, connected to DC differential amplifier driving meter having specially calibrated scale. Article gives calibration procedure. Switching circuit provides constant check on voltage of 22.....
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This is the pulse width (time) / voltage conversion circuit, according to the diagram component parameters, it can convert 0. 1 S pulse width into 10V output voltage. When time pulse input end is added input conversion pulse, the analog switch Sl is....
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A way to boost the wattage of my small scale Tesla coil. I`m not getting good wattage going coming off the secondary. I`m not sure what the current or voltage is but from what i can tell is that the coils are resonant and that the output is like 100kv at....
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Model aircraft pilots like to use PC-flight-simulator software to train the handling of model aircraft without the risk of the loss of real models. It makes sense to use the own model aircraft remote control (RC) as input devise for the software. This....
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This circuit is a mini bicycle bell. Mini bicycle bell is connected using the bell as a switch. If the button is pressed, an electric current flowing on the 9V voltage electronic circuit through the transistor Q1. because the speakers are connected to the....
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If you feel that somebody is tampering with your telephone line you might find this little circuit useful. It detects if there is another telephone connected to the line, if there is a short or an open line. Sound and a flashing light will tell you which is....
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Hello how can find the output of capacitor microphone in theory or augur it without test in? for example in these circuits what is the output of each....
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A LED to indicate when a DC voltage reaches 5 volts or more. I don`t want the LED to be dim when it is at 4. 5 or anything. I just want it to be full bright at 5, 0 bright at anything below 5. Is there a way I can do this with discrete components (no IC`s,....
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Analog baseband digital circuit table of contents:, Emi interface, BPI bus, Jtag, LCD interface, keypad, UART, mint, Gpio, and Mcp keypad, audio, RF, I/O connectorPower cones, serial time, battery charging and analog, Led driver, RF control, Jtag, iota,....
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Integrated circuit input side has a oscillating circuit,it`s oscillation frequency depends on external components L1, C1 and sensor`s equivalent capacitance, the latter size increases with liquid immersion. Oscillating signal add on the threshold switch....
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Electronics Tutorial about DC Motors, Electrical Motors and Stepper Motors used as Actuators including PWM and Transistor H-bridge Motor Control....
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This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1. When the....
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This simple circuit will energize and de-energize a relay at the push of a button. Any type of momentary action push-to-make switch can be used. Pushing the button once - will energize the relay. And pushing it a second time - will de-energize the relay.....
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Many microcontrollers or PICs will have uncommitted digital-to-analog converter (DAC) outputs that can be used to generate sine waves. But these are generally low resolution (8 to 10 bits), yielding a total harmonic distortion (THD) in the 1% range. Or,....
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This is the first circuit I created. Working principles are described in the "Basic Info" page. The transistor connected to the led isn`t really necessary, but I prefer using it to get maximum power. The Pushbutton SW1 is placed between the battery and the....
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A bidirectional H bridge DC motor control circuit is shown here. The circuit is based on the IC L298 from ST Microelectronics. L298 is a dual full bridge driver that has a wide operating voltage range and can handle load currents up to 3A. The IC also....
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This simple logic probe has both LEDs on with no signal at the input but due to the nor gates connected to the probe, indicates correctly when a high or low signal is present. It also works correctly for pulse trains. Normally both LEDs are forward biased....
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The LV2282VA is an FM Transmitter IC. MPX block makes stereo modulated, composite signal from L and R sound inputs. RF VCO include FM modulation function. Audio AGC function keeps FM modulation well regulated. PLL 2 synthesizer determines RF output frequency....
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This intercom circuit suitable for accompanying door bell. This circuit uses the speakers both as microphones and as loudspeaker. This intercom is made....
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The information here is primarily intended for home brewers that want to build the analyzer or want to design their own based on the principles of the design. It is not intended for use in commercial applications ! If you want to build the analyser a warning....
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THE circuit shown provides a smooth, piercing, wailing siren with a minimum of components. Not only this, but three spare gates of hex inverter IC1 remain, which means that a true cacophony could be created by running two sirens off the same i. c. Gate IC1a....
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Using the LTC4060 integrated circuit, can be designed a very simple smart NiMH battery charger electronic project. This electronic charger circuit project is a complete fast charging system for NiMH or NiCd batteries. This NiMH battery charger circuit....
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Here is a schematic diagram of electret microphone pre-amplifier using LMV721 op-amp. because the LMV721 has low noise and low power features, it would be an...
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This easy as well as cheap but effective device is mainly intended for your ease to leave your fish autofed. You need no longer worry your fish would starve as this autofeeder would replace your job. This autofeeder device will expell pellets by quantity as....
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This is a project for a versatile, digital signal processor (DSP) based generic driver and controller circuit for Solid State Tesla Coils (SSTCs). Support for all new topologies (DRSSTC, OLTC, PLL-SSTC, . ) can be implemented programmatically. The same....
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The MCU is ATMEL 89C4051 CMOS Microcontroller having 4kB code memory, 128 bytes On-chip RAM and 8-bit Port1 and Port3. The A/D chip is HARRIS CA3162, 3-digit DVM. The A/D converter employs dual-slope integrator providing 10Hz sampling rate. Digital output....
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The solenoid requires a certain amount of current to generate its magnetic field. If the solenoid was a perfect inductor, the DC current would rise above all means and would most likely damage other circuit components. However, solenoids inherently have a....
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The CGS89 is a sequencer designed for delivering pulsed or gated events, for rhythm and percussion, triggering other sequencers, or selecting stages in Programmers such as the Serge R15 PRG. It can be used as a replacement for the first generation Serge R10....
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It can change the frequency range, and the oscillating signal is adjusted by potentiometer RP1. Since the output resistance is very low ( 1K ©), it issuitable for various kinds of control circuit as a source. In the circuit, the transistor`s collector....
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Magnets with a very long coil wound around transform the vibrations of strings into an electric signal. (We are talking about "magnetic" pickups, not "piezo" pickups. ) In 1 Volume/2 Tone or 1 Volume/1 Tone types, the pickups` hot wires go to the selector....
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The first circuit, shown below, tests saturated turn-on time, while the second circuit tests saturated turn-off time for a 2N2222 transistor. Note that the first circuit schematic takes the output from the collector, which is pulled high to Vcc. While the....
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The saving lamp circuit has the glass cover type and exposed type. Glass cover types have three series of spherical, cylindrical ball, processing type, etc. , the first two series have completely four types of transparent, carving, engraving and white color.....
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No fire replaced ignitor still no fire checked for voltage to valve assy none checked safety switches on fire box & vent normally closed condition okayhow do I check the centrifical switch & pressure switch for proper operation....
The following circuit shows about Alarms Police / Ambulance electronic Diagram Design. Features: simple and easy to assemble, Cheap circuit, ....
On many cars, the boot light will not go out until the lid is properly closed. It is all too easy when unloading the car, to leave the lid ajar. If you are unlucky and the car remains unused for some time, the next time you try to start it, the lamp will....
The frequency formula of 555 oscillator is popularly known. For a known resistors and capacitor, the frequency can be determined by a formula. From the math...
For the full bridge inverter circuit i planned to use IRF2807 (75V Vds, 82A Ids) and Two IR2110 for the driver. I never use IR2110 before and failed many time when i want to make a H-Bridge for DC motor last year. My DC input voltage is 34V (2 series solar....
Every key pad button generates 5 bit binary code and IC1 sends this code to the IR leds through D1 and D2 diodes. Code is shaped from 6 pulses with 5 gaps. Pulse position modulation PPM technique is used for transferring data. Data information occurs at....
This is high quality Preamplifier circuit with built-in USB DAC for my power amplifier Leachamp. Schematics is from datasheet of PCM2902. Circuit includes DAC and ADC, SPDIF output and input and HID part with 3 buttons for MUTE, VOL + and VOL-. For high....
After getting some Micro Scalextric for Christmas and shortly after acquiring a vast mount of second-hand track from eBay I decided I needed a lap counter so I could race against the clock with opponents. I didn`t just want to see who could do 10 laps first....
We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
Cooking with Induction Heating Technology Induction heating is a well-known technology and very commonly used for cooking appliances because of its high energy efficiency. The single ended....
current during under-voltage lockout (UVLO). When VCC exceeds the UVLO+ threshold, the IR2156 BR>begins to oscillate and the Charge Pump circuit (CCP, DCP1, and DCP2) supplies the current to VCC ..
This the fm wireless transmitter circuit, the truth is one kind microphone that developed to be used without a cable from the microphone to the amplifier. Makes....
Lego rotation sensor is a nice little device that enables RCX to measure rotation of an axle with good resolution: 16 steps per turn. Unfortunately it is plagued with a problem: at low rotation speed value read seems to jump randomly from 1 or two units. So....
The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is determined by the formula VOUT= l. 25 (1+R2/R1). I chose a 10-k © resistor for R1 and a 100-k © resistor for R2 to allow for a little wasted current flow (around....
This is the type that has a little DC motor fan positioned above a small container containing a deoderant liquid or jelly, and runs off a D cell. The photocell turns off the fan when it gets dark. The LED flashes if the battery is good...
This H-bridge i`m using now for my Sumo-bot ( This H-bridge )I think is fairly good for medium size motors ( untill 30A peak and 13 A continuous mode). The price is arround $75 plus sending. We start talking about what is a "H-bridge". One H-bridge is a....
All the mods were sourced through the Mssiah forum, so thanks to all for sharing. I`ve tried to credit all those responsible, and to help anyone else wanted to do the same I`ve also added a few photos of my build. RCA soldered to GND and rearside of....
The circuit shown here works from 24V DC and can flash two 24V bulbs alternatively. The circuit is nothing but an astable multivibrator operating at 1Hz and 50% duty cycle. The lamp to be flashed is connected in place of the collector resistor (Rc) of a....
First I tried connecting the circuit to a 9V battery. (Multimeter reads around 8. 3 Volts, which is in the operating voltage range of the LM386 as per datasheet) The result I have is lots of noise, sometimes cracks and pops and a barely audible sound of the....
In the silicon-controlled trigger circuit, cadmium sulfide cell connects the relaxation oscillator before having a sensor to blink in darkroom. That make the speaker emit the warning sound of Ka, Li. The rate of the sound will increase with the quantity of....
Here is a collection of (SMPS) schematic, datasheets, images and tips for switch mode power supplies using TL494/ LM339, KA7500 and IC2003....
Application High Power LED Driver SP7652 with Analog 0V-to-10Vdimmer Electrical Requirements: Input Voltage 5. 5V to 28V Output Voltage VF of LED Output Current 0 to 6A Circuit This circuit has been designed to provide a high output constant current source....
The IC we will use to measure the temperature is the TMP36 IC. We will integrate this with the arduino to measure the temperature. The arduino will then read this measured value from the TMP36 and translate into degrees fahrenheit which we will be able to....
Hi all, I am very new to this forum as well as DIY electronic circuits. I am not an electrical engineering student nor I have sufficient background (I ....
If you need a tool to save electricity you use, so in this article a simple power saving device circuit diagram is very suitable for you to test. Basically, this tool can really save electricity in your home from 10-25%. Work of this tool is simply to reduce....
This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games. With SW1 positioned as shown in the circuit diagram it reproduces the typical dual tone sound of....
Basic circuit of using L293 formsan H-Bridge Driver is shown in Figure 1. As shown for such inductive loadas DC motor, external diodes for suppressing back EMF must be connected. The MiniBoard uses L293D instead, the L293D has internal diodes,....
In this file is a schematic for a simple wiretap & instructions for hooking up a small tape recorder control relay to the phone line. First, I will discuss taps a little. There are many different types of taps. There are transmitters, wired taps, and....
Controller for Hybrid Power Plant block diagram of the HPP, comprised of 440 Wp photovoltaic modules, 1 kW wind turbine and 5 kW diesel engine as a back-up. HPP is a centralized PV and wind power generation plant, using battery to store the produced dc....
A simple 2 Transformer, 4 Germanium Diode Ring Modulator with a true bypass switching scheme. Includes input for Carrier Wave modulation. Power is only required for the status LED...
Hi guys I have recovered these beautiful valves from an old television destined to scrap. From this I have saved the 6CU6 (h.deflection) and a double....
A shift register works by shifting data to the right with each clock pulse. Regardless of if the data is loaded in all at once via parallel load or one bit at a time via serial input. Each clock pulse shifts data into the first flip flop, the data that was....
The large-scale LED display system adopts the line by line scan and lists the driving means to save the expenses of hardware, it adopt 1/16 it is non-interlaced scanning mode, LED display screens large-scales whole it last 16 pieces all right. The picture,....
Circuits that use a temperature compensating resistor have a small error because the tempco`s resistance is a function of temperature T, rather than 1/T as is theoretically perfect. The fact that tempco circuits are de-riguer attests that this remaining....
Electronics Tutorial about Mesh Current Analysis and Mesh Analysis Examples used to Analyse Complex Electrical Circuits in DC Theory....
The following circuit shows about Circuit an Infrared Toy Car Motor Controller. This circuit based on the 4047 and4017 IC. Features: 16V ....
Although it does not have the same charm as real mercury barometers with long glass tubes on pieces of carved and polished wood, the Torricelli barometer discussed here is a functional equivalent and electronic replica of the Torricelli barometer. Actually,....
The circuit shows one way of obtaining a voltage of 90V from a 1. 5V battery supply. The LT1073 switching regulator from Linear Technology ( operates in boost mode and can work with an input voltage as low as 1. 0 V. The switching transistor, which is hidden....
The Boss SD-1 Super OverDrive is a pedal with a simple design, using only one dual operational amplifier (uPC4558C) and 6 transistors, with an asymmetric overdrive circuitry for a classic, natural tube amp growl. It generates the warm distortion of an....
When ever you need to get an alarm or intimation after ten minutes, the circuit shown below can be used. The circuit is nothing but a monostable multivibrator based on IC NE 555. When ever you press the reset push button the green LED D1 glows after 10....
The robot was controlled with a Motorola 68HC11 on a special MC11 input/output board furnished by the Stanford Smart Product Design Lab (SPDL). The SPDL also furninshed motor controller boards, each consisting of a DS3658 stepper controller, a SN754410....
The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the sound card to use a common....
A basic UUS 65 73 MHz fm transmitter circuit schematic which can be used as UUS oscillator with no explanation 65 - 73 MHz transmitter ( oscillator ) c....
How many speaker attach with this amplifier and what is the what is the speaker Ohom and watt valu of this speaker plz ans me my email Sir, you made this amp and reallly properlly works this amp to used life time. Which transfarmer used for 2 channals .....
Sine wave oscillator can be implemented using Wien-Bridge oscillator like in our previous sine wave oscillator circuit, but now we present another method of...
When listening to music at low volume levels, bass and treble frequencies are attenuated more than mid frequencies. This loudness control alters the frequency response curve to correspond roughly with the equal loudness characteristic of the ear. The circuit....
I have a NOS lathe with NO history. Period. I think it was maybe purpose-built. In any case, I mention it because there is really no "tech-support....
This system is a Drag Race timing system centered around a micro-controller. The system consists of the Christmas Tree (the three yellows, the green and red lights), the fault sensor (checks to see if a racer started racing before the green light), the....
This is a simple 1. 5V powered LED Flasher circuit diagram. This circuit can flash 1. 7V or 2. 3V LED (depend on the color) using 1. 5Vdc input. The LED will turn on when the 100u capacitor jacked up by the collector of BC557. The circuit is a charge-pump....
A circuit diagram that can be used for the generation of CW Morse code is shown here. This circuit can be very useful those who would like practice Ham Radio. The circuit is nothing but an astable multivibrator based on NE 555. The frequency of oscillations....
Uses probe containing Clairex 905HN light-dependent resistance element, connected to DC differential amplifier driving meter having specially calibrated scale. Article gives calibration procedure. Switching circuit provides constant check on voltage of 22.....
This is the pulse width (time) / voltage conversion circuit, according to the diagram component parameters, it can convert 0. 1 S pulse width into 10V output voltage. When time pulse input end is added input conversion pulse, the analog switch Sl is....
A way to boost the wattage of my small scale Tesla coil. I`m not getting good wattage going coming off the secondary. I`m not sure what the current or voltage is but from what i can tell is that the coils are resonant and that the output is like 100kv at....
Model aircraft pilots like to use PC-flight-simulator software to train the handling of model aircraft without the risk of the loss of real models. It makes sense to use the own model aircraft remote control (RC) as input devise for the software. This....
This circuit is a mini bicycle bell. Mini bicycle bell is connected using the bell as a switch. If the button is pressed, an electric current flowing on the 9V voltage electronic circuit through the transistor Q1. because the speakers are connected to the....
If you feel that somebody is tampering with your telephone line you might find this little circuit useful. It detects if there is another telephone connected to the line, if there is a short or an open line. Sound and a flashing light will tell you which is....
Hello how can find the output of capacitor microphone in theory or augur it without test in? for example in these circuits what is the output of each....
A LED to indicate when a DC voltage reaches 5 volts or more. I don`t want the LED to be dim when it is at 4. 5 or anything. I just want it to be full bright at 5, 0 bright at anything below 5. Is there a way I can do this with discrete components (no IC`s,....
Analog baseband digital circuit table of contents:, Emi interface, BPI bus, Jtag, LCD interface, keypad, UART, mint, Gpio, and Mcp keypad, audio, RF, I/O connectorPower cones, serial time, battery charging and analog, Led driver, RF control, Jtag, iota,....
Integrated circuit input side has a oscillating circuit,it`s oscillation frequency depends on external components L1, C1 and sensor`s equivalent capacitance, the latter size increases with liquid immersion. Oscillating signal add on the threshold switch....
Electronics Tutorial about DC Motors, Electrical Motors and Stepper Motors used as Actuators including PWM and Transistor H-bridge Motor Control....
This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1. When the....
This simple circuit will energize and de-energize a relay at the push of a button. Any type of momentary action push-to-make switch can be used. Pushing the button once - will energize the relay. And pushing it a second time - will de-energize the relay.....
Many microcontrollers or PICs will have uncommitted digital-to-analog converter (DAC) outputs that can be used to generate sine waves. But these are generally low resolution (8 to 10 bits), yielding a total harmonic distortion (THD) in the 1% range. Or,....
This is the first circuit I created. Working principles are described in the "Basic Info" page. The transistor connected to the led isn`t really necessary, but I prefer using it to get maximum power. The Pushbutton SW1 is placed between the battery and the....
A bidirectional H bridge DC motor control circuit is shown here. The circuit is based on the IC L298 from ST Microelectronics. L298 is a dual full bridge driver that has a wide operating voltage range and can handle load currents up to 3A. The IC also....
This simple logic probe has both LEDs on with no signal at the input but due to the nor gates connected to the probe, indicates correctly when a high or low signal is present. It also works correctly for pulse trains. Normally both LEDs are forward biased....
The LV2282VA is an FM Transmitter IC. MPX block makes stereo modulated, composite signal from L and R sound inputs. RF VCO include FM modulation function. Audio AGC function keeps FM modulation well regulated. PLL 2 synthesizer determines RF output frequency....
This intercom circuit suitable for accompanying door bell. This circuit uses the speakers both as microphones and as loudspeaker. This intercom is made....
The information here is primarily intended for home brewers that want to build the analyzer or want to design their own based on the principles of the design. It is not intended for use in commercial applications ! If you want to build the analyser a warning....
THE circuit shown provides a smooth, piercing, wailing siren with a minimum of components. Not only this, but three spare gates of hex inverter IC1 remain, which means that a true cacophony could be created by running two sirens off the same i. c. Gate IC1a....
Using the LTC4060 integrated circuit, can be designed a very simple smart NiMH battery charger electronic project. This electronic charger circuit project is a complete fast charging system for NiMH or NiCd batteries. This NiMH battery charger circuit....
Here is a schematic diagram of electret microphone pre-amplifier using LMV721 op-amp. because the LMV721 has low noise and low power features, it would be an...
This easy as well as cheap but effective device is mainly intended for your ease to leave your fish autofed. You need no longer worry your fish would starve as this autofeeder would replace your job. This autofeeder device will expell pellets by quantity as....
This is a project for a versatile, digital signal processor (DSP) based generic driver and controller circuit for Solid State Tesla Coils (SSTCs). Support for all new topologies (DRSSTC, OLTC, PLL-SSTC, . ) can be implemented programmatically. The same....
The MCU is ATMEL 89C4051 CMOS Microcontroller having 4kB code memory, 128 bytes On-chip RAM and 8-bit Port1 and Port3. The A/D chip is HARRIS CA3162, 3-digit DVM. The A/D converter employs dual-slope integrator providing 10Hz sampling rate. Digital output....
The solenoid requires a certain amount of current to generate its magnetic field. If the solenoid was a perfect inductor, the DC current would rise above all means and would most likely damage other circuit components. However, solenoids inherently have a....
The CGS89 is a sequencer designed for delivering pulsed or gated events, for rhythm and percussion, triggering other sequencers, or selecting stages in Programmers such as the Serge R15 PRG. It can be used as a replacement for the first generation Serge R10....
It can change the frequency range, and the oscillating signal is adjusted by potentiometer RP1. Since the output resistance is very low ( 1K ©), it issuitable for various kinds of control circuit as a source. In the circuit, the transistor`s collector....
Magnets with a very long coil wound around transform the vibrations of strings into an electric signal. (We are talking about "magnetic" pickups, not "piezo" pickups. ) In 1 Volume/2 Tone or 1 Volume/1 Tone types, the pickups` hot wires go to the selector....
The first circuit, shown below, tests saturated turn-on time, while the second circuit tests saturated turn-off time for a 2N2222 transistor. Note that the first circuit schematic takes the output from the collector, which is pulled high to Vcc. While the....
The saving lamp circuit has the glass cover type and exposed type. Glass cover types have three series of spherical, cylindrical ball, processing type, etc. , the first two series have completely four types of transparent, carving, engraving and white color.....
No fire replaced ignitor still no fire checked for voltage to valve assy none checked safety switches on fire box & vent normally closed condition okayhow do I check the centrifical switch & pressure switch for proper operation....
