Popular Circuits Page 117
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If you are busy and cannot answer or do not wish to answer your phone, this circuit will give a busy signal without you ..
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This is a design circuit for soft light dimmer. This circuit uses the IGBT STGP10N50A and the TS555 timer as main components. The timer is triggered on the zero crossing voltage pulse. The time constant determined by C5/R14+R15 that is used to determine the....
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Diode for alternating current is a trigger diode which conducts current only after the DIAC reach the breakdown voltage. The breakdown voltage of DIAC is 30 V..
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The voltage range will be 0V to 24V and I don`t expect to use any more than 4A. A micro and LCD could probably be added to measure voltage and current. Here is the schematic: Basically the circuit looks more or less OK. Regarding the voltage setting....
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This bridge will measure inductances from about 1 to 30 at a test frequency of 5 mHz. A 365-pF AM-type tuning capacitor ..
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Cl, VDI, VD2, C2 composed of simple capacitive step-down voltage regulator circuit + rectifier output of about 8v DC voltage for LM567 electricity. 5,6 feet manifold connected ..
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When setting up photographic floodlamps, it is sometimes desirable to operate the lamps at lower power levels until actually ready to take the photograph. The circuit allows the lamps to operate on half cycle power when the switch is open, and full power,....
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As with any audio mixer circuit, a slight loss is always introduced. The final summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should be around 200mV RMS. The mic inputs are amplified about 100 times or 40dB, the total gain of....
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This audio amplifier circuit delivers up to 200 W of top-class quality for loudspeaker from 4 to 16 ohm. Operating voltage is between 24 and 36 V, max 5 A ..
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The first schematic that we`ll look at is the base schematic of the transmitter without any modification. The RC car`s transmitter circuit has two halves to it. One side (on the left) is pretty much all digital. When a switch(1-4) is pressed, IC1 becomes....
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Notch filters remove a single unwanted frequency from an input signal. They are also a vital component of pulse-shaping networks, such as time-averaging filters. You can tune a state-variable filter over a wide range by changing the time constants of its....
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The LRC input network limits the anode dv/dt to a safe value—below 30 V/jus. Rl provides critical damping to prevent voltage overshoot. While a simple RC filter section could be used, the high current required by the squib would dictate a small value of....
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This is circuit of Clap Triggered Switch. When the circuit detects tap, or short whistle or a clap, this circuit will toggle the LEDs. 33k and 5K6 charge The...
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The following circuit shows about TL084 IC Dynamo Current Voltage Regulator Fuse Box Diagram. Features: the complete control circuit will ....
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Here is the circuit for the FM Bug. In total there are 18 core components that are needed for the fm transmitter to work properly. The far left side has the electret microphone and then things move electrically to the right until they hit the antenna. Don`t....
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The transistor is biased in class A. That`s mean the collector current flows all the time. This current can increase or decrease, caused by the input signal....
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This capacitance meter circuit is similar with previous meter circuit, but it uses transistors rather than logic gates. Here is the schematic diagram: You...
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This super-simple dimmer consists of only two components, and it can easily be built into a mains switch. If you do this, don`t forget torst switch off the associated branch circuit in the fuse box, since the mains voltage is always dangerous! The circuit....
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To demonstrate Rincon`s capability to simulate autonomous circuits, let us consider one-transistor oscillator, which uses phase-inverting resonance T-shape LC circuit. Schematic of this simulator is shown at fig. 1. Design of simulator is described in....
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Most Tesla coils designed for educational and experimental purposes use line-operated, step-up transformer-in setups like that shown in Fig. 1 -to generate the high voltage needed for the coil`s primary circuit. While there`s nothing technically wrong with....
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The chip in the middle with the tiny bullet holes in it is almost certainly proprietary. At best you can salvage a few parts if your time is worth nothing, but you don`t need to know the circuit for that. Olin Lathrop Apr 9 `13 at 14:24 Just to make sure:....
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The following circuit shows about SCR BRY35 For Simple Radio Control Circuit. Features: simple and efficient receiver for operating:(starter ....
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This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) relay circuit. Only 2 wires are required to connect the units together. Due to the low output....
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As shown in the automotive LED driver circuit diagram LT3486 constituted. LED used in the cars central brake light (CHMSL) when there is an advantage: faster reach the set brig..
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In the form it appears the theoretical circuit of filter. In first glance we see three different circuits that are mainly manufactured round two operational amplifiers. This circuits constitute mixed, amplifier with variable aid and a variable filter. The....
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Activated this and advisedly destroyed several 2N3055`s by shorting the emitters to ground. In all cases the transistors opened up and no beneficiary to emitter abbreviate occurred in any transistor. In any event, the alternative ambit in Figure 2 will....
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As shown in FIG grounds PGA203 and isolation amplifier IS0102 constitute isolated programmable gain instrumentation amplifier circuit. PGA203 then amplified by the input signal..
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I added a second RM output and a sync input to the 555. The latter is based off of one of Rene Schmitz VCOs. ( ) ok, thank you. i asked because on the two PCB pictures above there are e. g. two transistors without any specification. the wiard schematics....
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The introduction for unidirectional thyristor trigger circuit is equally applicable to the TRIAC. Here are some also for bidirectional circuit shown in Figure 16-28. Figure 16-28 (a) and (b) is a direct trigger circuit; Figure 16-28 (c)..
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This design was never completely finished, so consider it to be in the very early experimental stage. I don`t sell kits, programmed PLD`s, or provide support for this project, and I will never be published. But if you want to take a bash at making it....
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Circuit works: lC1 is lock ASIC 5C058. Its 1-6 feet were even outside the key switch to the positive power supply, which is six valid key input, open lock A-F must comply with this order. 7 feet for the negative power. 8 feet false key input terminal, even....
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The Supertex HV7370 is a four-channel, high speed, high voltage, ultrasound transmitter damper, and the HV748 is a four-channel, high speed, high voltage ultrasound transmitter pulser. Both integrated circuits (ICs) are designed for medical ultrasound....
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This is a 4 mA TO 20 mA CURRENT LOOP circuit. This circuit is used to transmit a signal over long distances. The accuracy of this circuit is not compromised....
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I've taken the classic Fuzz Face circuit and added optical temperature compensation. This ensures that the output stage is biased at half the supply voltage regardless of variations in the transistors, particularly those caused by temperature. Tweaks:....
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380V air flow I. Power through step-down transformer, rectifier output 9V DC oxime arrested. When the pump working fine basket lr. uT shake F 41Sf button S. * Circuit TWH8778 s..
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The gate N1 acts as a buffer for strengthening the signals from the condenser microphone. The inverter N2 with its associated components forms a radio frequency oscillator in the FM region. The varicap diode BB109 is used for frequency modulating the audio....
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The heart of the circuit is IC1, General Instrument's AY-3-1350 melody-synthesizer IC. IC2 is a TCM1512 telephone ring detector IC that is powered by the telephone line. The circuit's operation begins when IC2 senses a ring pulse on the telephone line. The....
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The result was a project that includes a waveform capture circuit, a graphic LCD (Liquid Crystal Display) and a control panel with LED indicators. As described, the display plugs directly into the waveform capture and control unit, which is what the what the....
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Need to know where is the phisical location of the compressor relay. Also do you know how to test the pressure sensor on the plastic tank on the compressor assembly itself Sorry to take so long to get back with you. I have not been able to nail down the....
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Cookers pot quality detection circuit Shown as cookers pot quality detection circuit. Pot quality testing is by disc lesion induced voltage (EMF) to achieve. ..
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The LA4165M Recording-Playback IC combines the functions required to design the recording and playback systems and Motor Control circuits for micro- or standard-cassette tape recorders into a single chip. Functions provided include Automatic Audio input....
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Integrated circuit Ul (an NE602 double-balanced mixer) is a combination oscillator and frequency mixer. Signals from the antenna input (at Jl) are fed through dc-blocking capacitor C1 to the RF-gain control, Rl, and fed to the input of Ul at pins 1 and 2.....
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The simple circuit offers no isolation, but the simplicity of the circuit combined with cost of sound cards and the fact that diodes 1 and 2 add a good measure of protection makes this circuit ideal for the average user. Notice the physical hardware includes....
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The magnetometer was moved to an outdoor location and a specialized enclosure was built. An accessory temperature controller was included to maintain a constant temperature and digital link was created to ferry the recorded data back into the laboratory.....
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This is probably the simplest Circuit to test a Servo, This circuit tests the speed of servo. Here we use potentiometer to controll the speed of the servo. By applying very less voltage like 4. 5V and reducing the pot value, you can also adjust the position....
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The interest for circuits of tubes, remains big. Thus I will give completed in enough big degree, circuit of preamplifier. It is mainly constituted by the department of main preamplifier, the department of input selector, delay of application voltage and....
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LTC1043 can be .png">induced through any of its current shunt supply rails. Many cells and solar system applications..
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The circuit is designed to operate at 25 kHz. The data stream turns the 2N4401 hard on or off depending upon the coded state. This in turn switches the series infrared LEDs on and off. The receiver circuit consists of a three stage amplifier with photo....
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RT9179CB use power management chip power supply circuit Shown the way for the introduction of RT9179 ..
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CI and LI resonate on the 1750 meter band, with coverage from 150 kHz to 500 kHz. LI can be slug-tuned for 160-to-190 kHz coverage alone or a 2.5 mH choke can be used for LI, if desired, using CI for tuning. A 1N270 germanium diode rectifies the RF signal....
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When wired to a ten-digit keypad, the circuit will recognize one 4 digit combination out of a possible 5040 codes. When the programmed four-digit combination is entered from the keypad, in proper sequence, LOCK turns on and Lock Status turns off. The lock....
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This self-powered circuit converts MIDI clocks to DIN sync24. This type of clock is used on old Roland gear and provides a 24 pulses per quarter note clock and a start/stop signal...
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This is a discussion on Headlamp dimmer controlled foglamps within the Ford Raptor Lighting Modifications Forum forums, part of the Ford Raptor Forums - Modifications category! For those of you wanting to install fog lamps and would like to have them....
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I am interested in building a solid state control for my Warn 8274 self recovery winch. The current control scheme uses 4 constant duty 200 amp solenoids. 2 switched in parallel to connect the field 1 terminal on the motor to the armature for power in, and....
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Solar/battery powered FSK transmiter regarding power supply section, including battery management. My main goal is to charge battery and supply power to the transmitter over day via solar cells and use battery over night and during low light periods. Since I....
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Hey everybody! I`m working on a Singing Tesla Coil for a 4-H electricity project and I just finished my first draft of the circuitry. I was wondering....
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This interface became a standard to almost all operating systems we know today. IDEfile is a ProFile compatible hard drive for Apple /// and Lisa systems. Emulation of the classic 5MB ProFile and the rare ProFile 10M is provided. I intend to support....
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The following circuit shows about 40 MHZ/400 MHZ Frequency Counter Circuit Diagram. This circuit based on the PIC16F84 IC. Features: with ....
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Here is another example of using a CD4051 multiplexer, or more accurately a pair of CD4051s in parallel. I had lifted much of the core logic and circuits from Dave Jones designs. Again these are old designs offered from a historical perspective. I built this....
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Another very simple audio preamp to build. all parts should be available at your very local electronics shop...
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The second gate (G2) of a MOSFET can be used to incorporate a crystal oscillator into the same stage as a frequency mixer. Although old hat with tubes, this scheme is seldom seen in dual-gate MOSFET circuitry. L3, 03, and XI form the crystal oscillator, and....
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The first stage is a simple buffer used to isolate the signal source from the attenuator stages to follow. Each of the subsequent stages is preceded by a voltage divider formed by two resistors and CMOS switch. Provided that the CMOS switch for each stage....
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This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or....
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This compact tester checks cables for open-circuit or short-circuit conditions. A differential transistor pair at one end of each cable line remains balanced as long as the same clock pulse generated by timer IC appears at both ends of the line. ..
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SI is external key switch. The alarm allows a 0- to 45-s delay after SI is operated before the circuit is armed. During this per..
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Circuit transistor tester is a fairly simple circuit tester. Transistor tester circuit shown below can be used to measure and know the pins and determine the condition of the transistor. In addition this circuit transistor tester can also find out what kind....
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The timed two-voltage circuit can start and run a small de motor or solenoid. The input voltage to the LM317 three-terminal regulator ranges from 5 to 40 V, and the output voltage can range from 2 to 36 V. ..
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That circuit uses the MSM6322GSK which is only available in small 24 pin plastic SOP style package. A speech pitch converter IC that operates in real time and requires very few external components. It has a microphone preamplifier and line level input and....
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Here is the circuit diagram of an adjustable voltage regulator using IC L200. L200 is a monolithic integrated adjustable voltage regulator IC having features like current limiting, thermal shut down, power limiting, input over voltage protection etc. Here....
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The circuit incorporates two oscillators, both operating at about 40kHz. The first, IC1a, is a standard CMOS oscillator with its frequency adjustable via VR1. The frequency of the second, IC1b, is highly dependent on the inductance of coil L1, so that its....
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Time delays from 0 milliseconds to over three minutes are possible with this circuit without using a tantalum or electrolytic capacitor. The timing interval is initiated by applying power to the circuit. At the end of the timing interval, which is determined....
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Here the schematic diagram of 100W Inverter Circuit which will convert 12VDC input to be 220VAC output. The circuit built based IC CD4047 to generate sine wave signal 50Hz and then the power transistor 2N3055 will boost the signal so that the signal have....
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Using LM 3909 LED flasher IC, can be designed various electronic projects. As you can see in this circuit diagram, using the LM3909 LED flasher IC can be designed a very simple color organ. All of three active filters drives the audio spectrum into three....
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Wien bridge oscillator is an audio frequency sine wave oscillator of high stability and simplicity. Before that let us see what is oscillator An oscillator is a circuit that produces periodic electric signals such as sine wave or square wave. The application....
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Here the circuit diagram of simple and easy made battery level indicator. In general, in mobile phones, the battery levels is displayed in dot or bar style. This helps you to effortlessly acknowledge the battery level. On this page we provi....
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Capacitor Cl and body capacitance (C2>of the operator form the voltage divider from the hot side of the ac line to ground. The voltage across Cl is determined by the ratio of Cl to C2. The higher voltage is developed across the smaller capacitor. When no one....
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The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3. 0 License. Code samples in the reference are released into the public domain. ..
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Time to learn by example. This tutorial will take you through all steps in creating a discrete sound emulation for Phoenix. You will learn how to interface the discrete sound code to the driver, and how the schematic is transcribed into discrete code. With....
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Q1 and Q2. to form a table, on the left side, list the the four possible states of Q1, Q2; on the right side, write the values that Q1 and Q2 will assume after the next clock pulse. The table will then contain a complete description of the state machine.....
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The most commonly used LCDs found in the market today are 1 Line, 2 Line or 4 Line LCDs which have only one controller and support at most 80 characters, whereas LCDs supporting more than 80 characters make use of 2 HD44780 controllers. Apart from displaying....
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A number of simple FM devices, (without the use of a crystal) and showed how the power and frequency depends on a number of factors including the voltage of the supply and the design of the stages. The broad term given to the oscillator stage of these....
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This circuit will light a lamp at a remote location when the doorbell switch is pressed. This circuit should only be used with the solenoid type doorbells, the electronic type that play tunes will not work here. It is quite easy to miss the sound of a....
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A box full of Geissler tubes and a Ruhmkorff coil. He said his grandfather built the tubes by blowing the glass around 1900, more than one century ago! He wanted to see if the tube still worked, but a first attempt of powering them with the original....