Popular Circuits Page 106
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As shown in Figure 16-4, a CD4017 is connected as senary counter, and the input clock is 300Hz.VD1 ~ VD9, R1 ~ R3 form the three three-input OR gates, which can respectively get two 50Hz three-phase wave signal with 120 degrees phase difference. A, B, C can....
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By combining a common 78L05 with an integrated audio amplifier of the type TDA2030, an adjustable voltage regulator can be constructed in a very simple manner that works very well. The output voltage is adjustable up to 20 V, with a maximum current of 3 A.....
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It is developed that the ones that assist driving system intelligent improvement and car electronic system that demand to the car as people are networked, new radar for back running vehicle should can serial range finding and reveals the distance of....
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The right leg driver circuit is where many amplifier board circuits common signals are summed and inverted though the Right Leg Driver circuit & sent back to the body to cancil out common voltages. This ground point could be a ear lobe. Their also is a 3....
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This inverter uses a 12.6-V to 120-V transformer to deliver a quasi-sine wave that has the same rms and peak voltage ..
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This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic reed contacts, foil tape, PIRs etc. But it`s easy to add a normally-open trigger.....
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The Testatika design based on the Pidgeon/Wimshurst machine is of course only one type of electrostatic generator to build this system around. Since the early 1900s such power generators have come a long way in sophistication - and in power output - recently....
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As shown in FIG lithium battery is a constant current charging control board, the figure Q1, R1, W1, TL431 composition precision adjustable voltage regulator circuit. Q2, W2, R..
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The following circuit shows about 20dB VHF Amplifier Circuit Diagram. This circuit using the BF197 Transistor. Features: simple circuit, with ....
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This touch sensor switch can is designed using inverters (N1, N2)and some common electronic components. In standby state at the entrances of N1 there is a signal produced by oscillator N3/N4. At the touch sensor hand capacity forms a bridge to the ground for....
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An ordinary energy system comprises a generator and motor (common view), and can be completed with an electric current feedback as shown here in electrical circuit (a) In case (a), the system once started, will slow down and stop because of friction,....
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The USB Performance monitor is a PIC18F2550 based device which shows the performance of your computer using two analogue meters and a RGB LED. The design is based around a stock Hi-Fi VU-meter which is controlled using PWM from the PIC18F microcontroller.....
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As shown in the figure shown for a typical circuit LM4916 two-channel amplifier. ..
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This protection circuit is inserted between the reset switch and the motherboard. The earth connection of th..
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This circuit is a traditional summing amplifier configuration with the addition of the de clamping circuit. The operation is quite simple; each component-synchronization, color burst, picture information, etc.of the composite video signal is applied to its....
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Delay electronic doorbell circuit - touch doorbell amplifier circuit ..
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The Dogm-graphics-module should be connected to the Arduino board as shown below. Pin 12 (MISO) of the Arduino board must not be used. Additionally the Dogm-graphics-module requires an addess line (A0) which can be connected to any output port. The following....
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The amplifiers of a LM3900N device can be conveniently used to make a mixer unit for audio purposes; the unit enables three separate audio signals to be mixed together to produce a composite output. The audio mixer circuit shown provides this facility using....
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As shown in FIG grounds MAX4106/4107 using a capacitive load drive circuit isolation resistor Rs constituted. MAX4106/4107 good AC characteristics, but they are not designed to..
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The FM broadcast band was moved immediately after World War II from its original spot just below 50 Mc to the present 88-108 Mc band. Hallicrafters was one company to offer receiving converters for those who had the old FM radio sets. The offerings....
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Rosemary's original test circuit is shown in the article she tried to have published in a "refereed" scientific journal, but the submission was always rejected. In the last 5 months, I have had extensive email correspondence, and numerous telephone....
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Here is a circuit of a LED sequencer / chaser using CD 4017 and NE555 IC. CD 4017 is a CMOS counter IC consist of 16 pins. This IC gives 10 outputs according to the clock pulse it receives from the clock input, which is pin 14. The another IC used in this....
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We had already connected Phase & Neutral (from Power house) to Electrical Appliances i. e. Fans, Light points etc. So according the above UPS Connection Diagram. connect an extra wire (phase) to those appliances where we have already connected phase and....
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After some years i started using the NMS8280 again for HAM radio purpose. When sending a signal in the air, radio amateurs should always identify by giving their callsign, this is also the case for sending a video signal. I wrote a program using the WBASS....
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Capacitor Cl is connected continuously through the supply of 3 volts to 10 megohm resistor Rl. The capacitor is charged (relatively slowly) to 3 volts. The wink SWI is closed, it connects the charged capacitor (Cl) in series with C2 and R2. The capacitor C2....
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Below is the final schematic for the Menta ECG Simulator project. LadyAda`s Eagle schematic for the Menta was used as a starting point and I simply ad....
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A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion....
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555 timer circuits LM555 - Astable Oscillator Calculator + Capacitor Calculator, Basic Circuits For The LM555 Timer, Triggering And Timing Helpers For Monostable Timers, Controlling Circuits For LM555 Timers, Advanced Circuits For The LM555 Timer, LM556....
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This article provides conversion instructions for radio model # GE/MACOM MASTR-III Group 2 (150. 8-174 MHz) Repeater or Base, Combination Number SXS, to allow it to perform adequately in the 144-148 MHz range. Please be aware that this document is currently....
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This is an amplifier circuit that has a high output power is 1400W mono, the audio amplifier circuit is very suitable when used in a large room, using a woofer speaker, and fullrange. To sound out very nice, loud sound and almost no noise. The amplifier....
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SigmaTels STAC9721 STAC9723 is a general-purpose 18-bit stereo, full duplex, Audio CODEC that conforms to the Analog component specification of AC`97 (Audio Codec 97 Component Specification Rev. 2. 1). The STAC9721 STAC9723 incorporates SigmaTels proprietary....
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This assemblage was advised for amateurs owning an old accumulating of vinyl recordings and absent to accept it digitally remastered into a claimed computer. Or sometimes they would accept to an old, invaluable, LP accumulating through their avant-garde....
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This example describes a metal detector which uses a PLL (phase locked loop) digital integrated circuit MCl4046, it can emit the alarm signal when detects metal objects, and it can determine detected material which is based on current meter`s instructions.....
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Create a rapid transmitter/receiver pair that anyone would have around their house. I decided that AM or FM radio would be good since everyone can receive that, and pondered how best to generate the necessary radio signal and modulate it appropriately. After....
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This circuit makes a very compact level indicator where a meter would be impractical or not justified due to cost. Resistor values will depend on type of LED used. For MV50 LEDs the resistors are 2 K for steps of approx 2 V and current drain with all three....
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A8902 ; A8902 is a typical application wiring diagram. After a system failure signal by the delay Island and CB 11 feet into the motor brake, stop stop work until the RESET sig..
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As shown in FIG wind speed programmable circuit. The circuit consists of step-down rectifier circuit, a multi-stage cycle timing circuit, phase shift control circuit, thyristor..
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This project is used to automate the home appliances through Bluetooth enabled PC. You can use the USB Bluetooth at the PC side and an Serail Bluetooth converter is used at the microcontroller side. The sparkfun bluetooth module is used here, but you can use....
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To obtain an accurate pressure value, we must remove the offset errors. There are? many basic circuit designs that is used to remove the offset errors. This...
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Using an inductor inline and a decoupling capacitor it`s creating essentially a series LC circuit. Now one of the properties of LC circuits is they have a resonant frequency. I modeled a LC circuit with an attached purely resistive load to simulate what the....
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DC to AC inverter`s function is to convert Direct Current (DC) voltage to Alternating Current (AC) voltage. DC to AC inverter is commonly used for converting High Voltage DC (HVDC) transmission voltage back to AC, and for converting the DC output voltage of....
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CAT3200 and CAT3200-5 is switched capacitor boost converters, they can adjustable output voltage and low noise. CAT3200-5 output voltage is fixed to 5V. CAT3200 can use an exte..
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The control of electronic potentiometers in most today`s applications comes from controller-generated signals. However, a significant number of applications exist that require adjustments using manual, front-panel controls. The circuit in Figure 1 uses one....
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The Skeyeball project is an ongoing project in the Indiana University System Design Methods Laboratory for both graduate and undergraduate students to perform embedded system design and implement various projects. The downlink portion of the project involves....
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To prevent loss of data when a CMOS RAM is switched from normal operation (Vcc = 5 volts) to stand-by mode (Vcc = VBAT) it must be ensured that the CS pin goes near the Vcc rail at all times. Ac coupling to the chip select is made through capacitor C,....
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DTMF dual tone multifrequency The signal is a commonly used signalling in the telephone network, no matter on home telephones, cellular telephones or SPC exchanges, adopt DTMF signal transmission receiving numbers more. DTMF technology can also be used for....
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Here the NE555 is wired as an astable multivibrator. When the push button switch S1 is pressed the LEDs D1 & D2 will flash alternatively. That is when output is high D2 will glow & when output is low D3 will glow. The rate of flashing will depend on....
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High quality AM radio circuit based on TDA1572 IC. The AM radio receiver circuit operates from 9V DC and has 1W output power. Requires minimum external components....
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This circuit has accouterment for abutting stereo outputs from four altered sources/channels as inputs and alone one of them is selected/connected to the achievement at any one time. When ability accumulation is angry on`, approach A (AR and AL) is selected.....
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Laser torch is cheap and has high cost performance. The main feature is the excellent performance of the condenser, and the optical rangeis up to 1200m ~ 1500m, and the spot is still small from a few hundred meters in visual observation, so it is widely used....
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This circuit serves to show the speed of the vehicle in kmph. An opaque disc is mounted on the spindle attached to the front wheel of the vehicle. The disc has about equidistant holes on its periphery. On one side of the disc an infrared LED is fixed and on....
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Is possible to syncronize the leds so that first, the speakers are still playing aloud, and two, the led are not always on during music playing. i pretty educated in electrical so i hope there is anyway at all to do this. Thanks. I`m having trouble following....
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Inverters U1a and U1b are connected in a simple RC oscillator circuit. The frequency is determined by the values of R1, C1 C2 and the internal characteristics of the integrated circuit. As long as the circuit is oscillating, a positive dc voltage is....
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Now the capacitor C from the speed differential negative feedback. Adjustment potentiometer RP, can change the amount of negative feedback. It can be used simultaneously both the necessary circuit...
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A TDA1024 electronic thermostat senses soil temperature via thermistor R6. The circuit uses zero-crossing switching of the heater. The heater is made of elastic-coated steel wire. PI is used to set the temperature. The heater should have 2 or more....
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This circuit was designed and used to transmit commands over LNB coaxial cable. An LNB (or LNC) is a low-noise block downconverter typically used for satellite TV reception. It`s fitted in the focal point of a satellite dish. [LNB Cable Data Transceiver....
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A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. The most common form is the astable or oscillating type, which generates a square wave - the high level of harmonics....
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This circuit is high voltage regulator which has foldback current limiter protection. This circuit uses LM10 comparator with voltage reference, and this core...
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Long range, very stable, harmonic free, FM transmitter circuit which can be used for FM frequencies between 88 and 108 MHz. With good antenna transmitter can cover 5km range. It has a very stable oscillator because it uses LM7809 voltage regulator which is a....
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The use of a switching transistor (like a 2N2222 or 2N3904) allows use of the CD4511B with a common-anode display. should be chosen to provide about 1 mA to drive Ql and Rr should provide enough current to drive the display...
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Circuit shown in Figure 3-176. This adjustment method, the motor can run at equilibrium, adjustment range and relatively wide. But requires a three-phase voltage regulator, hig..
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THE FM3954 monolithic-dual gives us an ideal low-offset and acts as low-drift buffer function for the LM101A op amp. Track over it`s bias current range thus....
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Uch as the Hot-Rod enthusiast is forever tinkering with his `wheels` to be `just a little different`, so are guitar players forever tinkering with their guitars and amplifiers in an effort to be `just a little different`. We are always swapping pickups....
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The schmitt trigger circuit is built around a single LM741 op-amp, its output buffered by a transistor, which in turn energizes a relay. The relay may be replaced by a red LED if desired. The LM741 may be replaced by a LF411 or other JFET input op-amp with....
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The device implements the USB boot HID keyboard protocol so once plugged in, the device can receive keyboard LED state changes (caps lock, num lock, scroll lock), which are used in the firmware to trigger new password generation (four LED toggle messages, i.....
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Here is a deluxe version of the simple charge rate limiter, using the same idea but with the ability to charge two packs simultaneously from a single wall charger. For circuit description and parts list, see the simple charger page. Since wall chargers....
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hi, i am using YENKA to diagram circuits. i dont get what it is doing when working out voltages in a basic series circuit. the picattached showsthe....
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Like the first two Hijack Alarms - if a door is opened while the ignition is switched on - the circuit will trip. And after a few minutes delay - when the thief is at a safe distance - the Siren will sound. But this time the engine does not go on to fail....
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The Tesla Coil I’ll be using will use a HV (High Voltage) power source that gives off 9 kV at around 30 mA. The rest of the Tesla coil will be made of 6 Glass bottles, Table salt, Oil, and Aluminum foil for the capacitors, the Primary coil will be made of....
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The crystal operates into a complex load at series resonance. Ll, Cl, and C2 balance the crystal at zero reactance. Capacitor Cl fine-tunes the center frequency..
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The first board was digitally controlled but the actual welding current is analog. This allows the board to operate real time without the need for the CPU to process the voltage/current. A block Diagram is shown below: It is basically a switching power....
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A project of a 555 tester circuit, the circuit will start blinking LEDs when power is applied which will indicate that the IC is working correctly....
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This schematic is modified from an old Bell & Howell projector amp for model 302 - PP 6v6`s with a 12AU7 PI. Can anyone identify the PI circuit It appears closest to "floating paraphase" to me. My only complaint with this circuit is that I`d like more clean....
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Every DAC board and also decoder includes power supply part. Only one part which missing is power transformer. It is possible to use for example toroidal transformer with a power switch and fuse holder on a chassis. I offer here one of many variants where is....
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Each family essential small appliances. Sub-type and electric power jet, mainly used for clothes and shake hot shaping. Irons circuit shown in Figure 1-30. When we use iron, ir..
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The transceiver is composed by three single sided printed boards 100x70 mm, theese may be
stacked so as to reduce the overall size of the metal cabinet. I suggest to employ small size
components (1/4 W resistors, 2,5 mm capacitors, ) wich should fit....
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The diagram shows a rather simple voltage stabilizer design which can hold huge output power in the order of 5 to 10KVA. The use of SSR or solid state relays makes the output stage easy to configure and very accurate - thanks to the modern SSRs which are....
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Here is a new audio power amplifier schematic built around TIP darlington pair transistors. You can use this circuit for home audio power amplifiers and car audio amplifiers. The TIP142 and TIP147 darlington pair transistors forms a push pull high power....
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This high-performance charger quickly charges gelled lead-acid batteries, and turns off at full charge. At first, the charg..
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· This circuit is used for analog signal selection or time division multiplexing. As shown, the feedback signal places the selected amplifier channel in a voltage follower (noninverting unity gain) configuration, and provides very high input impedance and....
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The following circuit shows about Two-Transistor DC Motor Driver Circuit Diagram . This circuit using the TIP32 Transistor. Features: runs in ....
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The design also overcomes the shortcomings of modem interference protectors. The design eliminates mutual interference between phones and modems, is compatible with the line-usage indicators on multiline phones, can search for an idle phone line in multiline....
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It uses thyristor control. Flash frequency is determined by Ri, RP, Rz and C. Adjusting the electrical locator RP, can change the flash frequency 0.5Hz to several Hz...
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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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Those days when I come home at night and strait into the darkness are finally over. This is a very practical device and I built it so that it is a module t....
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This is a design circuit for tone/frequency detector (decoder) circuit that can be used to detect the presence of a signal with a certain tone. The output of the circuit will be active if the signal is the same tone with the tone of a series of internal....
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