Popular Circuits Page 80
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Equalizer a passive or an active electronic element or circuits (like tone control) used for the reason of altering or flattening the frequency response characteristics of a system NE5532 an internally compensated low noise dual operational amplifier with....
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The circuit described here can create three different US-style` siren sounds: police, ambulance and fire engine. The desired sound can be selected using switch S1. The circuit can be used in toys (such as model vehicles), as part of an alarm system, and in....
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Most cards of sound in computer, are deprived stereo input for microphone, on the contrary have stereo input for high level [ Line ]. The circuit uses the input Line of card of sound, in order to we place a two mono stereo microphone, in the input of card of....
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KGA8010 is a Broadband distributed Amplifier using 0. 1um-gate GaAs P-HEMT and coplaner waveguide technologies. KGA8010 CAN be used as a multi-purpose Amplifier for 40Gb/s optical Communication and millimeter wave applications. By Oki Semiconductor ..
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A mobile phones microphone or mouthpiece is a component used to convert sound signal into an electrical signal. The earpiece speaker is the one that converts electrical signal into a sound signal, likewise also the IHF, buzzer or ringer speaker do. A typical....
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SEL2411AA is a sub package of SEL2410, If you need see the description, please click SEL2410. If you need SEL2411AA`s datasheet, please download it from below. By Pericom Semiconductor Corporation ..
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As shown in Figure 4 hours AC timing circuit. In this circuit, BH4024 is 7 serial binary counter/divider 555 time base circuit. AN is timed touch of a button. Each press AN tim..
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The pulse width of the compact pulse cum frequency modulator can be varied by altering the change-over point of comparator IC1 with a control voltage via resistor R1. The hysteresis of the IC is determined by resistors R3 and R4. The control voltage also....
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The circuit, is a comparator, can measure with step of 1Volt, the voltage of battery of car. The clue of voltage become after comparison of voltage of battery, that is applied in the inverting inputs of amplifiers, with voltages of reference that are....
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This signal generator uses a three channel DAC to generate Composite video signal (CVBS) and S video signal (Y/C separated) at the same time, left one channel is not used in NTSC format. It is assigned for one of the color components of Y/CB/CR video format...
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sPlan is a software with already many thousands enthusiastic users. You need a software to design your schematic circuit diagrams easy and fast? You wont get pass sPlan! No matter if you only want to sketch a little circuit diagram or if you need to design a....
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White LED can be used in series or parallel connection, both solutions have advantages and disadvantages. The disadvantage is that parallel the LED current and brightness do not automatically match...
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Suitable for monitoring an amateur band or a segment of the radio spectrum, this simple adaptor uses an NE602 mixer-oscillator chip to produce a 455-kHz IF signal, which U2 amplifies, then feeds to detector D2 and the Y axis of an oscilloscope. VT is used....
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This simple circuit can be used to program the PIC16F84 and similar "flash memory" type parts. It uses a cheap 555 timer IC to generate the programming voltage from a +5V rail, allowing the circuit to be powered from a computer`s USB port. The 555 timer....
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The camera rotator circuit uses a 2716 EPROM to store a table of logic values that control the motor driver (H-bridge) circuit. The EPROM data is shown in the schematic. By using the EPROM, a large number of discrete gates are eliminated. The logic table is....
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This page provided to the domain owner free by Sedo`s Domain Parking. Disclaimer: Domain owner and Sedo maintain no relationship with third party advertisers. Reference to any specific service or trade mark is not controlled by Sedo or domain owner and does....
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Figure 1 shows the 10. 58 to 10. 74 MHz VFO oscillator circuit. Yes, this is the same circuit that was presented last, but I`ve re-designed to show the Colpitts oscillator more clearly. "L" is approximately 1. 5 uh, 19 becomes a core T50-6 (yellow). The....
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On the breadboard, build two bi-directional motor control circuits (also known as "H-bridge") circuits. These circuits will control the two DC motors that drive the wheels. Each circuit will have two wires from the Arduino (one for forward, one for backward)....
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As shown in FIG lighting controller with lights getting brighter gradually eliminate function, which can make the lights do not appear when the lights suddenly brighten the human eye irritation and damage the inrush current can be reduced when the ..
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This circuit is a circuit FET Cascode Video Amplifier. The cascode amplifier FET loading the video features a very low input and feedback reduction is almost zero. 2N3823 was used because of low capacitance and high Yfs. Amplifier bandwidth is limited by the....
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This kit is a daughter board, designed by Jan G0BBL and Tony KB9YIG, that provides four electronically switched band-pass filters for the Softrock Lite + Xtall V9. 0 RX, replacing the single-band daughter board in the original design. The electronically....
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NOPPP is a simple programmer for PIC16C84, PIC16F83, and PIC16F84(A) microcontrollers. It attaches to the parallel port of a PC. Plans were published in El....
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Figure 1 is a generalized block diagram of a multichemistry battery charger. A COP8ACC5 µC handles its key charging features. The µC is available in a 20-pin (15 I/O pins) SOIC or a 28-pin (23 I/O pins) SOIC/DIP. It contains 4 kbits of internal ROM...
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The circuit uses four NAND gates of a 4011 package. In each oscillator, while one gate is configured as a straightforward inverter, the other has one input that can act as a control input. Oscillator action is inhibited if this input is held low. The first....
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This page shows three circuits for using the 555 timer IC as a photocell controlled train detector.
The circuit is shown driving light emitting diodes but any load of less than 200 milliamps could be used.
Shown on the schematic is a secondary....
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I`m a bit of a newbie, but I love to experiment. I thought I would try to make a small guitar amplifier using some of the circuit designs posted here. I`m thinking of using this 30 Watt design (actually, the single 12VDC version mentioned in the comments....
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The Smart Ballast IC is designed to control a Fluorescent Lamp Ballast including a Discontinuous Conduction Mode Power Factor Correction (PFC), a lamp Inverter Control and a High Voltage Level Shift Half-Bridge Driver. The application requires a minimum of....
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This circuit symmetrically divides an input by virtually any odd number. The circuit contains n+l/2 clocks twice to achieve the desired divisor. By selecting the proper n, which is the decoded output of the 74LS161 counter, you can obtain diisors from 3 to....
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Arduino can drive many kinds of motors. But the low-power signals from Arduino need to control high-power circuits to run the actual motors. Here we will give examples of ways that Arduino can control different types of motors of different sizes. A Motor....
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A relay and two diodes are all tliat is needed the relay performs the job of a buzzer so no annunciator is required. When the lights are left on, but the ignition is off, the normally closcd relay contacts are in series with the relay coil. That means the....
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As shown in Figure 3-105 2Y/2Y-connected two-speed motor stator windings lead wiring diagram. ..
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This device is a simple timer, allowing to keep on the headlights of your vehicle for about 1min. and 30sec. , e. g. when accessing some dark place, without the necessity of coming back to switch-off the lights. Pushing on P1 allows C1 charging to full 12V....
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This section describes an experimental low power, low bandwidth data signaling system that operates at 100 MHz (In the FM broadcast band in the U.S.). Before operating a radio transmitter, find out what kind of transmitter operation, if any, is permitted in....
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Darkroom circuit one time exposure It audible signal when the developing time is coming. This circuit can be used to put photofinishing big timer, it can also be used for many ..
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Simple Timer With 555 is one example of a simple timer and can be applied to electronic equipment. With 555 Timer Simple series takes advantage of the mode of the IC monostable multivibrator 555. With the relay output control circuit can be used to control....
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This simple FM wireless microphone transmitter can transmit speech over a short range. It can be used as a simple cordless microphone. The circuit uses two....
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Analog Geiger Counters are useful for detecting radioactivity and performing nuclear experiments. The GCK-01 model has numerous customizable options and comes as a ready to build kit. These Geiger Counters primary indicators are an audio click and an LED....
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This toy traffic signal uses a single low-cost hex Schmitt-trigger inverter IC (IC1a-IC1f) to directly drive three coloured LEDs (red, green and amber). At switch-on, the circuit lights the red signal for 30s, then shows green for 6s, then amber for 3s. It....
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I currently own 3 metal case PETs, a working 8032 that I restored about a year ago (was working, just needed physical TLC, and still needs a tube), another 8032 that has never worked, and a 4016 that has never worked. I finally got the bug to start working....
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This is the video amplifier circuit or the video splitter circuit, it is designed to take video signal is stronger. Compensate for the loss of signal, and is....
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Ul is a dual voltage comparator with open collector outputs. The A side is an oscillator operating at 100kHz, and the B side is part of the regulation circuit that compares a fraction of the output voltage to a reference generated by zener diode D2. The....
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Before trying to understand a full bridge circuit, you may care to read up on PWM controllers, which page also describes how a half-bridge circuit works. Most full bridge motor controllers also use pwm! Designing a full-bridge PWM circuit that is reliable....
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Home built NMR spectrometer, showing the construction and circuitry. Demonstates 90 degree and 180 degree pulse sequence, and generation of FIDs and spin echos at 18 MHz....
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This regulator is for the purpose of controlling a dc generator. The field configuration is that one side of the field is grounded. D4 prevents the battery from discharging through the generator and takes the place of the mechanical cut-out relay...
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This power supply uses two VN400A 400 Volts MOSFETs in a half-bridge power switch configuration. Each output consists of +5V at 20 A and 15 V at 1 A. Three-terminal regulators are used for the low-currents outputs, either 12 Volts or 15 Volts can be made....
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This circuit will generate an ear-splitting 110 dB from 9 V. The setup uses a single 74C14 (CD40106B) CMOS hex inverting Schmitt-trigger IC, wliich must be used with a piezoelectric device with a feedback terminal. The feedback terminal is attached to a....
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A couple of changes on the dead band and Pulse Stretcher resistors, and the Position feedback potentiometer has been hacked around to function as a "zero the speed" or "center your transmitter sticks". The rest is just the addition is a fairly traditional....
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A wireless interface for your next project Got some wire With a coil, a cap and a transistor, you can make your next project emulate a Radio Frequency Identification Device (RFID), commonly called a "tag" or an "RFID tag. " Here`s how. A device usually....
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Here is a simple radio that is easy to build and inexpensive. In fact, you probobly have all the parts you need in your junk box. You`ll be suprised at the great reception with this little set...
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BlinkMs are a lot of fun by themselves, but they`re also little network devices, each having its own address on an I2C network. Here`s where I think BlinkM can really shine since it makes controlling multiple RGB LEDs pretty easy. For Maker Faire, I wanted....
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Hi everyone. I have a quick question. I`m trying to devise a circuit that works off my car locks. Basically they get a negative pulse, which starts a latched relay, which will power up the ACC line going to the startup/shutdown controller. I`ve included a....
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Red = V+, Black = V-, Green = GND, Yellow = Mic Input, Orange = LED Output. The op-amp I`m using is an LM741. It`s supposed to change the peak brightness of the LED depending on the ambient sound level. The frustrating thing is that the simulator is happy....
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This Do-it-yourself lightning detector ambit can be a abnormally acute changeless electricity detector which can accumulation an aboriginal admonishing of abutting storms from inter-cloud acquittal appropriately above-mentioned to an earth-to-sky....
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There are now extremely wideband software defined radios (SDR) where the wideband antenna is a natural choice. Wideband small magnetic loops (WSM loop) are used already 3-4 decades and I was curious to see what can be reached with them and to evaluate their....
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Firstly, we will describe the "add-on" version for the 5x7 Display as this is the cheapest version and, quite frankly, it only deserves a few dollars as a piece of test equipment.
It`s "all the rage" to have an Electrolytic Tester for servicing equipment....
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Wireless FM transmitter circuit Microphone Hi Fi using a model-ready transmitters, this is because the buil-up transmitter module has a transmission capability of a stable and very effective to emit 10 mW RF. so that the target of Hi Fi FM Wireless....
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This schematic diagram below show a circuit of VOX Box (voice-operated switch). This circuit consist of a Schmitt trigger, a relay driver, and microphone....
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LED1 and LED2 indicators turn on and remain on, each time the circuit is triggered. During the timing cycle, U1 "s Q output at pin 10 becomes positive when the Q output at pin 11 becomes negative. ..
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For successful circuit-building exercises, follow these steps: Carefully measure and record all component values prior to circuit construction, choosing resistor values high enough to make damage to any active components unlikely. If there are any....
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As shown in FIG, Vcc to the circuit is V power supply. After receiving the first signal frequency becomes 21.7 MHz, 21.7 MHz and then after two crystal filter to enhance the se..
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As shown, the circuit includes a clock pulse generator, and a pulse distribution circuit drives the display circuit. 555 and RP1, R1, R2, C1 composition astable multivibrator, ..
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It consists in 555 feet, respectively, of 1, 2-cited two-pin, using two needles with a high water level higher than 555 when the probe capacitance between 1, 2 feet circuit leaving 555 low potential output. Contrary to the output of high potential (555....
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741 Stereo PreAmplifier Circuit Diagram This preamp circuit provides better than 20dB gain in each channel. PARTS LIST R1 -....
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Transmitter: Pressing the SB will make the transmitter circuit work. D1, D2 and R2, R3, C4 constitute a low-frequency oscillator to control the audio oscillator composed of the D3, D4 and D5, D6, then it works alternately. The generated audio signal is added....
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Fans are hoping to make a high-quality amplifier, but the most outstanding publications published on the circuit, they often too complex and difficult to start 6 This article d..
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A bit-error-rate (BER) tester is a basic tool for digital-communications measurements. Although many commercial BER testers are available, you can easily design and build an inexpensive version. The scheme in Figure 1 has performance similar to that of a....
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Experiments with couple of floppy drives I have and it appears that on the step pin, current is limited to around 5 mA. This means that we can indeed omit the collector resistor in this case. For base, I`d recommend a 1 kiloohm resistor. This will give us 3.....
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According to current legislation in many countries, vintage cars must also be fitted with a fog lamp at the rear. In modern cars, there is a bit of circuitry associated with the fog lamp switch to prevent the fog lamp from going on when the lights are....
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The machine used a 12 digit display (8 LED anodes scanned by an Anode driver, and 12 `digits` scanned by a Cathode driver, the latter being used also to scan the keyboard`s 7 columns. The bus is also simplified : 4 lines : the clock`s 2 phases, the Sync line....
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A simple circuit measures the open-circuit voltage, such as the expanded-scale voltmeter circuit in Figure 2, which follows the curve in Figure 1.
Sealed lead-acid batteries are available in several sizes, from a single D size (2.5 Ahr) to multicell....
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As shown is a 12V constant voltage charger. The power supply circuit with the same basic circuit. Resistance Rl 0.2, limiting the role played, the equivalent of increasing the ..
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The Elect. Sel. 8 is a simple circuit, with a choice of 8 sources of any sort ,of 8 independent switches. Each switch corresponding with a relay for example the switch S1 activates the RL1 e.t.c. The uses of the circuit are quite a few, choice of entrances....
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The pin 3 output of the 566 can be used to provide different charge and discharge currents for Cl so that a sawtooth output is available at pin 4 and a pulse at pin 3. The pnp transistor should be well saturated to preserve good temperature stability. The....
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In the circuit of Figure 1, assume that a brush-type dc motor must drive a load back and forth between two endpoints on a lead screw. Optical sensors determine end of travel, and an SPDT switch selects to which end to send the load. The sensors themselves....
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The subwoofer is a subwoofer or a speaker to reproduce low frequencies, devotee of 20 Hz to 150 Hz electronic circuit diagram below shows the details of a scheme of the main amplifier TDA1516 22 watt in 4 ohm car subwoofer driver. This device is designed for....
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Now the camera mount is very sturdy, and I went a year without using one a tether, but if you like to ski through the woods filled with deep powder, let me tell you: a safety strap is a good idea. It`s made from a 12" toy dog collar! All you do is slide the....
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This is a metronome circuit that has mechanical sound character. The metronome that has mechanical sound character will make our life more fun and it would be ...
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Lithium-ion battery charging circuit is shown as above. When it starts to charge. The battery voltage is below 8.4V, IC1`s output has no output. Q2 off, LM317 work in the constant current output. When the battery voltage is increased to 8.4V, Q2 turns on, Q2....
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An op-amp IC (741) amplifies the audio signal from MIC1, and R12 controls its gain. Audio is fed to the oscillator circuit Q1 and related components. D2 is a varactor diode. Audio fed to D2 causes FM of the oscillator signal. L1 is 1/2 turns of #18 wire on a....
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Pressure transmitter circuit data acquisition system by 1B31,18 bit A / D converter AD1170 and MCS-51 microcontroller..
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Here the Arduino UNO schematic diagram (click to enlarge): About Arduino UNO: The Arduino Uno is really a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 may be employed as PWM outputs), 6 analog inputs, a 16 MHz....
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