Top Circuits Page 262
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This Wien bridge oscillator uses incandescent lamp to stabilize its amplitude. This amplitude stabilization gives a low distortion output. Multiple frequency....
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This is a 220V Touch Switch circuit. This circuit is used as switch which turn off and turn on the the electronic device that is connected to the 220V home....
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Good/Bad transistor tester means that this instrument can only determine if the transistor is good or bad, nothing more. Any transistor with gain equal to 30....
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Noise, in amplifier circuit, is generated intrinsically by each components inside the circuit. Resistor, capacitor, and semiconductor generate noises. By....
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Buffering for the zener is provided by the impedance matching and current amplifying characteristics of the emitter follower and draw less current from it. To....
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This is a Turbo Bass circuit. Using this circuit, the low frequency sound signals(bass) can be multiplied. This circuit is an active circuit. The first op-amp....
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Diode and capacitor can be used to clamp an AC signal, shift the level into positive region for all cycle. Sometimes this condition is needed, to have positive....
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Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory....
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In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For....
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This is a The Directly (DC) Coupled Amplifier circuit. This circuit is built from NPN transistor and PNP transistor. This circuit is used to amplify a DC....
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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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As far as AC is concerned, the base is connected to the ground by the C3. Therefore, both input and output are connected to the base (common base amplifier)....
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This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
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The silicon controlled rectifier (S.C.R.) is called as the thyristor. It is like a diode, when the cathode is negative with respect to the anode, the current....
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The circuit below is configured as a comparator. A fixed reference voltage at the non inverting input is provided by R1 and R2. The inverting input voltage is....
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A pulse counter can be built by using 7490 decode counter and 7557A. This circuit can count from zero to 9. Pins 3 and 2 of all 7490`s must be connected....
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Using only two active components, we can build an AM radio receiver working on MW (Medium Wave) Band. The circuit uses straight receiver configuration, where....
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This is a linear FM detector circuit. This circuit usually is used in telemetry applications and wide range of analog communications. The main part of this....
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This is a Peak Voltmeter circuit. This circuit can be viewed as a pulse stretcher, which catch fast pulse signal to be measured by a slow response voltmeter....
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The circuit shown in the schematic diagram below is an isolated dc-to-dc step up converter. Being isolated means that there is no electrical connection between....
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A simple way to build a battery-powered RS-232 receiver circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level....
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As long as we have a stable voltage reference, a stable voltage source can be produced by amplifying the reference. LM10 provide both the reference and the....
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Current regulator acts like a load when connected to a voltage source, or in series between voltage source and real load. The main characteristic of a current....
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The UHF motion detector below operates on the Doppler radar principle. A radial signal is created by the oscillator (Q1). Some of this energy is reflected back....
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Current loop transmitter is the term associated with sensor system that is used in industrial 4-20mA current loop technology. This transmitter contain the....
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This is a 100MHz Varicap Oscillator circuit. This circuit can provide modulation signals less than 28V and frequency deviation of 28 MHz peak-to-peak. This....
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This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra....
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This pyrometer is used to measure an incandescent body. The principle for this measurement is that the hotter the body, the spectrum of the radiation will....
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There are many measurement system that would be more suitable if we use logarithmic scale, especially when we try to mimics human sensory response. Most....
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Ideally, any testing equipment will not draw any current from the device under test. This ideal condition can be approximated by designing a testing device....
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Below is the schematic diagram of an audio input module. We can produce a DC output voltage that is proportional to the input signal amplitude (the signal....
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Using this circuit, we can accept positive or negative or differential control voltages. When the control voltage is zero, the output frequency is zero. To....
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Current loop analog data transmission is used in industrial environment because of its robustness (good noise immunity), while providing wiring fault detection....
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If you need to hold an analog signal for infinite period then this digital sample and hold circuit is the solution. This circuit uses a Exar XR-2240 programmable timer/counter as main component. The Exar XR-2240 is triggered when strobe input is applied. The....
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Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low....
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Closed loop or servo system has the ability to stabilize the controlled plant at a specified operating condition. The plant, the controlled sub-system, can be....
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This is a coincidence detector circuit. This circuit is very useful for monitoring complex logic circuits. This circuit has two inputs, A and B. if A and B are....
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Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)....
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This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The....
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Notch filter is a filter that remove a certain B. Ideally a notch filter will remove only single point of frequency component, but practically it will remove....
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This is a metal locator circuit. This circuit is useful to detect metal. This circuit uses a AM radio and one-transistor oscillator. This circuit is....
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Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One....
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This is a Wien-bridge sine-wave oscillator circuit. This circuit uses negative-feedback stabilization to make sure the gain won`t go higher than unity to....
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This is a battery tester circuit.This circuit is used to indicate whether the level of a battery voltage is normal, under-voltage, or over-voltage, very....
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Video switch is required to mux/multiplex several video sources, enable multiple camera to be displayed subsequently on a single monitor. This multiplexing....
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A circuit of low-power switching regulator is shown in the schematic diagram below. This circuit can give output voltage of 5V from 9-V source. The efficiency....
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This is a Portable light-level meter circuit with five-decade dynamic range. This uses a single cell battery as the power supply. To calibrate this circuit,....
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This is a schematic diagram of general-purpose audio frequency (AF) amplifier circuit. This circuit uses cheap 1/4-W resistors, no high precision needed so....
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The idea of a color organ is that any sound, including musical sound, can be transformed into light. As stated by wave theory, both music and light have....
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This is a circuit of Low-Light Level Drop Detector. This circuit utilize self-biasing configuration to detect small changes in light level. This circuit....
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This is a 28VDC to 5VDC switching converter circuit. As a switch-mode voltage regulator, this circuit gives higher efficiency than linear regulator type....
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A flip-flop that generates two unstable states (high-low) is called astable multivibrator, a fancy name for you to say it`s an oscillator. The very basic of....
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VCO (voltage controlled oscillator) is an electronic signal generator which produce a signal that has variable frequency depends on a voltage level at its....
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This is a switching circuit that provide latching mechanism to make a set of radio buttons using push buttons. This circuit consist of interlocking circuit....
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This is a pulse stretcher circuit using optocoupler. This circuit uses a 4N26 opto-coupler combined with a standard one-shot circuitry. This circuit is....
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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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This is a three-modes lamp dimmer circuit with touch control. This circuit can be used to control a lamp in 3 operation modes: dim, off, and bright. A NE555....
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This LM10 circuit can be used as low voltage low current voltage source or reference. This circuit regulate the voltage from the power supply to give a very....
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This is a schematic diagram of a three-phase pulse generator circuit. This circuit produce 3 phase overlapped output similar with 3 phase AC powerline, you....
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A switching voltage regulator circuit shown in the schematic diagram here can be a low cost solution for your high efficiency requirement electronic circuit....
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This is an astable multivibrator (oscillator) circuit using CMOS inverter. This circuit uses CD4007 or MC14007. This circuit has operating frequency range of....
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This is a quartz-stabilized oscillator circuit with electronic gain control. Replacing the common filament lamp for amplitude stabilization, this circuit use....
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Unlike other alarm circuit that provide normally-open only or normally-closed only configuration, this alarm circuit work for both configurations. The....
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This is a circuit of phone message flasher, an alternative way to get alarmed when there is an incoming call. When the phone rings, high line voltage will be....
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Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit....
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This temporary lamp circuit is very helpful in emergency situation or in any application where we don`t have much time to turn off the lamp. Just press the....
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This low-cost logarithmic converter is built using op-amp and transistor. This circuit uses a Motorola MC1539G op-amp which is connected to PNP transistor. To....
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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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Tone control circuit is an electronic circuit which is designed to manipulate the tone of audio signal. Tone of audio signal is analog to color in light. We....
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The circuit shown in this schematic diagram is a square-wave oscillator circuit. The main component of this oscillator circuit is LP165/365 comparator. As....
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Simple voltage probe circuit shown in the schematic diagram below very useful in testing, testing, or troubleshooting discrete or integrated circuits,....
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The following schematic diagram shown a conventional which is modified to become a VCO (voltage-controlled oscillator) circuit. By replacing the conventional fixed capacitor with a variable capacitance diode (varactor), we can turn a 74S124 multivibrator....
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This is a remote on-off switch circuit. With this circuit, we can take the benefit of using small switch to control larger AC current from high power devices....
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A normal 9V battery would be considered as dead battery when the voltage falls below 7 Volts. With this switching regulator, a lifetime of a 9V battery will....
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The frequency to voltage converter circuit illustrated in the schematic diagram below produces a 10 V output for 10 kHz full scale input (square waves or pulses). The simplicity of the circuit doesn`t mean a bad performance: this circuit has linearity about....
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Configured with capacitive coupling (by inserting a small cap between photo-transistor and bipolar transistor), this relay circuit will respond only to rapid....
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A pair of cross-coupled SCRs can be used to build a first-response monitor circuit, as shown in the schematic diagram below. First-response circuit is....
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Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself might employs different....
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A vibration meter circuit shown in the following schematic diagram uses LM3915 a the main active component. This vibration meter uses a piezoelectric....
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555 IC is very popular component for timer circuit. With integrator circuit, we can extend the timing period of 555IC timer with reasonable capacitor size....
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This AM radio circuit is a low power transmitter working on broadcast band. The simplicity is implemented using a single-transistor amplifier stage, and for....
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To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD....
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Automatic headlight dimmer circuit diagram for your car`s headlight, keep you safe with maximum bright for farthest visibility, but will automatically switch....
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This LED flasher circuit uses 555 IC, and is capable of driving up to LEDs. The good news is, the use of multiple LEDs in series doesn`t increase the power....
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The circuit shown in the following schematic diagram is a simple spectrum analyzer adapter circuit for oscilloscopes. This circuit can be used for scanning or....
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The following two-transistor circuit is a pre-amplifier circuit for magnetic phono cartridge, which is characterized by its frequency response defined by RIAA standard for phono recording. This pre amp circuit has gain around 40 dB (midband) at 1 kHz. Here....
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The following touch switch circuit uses a CA3240 dual BiMOS op amp to sense small currents flowing between the contact points on a touch plate. Since this....
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Circuit described in the schematic diagram below can achieve 99% modulation easily with maximum frequency of 200kHz. The amplification of this circuit can be....
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This bi-stable circuit uses an op-amp, acts similar with RS flip-flop. Bi-stable circuit is a circuit with two stable states, low and remain low until set is....
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A one shot multivibrator generate a fixed width pulse at the output when the input is triggered. This fixed width output should be consistent, regardless the....
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As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs. Like other flasher circuit, this circuit alternately switch the....
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This is a supply voltage monitor circuit, an indicator to show if the power supply is in good condition. Designed using the IC 555 timer, this circuit will....
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Gain adjustment will be more flexible if it controlled by a voltage signal, since we can use many methods to provide user interface. We can control it by a....
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A symmetrical, mV peak to peak triangle waveform can be generated by the circuit depicted in the following schematic diagram. This circuit is featured with....
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This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp....
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Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate....
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One shot multivibrator circuit is also known as monostable multivibrator or timer. The function of such circuit is simply produce a pulse strobe with a fixed....
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The following voltage to frequency converter (V/FC - VCO) circuit consist of a UJT (uni-junction transistor) oscillator in which the timing charge capacitor C2....
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Opening car`s door is very simple activity, and off course it`s just a daily activity which require no special skill. Almost nothing can go wrong, but....
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Sometimes the output volume of amplifier is too high and hurts our ears. As well as hurting your ears, this incident could damage your loudspeaker. The circuit....
This Wien bridge oscillator uses incandescent lamp to stabilize its amplitude. This amplitude stabilization gives a low distortion output. Multiple frequency....
This is a 220V Touch Switch circuit. This circuit is used as switch which turn off and turn on the the electronic device that is connected to the 220V home....
Good/Bad transistor tester means that this instrument can only determine if the transistor is good or bad, nothing more. Any transistor with gain equal to 30....
Noise, in amplifier circuit, is generated intrinsically by each components inside the circuit. Resistor, capacitor, and semiconductor generate noises. By....
Buffering for the zener is provided by the impedance matching and current amplifying characteristics of the emitter follower and draw less current from it. To....
This is a Turbo Bass circuit. Using this circuit, the low frequency sound signals(bass) can be multiplied. This circuit is an active circuit. The first op-amp....
Diode and capacitor can be used to clamp an AC signal, shift the level into positive region for all cycle. Sometimes this condition is needed, to have positive....
Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory....
In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For....
This is a The Directly (DC) Coupled Amplifier circuit. This circuit is built from NPN transistor and PNP transistor. This circuit is used to amplify a DC....
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....
As far as AC is concerned, the base is connected to the ground by the C3. Therefore, both input and output are connected to the base (common base amplifier)....
This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
The silicon controlled rectifier (S.C.R.) is called as the thyristor. It is like a diode, when the cathode is negative with respect to the anode, the current....
The circuit below is configured as a comparator. A fixed reference voltage at the non inverting input is provided by R1 and R2. The inverting input voltage is....
A pulse counter can be built by using 7490 decode counter and 7557A. This circuit can count from zero to 9. Pins 3 and 2 of all 7490`s must be connected....
Using only two active components, we can build an AM radio receiver working on MW (Medium Wave) Band. The circuit uses straight receiver configuration, where....
This is a linear FM detector circuit. This circuit usually is used in telemetry applications and wide range of analog communications. The main part of this....
This is a Peak Voltmeter circuit. This circuit can be viewed as a pulse stretcher, which catch fast pulse signal to be measured by a slow response voltmeter....
The circuit shown in the schematic diagram below is an isolated dc-to-dc step up converter. Being isolated means that there is no electrical connection between....
A simple way to build a battery-powered RS-232 receiver circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level....
As long as we have a stable voltage reference, a stable voltage source can be produced by amplifying the reference. LM10 provide both the reference and the....
Current regulator acts like a load when connected to a voltage source, or in series between voltage source and real load. The main characteristic of a current....
The UHF motion detector below operates on the Doppler radar principle. A radial signal is created by the oscillator (Q1). Some of this energy is reflected back....
Current loop transmitter is the term associated with sensor system that is used in industrial 4-20mA current loop technology. This transmitter contain the....
This is a 100MHz Varicap Oscillator circuit. This circuit can provide modulation signals less than 28V and frequency deviation of 28 MHz peak-to-peak. This....
This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra....
This pyrometer is used to measure an incandescent body. The principle for this measurement is that the hotter the body, the spectrum of the radiation will....
There are many measurement system that would be more suitable if we use logarithmic scale, especially when we try to mimics human sensory response. Most....
Ideally, any testing equipment will not draw any current from the device under test. This ideal condition can be approximated by designing a testing device....
Below is the schematic diagram of an audio input module. We can produce a DC output voltage that is proportional to the input signal amplitude (the signal....
Using this circuit, we can accept positive or negative or differential control voltages. When the control voltage is zero, the output frequency is zero. To....
Current loop analog data transmission is used in industrial environment because of its robustness (good noise immunity), while providing wiring fault detection....
If you need to hold an analog signal for infinite period then this digital sample and hold circuit is the solution. This circuit uses a Exar XR-2240 programmable timer/counter as main component. The Exar XR-2240 is triggered when strobe input is applied. The....
Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low....
Closed loop or servo system has the ability to stabilize the controlled plant at a specified operating condition. The plant, the controlled sub-system, can be....
This is a coincidence detector circuit. This circuit is very useful for monitoring complex logic circuits. This circuit has two inputs, A and B. if A and B are....
Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)....
This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The....
Notch filter is a filter that remove a certain B. Ideally a notch filter will remove only single point of frequency component, but practically it will remove....
This is a metal locator circuit. This circuit is useful to detect metal. This circuit uses a AM radio and one-transistor oscillator. This circuit is....
Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One....
This is a Wien-bridge sine-wave oscillator circuit. This circuit uses negative-feedback stabilization to make sure the gain won`t go higher than unity to....
This is a battery tester circuit.This circuit is used to indicate whether the level of a battery voltage is normal, under-voltage, or over-voltage, very....
Video switch is required to mux/multiplex several video sources, enable multiple camera to be displayed subsequently on a single monitor. This multiplexing....
A circuit of low-power switching regulator is shown in the schematic diagram below. This circuit can give output voltage of 5V from 9-V source. The efficiency....
This is a Portable light-level meter circuit with five-decade dynamic range. This uses a single cell battery as the power supply. To calibrate this circuit,....
This is a schematic diagram of general-purpose audio frequency (AF) amplifier circuit. This circuit uses cheap 1/4-W resistors, no high precision needed so....
The idea of a color organ is that any sound, including musical sound, can be transformed into light. As stated by wave theory, both music and light have....
This is a circuit of Low-Light Level Drop Detector. This circuit utilize self-biasing configuration to detect small changes in light level. This circuit....
This is a 28VDC to 5VDC switching converter circuit. As a switch-mode voltage regulator, this circuit gives higher efficiency than linear regulator type....
A flip-flop that generates two unstable states (high-low) is called astable multivibrator, a fancy name for you to say it`s an oscillator. The very basic of....
VCO (voltage controlled oscillator) is an electronic signal generator which produce a signal that has variable frequency depends on a voltage level at its....
This is a switching circuit that provide latching mechanism to make a set of radio buttons using push buttons. This circuit consist of interlocking circuit....
This is a pulse stretcher circuit using optocoupler. This circuit uses a 4N26 opto-coupler combined with a standard one-shot circuitry. This circuit is....
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....
This is a three-modes lamp dimmer circuit with touch control. This circuit can be used to control a lamp in 3 operation modes: dim, off, and bright. A NE555....
This LM10 circuit can be used as low voltage low current voltage source or reference. This circuit regulate the voltage from the power supply to give a very....
This is a schematic diagram of a three-phase pulse generator circuit. This circuit produce 3 phase overlapped output similar with 3 phase AC powerline, you....
A switching voltage regulator circuit shown in the schematic diagram here can be a low cost solution for your high efficiency requirement electronic circuit....
This is an astable multivibrator (oscillator) circuit using CMOS inverter. This circuit uses CD4007 or MC14007. This circuit has operating frequency range of....
This is a quartz-stabilized oscillator circuit with electronic gain control. Replacing the common filament lamp for amplitude stabilization, this circuit use....
Unlike other alarm circuit that provide normally-open only or normally-closed only configuration, this alarm circuit work for both configurations. The....
This is a circuit of phone message flasher, an alternative way to get alarmed when there is an incoming call. When the phone rings, high line voltage will be....
Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit....
This temporary lamp circuit is very helpful in emergency situation or in any application where we don`t have much time to turn off the lamp. Just press the....
This low-cost logarithmic converter is built using op-amp and transistor. This circuit uses a Motorola MC1539G op-amp which is connected to PNP transistor. To....
This intercom circuit suitable for accompanying door bell. This circuit uses the speakers both as microphones and as loudspeaker. This intercom is made....
Tone control circuit is an electronic circuit which is designed to manipulate the tone of audio signal. Tone of audio signal is analog to color in light. We....
The circuit shown in this schematic diagram is a square-wave oscillator circuit. The main component of this oscillator circuit is LP165/365 comparator. As....
Simple voltage probe circuit shown in the schematic diagram below very useful in testing, testing, or troubleshooting discrete or integrated circuits,....
The following schematic diagram shown a conventional which is modified to become a VCO (voltage-controlled oscillator) circuit. By replacing the conventional fixed capacitor with a variable capacitance diode (varactor), we can turn a 74S124 multivibrator....
This is a remote on-off switch circuit. With this circuit, we can take the benefit of using small switch to control larger AC current from high power devices....
A normal 9V battery would be considered as dead battery when the voltage falls below 7 Volts. With this switching regulator, a lifetime of a 9V battery will....
The frequency to voltage converter circuit illustrated in the schematic diagram below produces a 10 V output for 10 kHz full scale input (square waves or pulses). The simplicity of the circuit doesn`t mean a bad performance: this circuit has linearity about....
Configured with capacitive coupling (by inserting a small cap between photo-transistor and bipolar transistor), this relay circuit will respond only to rapid....
A pair of cross-coupled SCRs can be used to build a first-response monitor circuit, as shown in the schematic diagram below. First-response circuit is....
Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself might employs different....
A vibration meter circuit shown in the following schematic diagram uses LM3915 a the main active component. This vibration meter uses a piezoelectric....
555 IC is very popular component for timer circuit. With integrator circuit, we can extend the timing period of 555IC timer with reasonable capacitor size....
This AM radio circuit is a low power transmitter working on broadcast band. The simplicity is implemented using a single-transistor amplifier stage, and for....
To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD....
Automatic headlight dimmer circuit diagram for your car`s headlight, keep you safe with maximum bright for farthest visibility, but will automatically switch....
This LED flasher circuit uses 555 IC, and is capable of driving up to LEDs. The good news is, the use of multiple LEDs in series doesn`t increase the power....
The circuit shown in the following schematic diagram is a simple spectrum analyzer adapter circuit for oscilloscopes. This circuit can be used for scanning or....
The following two-transistor circuit is a pre-amplifier circuit for magnetic phono cartridge, which is characterized by its frequency response defined by RIAA standard for phono recording. This pre amp circuit has gain around 40 dB (midband) at 1 kHz. Here....
The following touch switch circuit uses a CA3240 dual BiMOS op amp to sense small currents flowing between the contact points on a touch plate. Since this....
Circuit described in the schematic diagram below can achieve 99% modulation easily with maximum frequency of 200kHz. The amplification of this circuit can be....
This bi-stable circuit uses an op-amp, acts similar with RS flip-flop. Bi-stable circuit is a circuit with two stable states, low and remain low until set is....
A one shot multivibrator generate a fixed width pulse at the output when the input is triggered. This fixed width output should be consistent, regardless the....
As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs. Like other flasher circuit, this circuit alternately switch the....
This is a supply voltage monitor circuit, an indicator to show if the power supply is in good condition. Designed using the IC 555 timer, this circuit will....
Gain adjustment will be more flexible if it controlled by a voltage signal, since we can use many methods to provide user interface. We can control it by a....
A symmetrical, mV peak to peak triangle waveform can be generated by the circuit depicted in the following schematic diagram. This circuit is featured with....
This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp....
Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate....
One shot multivibrator circuit is also known as monostable multivibrator or timer. The function of such circuit is simply produce a pulse strobe with a fixed....
The following voltage to frequency converter (V/FC - VCO) circuit consist of a UJT (uni-junction transistor) oscillator in which the timing charge capacitor C2....
Opening car`s door is very simple activity, and off course it`s just a daily activity which require no special skill. Almost nothing can go wrong, but....
Sometimes the output volume of amplifier is too high and hurts our ears. As well as hurting your ears, this incident could damage your loudspeaker. The circuit....