Top Circuits Page 261
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The size of the photoflash charger circuit is greatly simplified and reduced by Texas Instrument (TI) TPS65552A. A photoflash capacitor charger based on this....
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The following circuit diagram is a simplified application circuit of the TDA8932B/33(B) device when operated from an asymmetrical supply (single supply)....
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Sometimes, in linear equipment design, it`s necessary to take a voltage which is referred to some dc level and generate an amplified output which is referred....
-
Two reasons why LM101 is well suited to comparator applications are it has a large differential input voltage range and the output is easily clamped to make it....
-
We can also operate TDA8932B/33(B) from a symmetrical supply. On this diagram, three half supply voltage buffers are disabled. When supplied from a symmetrical....
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This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give....
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Differential temperature sensor is used to measure temperature difference in two different area. Here is the schematic diagram of the circuit: Please note....
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LM135/235/335 temperature sensor is designed ease absolute temperature reading, giving all positive value for any frequency, that`s why we read 2.7315V at 0....
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This temperature controller employs an LM135/235/335 temperature sensor, can be used to keep small environment warm or hot. Here is the schematic diagram:....
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The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,....
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This is a simple circuit of Positive Voltage Doubler. This circuit uses the MAX1044/ICL7660. The schottky diode was chosen to reduces the voltage drop. This....
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This is a circuit of difference amplifier. This circuit is an inverting amplifier that allows the subtraction of two voltages and that is the summing....
-
This is a differentiator circuit. This circuit can be used to do differential operation. There are two differentiator, the are true differentiator and....
-
This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing....
-
On the circuit diagram below show us a schematic which is used to set the speed of a low-power induction motor, such as those which can be found in fan....
-
The MAXQ3210 ia a powerful RISC microcontroller. This device have features and capabilities to make it compatible for battery-powered applications that detect....
-
LVDT (linear voltage differential transformer) is widely used as linear position sensor. AD589 integrated circuit provides a complete solution for LVDT....
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Voltage-controlled oscillator (VCO) is an oscillator that its frequency is controlled using a voltage signal. The VCO described here provide both triangular and square wave output. The control voltage can be varied between 5 mV to 5 V, to produce oscillation....
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Square wave tone bursts is provided by depressing the pushbutton. It`s duration depends on the duration for which the voltage at Pin 4 exceeds a threshold....
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Pulses are received by the timer from the distributor points. When the timer output is high, Meter M receives a calibrated current through R6. The meter don`t....
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Crystal oscillator, especially the low frequency one, can be easily implemented using op-amp as the amplifier. Here is the schematic diagram of such circuit:....
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This is a Driving Relay circuit using 555 IC. The circuit is used to drive a relay to avoid 555 hangs up, it uses an inductive feedback. The coil is prevented....
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In many electronics-level adjustments such as LED drivers for LCD panel backlight controls, we can use AD5228. A manually adjustable LED driver is shown on....
-
We can use the 555 timer to hold the cost down of adding a triggered sweep to an economy oscilloscope. The timer is triggered by the circuit`s input op amp,....
-
Squarer circuit is used to shape signal, to get more defined square wave. This circuit is useful to make convert the signal so it has very fast rise time. Here....
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LM111 comparator can be used o design a relay driver with TTL strobe, this can be used to provide more control of your relay driver. You can control the strobe....
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An excellent tone burst generator can be made using 556 Dual Timer. We can connect the first half as a one-shot and the second half as an oscillator. The....
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Low voltage reference is important to provide offset source or biasing, or just a reference for comparator, and its adjustable feature should suit this circuit....
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Today, simplicity and minimum controls is required for design of a handheld device. It will be very useful if a circuit allow us to turn the power on or of....
-
To sense and control the current in stepping motors and other similar devices, we can use a linear integrated circuit like L6506. The chip set forms a constant....
-
This is an Automatic LCD Panel Backlight Control circuit. This is a simple low cost implementation of an LED controller. It can compensate for aging effects....
-
LM134 makes a good temperature sensor because it has a highly linear output characteristic. Because it is a current output device and is therefore not affected....
-
The heart of an average reading, rms calibrated AC voltmeter is shown in figure below. It`s a rectifier and averaging filter. We can remove the averaging function and provide a precision full-wave rectifier by deleting C2 and provide an absolute value....
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DC drive for a Universal motor is shown in figure below. In order to supply DC current to the motor, a diode bridge has been added around the motor. The motor....
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This is a Sine Wave Oscillator circuit. This circuit as known as amplitude-stabilized sine-wave oscillator. It can gives high purity sine-wave output down to....
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Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the....
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We can use ISL97676 as a LED driver that drives 6 channels of LED current for TFT-Display. The ISL97676 is used to drive 6 channels of LED to support 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias supply on the....
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This is a Low-dropout (LDO) Regulator circuit, constructed by using only a single PNP transistor. This circuit is directly related to load current. At very low....
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Basically, this circuit is a radio frequency (RF) oscillator that operates around 100 MHz. The audio which is picked up and amplified by the electret....
-
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to....
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The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V....
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This is Single Cell LED Flashlight circuit. This circuit uses white LED that has best power-efficiency combination at about 20mA and requires abut 3.3V. Each....
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Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of ....
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We can use the circuit below to maintain the level of water in the header tank within prescribed limits. A 3HP submersible bore pump which has a high starting....
-
All types of transistors including Darlington and power will be tested in this project. Connect the 9v battery around the other way at points A and B to test....
-
Using circuit below, we can animate the bike turning signal using LED. The bike turning signal will blink from the right side (D1) to the left side (D5) in a....
-
The output of this circuit is push-pull and consumes less than 3mA (with no signal) but drives the earpiece to a very loud level when audio is detected....
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This is aquiz bell/alarm circuit. This circuit indicate fastest finger first . This circuit has one bulb for Quiz master and one for each contestant. The bulb will illuminate when a button is pressed. the cathode of the 9v1 zener sees approx mid-rail....
-
This is a voltage multiplier circuit. First circuit is used to double the a square wave (any amplitude). However there is minus about 2v losses in base-emitter....
-
This is a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must....
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This is flashing LED circuit emulate the turning of incandescent lamp. The characteristic of incandescent lamp is that they can`t abruptly change the....
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The circuit below consists of two multivibrators. The first multivibrator provides the speed of the change from `hee` to `haw` and operates at a low frequency....
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Dynamic microphone uses a moving coil around magnetic field to convert mechanical movement into electrical signal. The ordinary mini speaker is turned into a....
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When the microphone detects a loud sound, this circuit will turn the LED on. The `charge-pump` section consists of the 100n, 10k, signal diode and uF....
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The circuit below consists of two twin-T oscillators set to a point below oscillation. To set the circuit into oscillation, we can touch the Touch Pad. Here is the schematic diagram of the circuit: By touching the pads in different ways and a whole range....
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Below is a Courtesy Light Extender for cars. When a door is closed in a car, it extends the ON time, so the passenger can see where he/she is sitting. Here is....
-
A 40 watt fluorescent (tube lamp, TL) or two 20-watt tubes in series will be driven by this circuit. The transformer is wound on a ferrite rod 10mm dia and 8cm....
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A 40 watt fluorescent tube lamp or two 20-watt tubes in series will be driven by this circuit but this circuit will produce less brightness than usual, since....
-
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....
-
This is a temperature indication and control system using the AD596/AD597. In this system, AD596/AD597 is used as a closed-loop thermocouple signal conditioner....
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This is a buffer circuit for TMP01 Temperature Sensor. The output of this sensor is a low impedance dc output voltage with a 5 mV/K temperature coefficient....
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This is a TMP01 Temperature Sensor Transmitter circuit. This circuit is used in industrial environments to transmit the signal differentially on a wire pair....
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This is a TMP01 Temperature-to-Frequency Converter circuit. Converting voltage to the frequency domain is another common method of transmitting analog....
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The schematic diagram described here is a TMP01 Celsius Scale Temperature Sensor circuit. This circuit is used to convert the VPTAT output voltage that is....
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This schematic diagram is about TMP01 Fahrenheit Scale Temperature Sensor circuit. This circuit is used to convert VPTAT into an output that can be read....
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Schematic diagram below shows an ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that can be used to regulate an output with a load of more than 20 A. It can be done if he power components like MOSFETs, the bulk capacitors and the....
-
In personal electronics and computer audio system, the SSM2167 is a complete and flexible solution for conditioning microphone inputs. It is also very good for....
-
Flip-flop, as an astable multivibrator, can be used to generate timing signal in music: metronome. By adjusting transistor bias resistor using a 100k....
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This schematic diagram shows a water level sensor/detector/monitor circuit. An alarm is also featured in this circuit. Any fluid with a resistance under 900K....
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This schematic diagram below shows a 555 IC water level sensor/detector alarm circuit. This circuit is powered through the emitter current of the BC109C. 555 timer is used as astable oscillator in this circuit. When this circuit is under dry conditions the....
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Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal....
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The output of this circuit will be activated when a mix of two tone/frequency is detected on the input. The frequency f is determined by the values of R1 and....
-
This is infrared (IR) proximity detector circuit. A matched infrared emitter and detector pair is used in this circuit. The voltage controlled oscillator....
-
A schematic diagram of a micropower single-supply instrumentation amplifier circuit is shown below. This circuit only need 15µA of current and can give over....
-
Oscillator circuit is an electronic circuit that produce a periodic signal. The term quadrature refers to a fourth (1/4) phase shift of full wave cycle (1/4 of....
-
This is a schematic diagram of a micropower voltage-controlled oscillator circuit. This circuit can generate square and triangle wave outputs and only need....
-
Unique applications of 567 tone/frequency decoder IC? Here is one of them: pulse generator with 25% duty cycle (active factor). This signal generator produce....
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Precision oscillator can be built using quartz crystal, but with proper component selection, you can also build one with RC (resistor and capacitor) circuit....
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The ADM3251E is a transceiver which has a high speed, 2.5 kV fully isolated, single channel RS-232/V.28. This device is operates from a single 5 V power supply....
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AD8221 is an excellent candidate for bridge measurement because it has low offset and high CMRR over frequency. The bridge can be directly connected to the....
-
While traveling, charging of the mobile phone, cellphone battery is a big problem as power supply source is not generally accessible. Battery will go flat....
-
In conventional white LED design, the Max1916 low-dropout bias supply for white LEDs is a high performance alternative to the simple ballast resistors. A....
-
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically....
-
A very long time constant is provided by R1 and C1. C1 discharges and the near zero voltage at its positive lead is applied to the high impedance inputs of the....
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This is Fluid/Liquid/Water Level Control circuit using LM830. The LM830 can be used to detect absence and presence of aqueous fluids. This application uses two....
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This is a one transistor pump circuit. This is a very simple circuit and very helpful, you can use it as a building block for designing more complex electronic....
-
This is Hot Water Level Indicator circuit. This circuit can be used to monitor level of hot water in a tank. This circuit is simple and inexpensive. this....
-
Kids like the police or fire-brigade cars siren sound. This circuit can generate dual tone like Police or Fire-brigade cars siren sound. This circuit usually....
-
This is a TV Remote Control Jammer circuit. Remote control use modulated light to combat eer infrared nvironment/background infrared noise. Your room heater,....
-
This water level sensor (detector) circuit uses a standard NAND logic gate to produce oscillation and to detect the water level. Oscillation is included inside....
-
Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator....
-
Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many....
-
Every electronic device that boost electrical signal can be called an amplifier. The various amplifier types only differ in some specific features such as:....
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Usually, LED is powered by DC supply, but this circuit can make the LED can be powered by AC supply. This circuit can be used as power indicator for Water pump....
-
Current mode amplifier has the benefit of higher frequency operation, and LM359 comes as operational amplifier with this type op amplifier. Current mode....
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Analog meter normally doesn`t have high impedance since they don`t have buffer circuit inside. With active buffering, the input impedance of this circuit....
-
Photo-diode can be used for high speed digital transmission, but you have to provide high speed signal conditioner for that purpose. The amplifier circuit....
-
Voltage-to-frequency converter (VFC) circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function. This circuit....
-
This view is not far from wrong because the operation of FM detectors is widely regarded as mysterious. The ratio detector to find out how it works, without....
-
This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible....
The size of the photoflash charger circuit is greatly simplified and reduced by Texas Instrument (TI) TPS65552A. A photoflash capacitor charger based on this....
The following circuit diagram is a simplified application circuit of the TDA8932B/33(B) device when operated from an asymmetrical supply (single supply)....
Sometimes, in linear equipment design, it`s necessary to take a voltage which is referred to some dc level and generate an amplified output which is referred....
Two reasons why LM101 is well suited to comparator applications are it has a large differential input voltage range and the output is easily clamped to make it....
We can also operate TDA8932B/33(B) from a symmetrical supply. On this diagram, three half supply voltage buffers are disabled. When supplied from a symmetrical....
This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give....
Differential temperature sensor is used to measure temperature difference in two different area. Here is the schematic diagram of the circuit: Please note....
LM135/235/335 temperature sensor is designed ease absolute temperature reading, giving all positive value for any frequency, that`s why we read 2.7315V at 0....
This temperature controller employs an LM135/235/335 temperature sensor, can be used to keep small environment warm or hot. Here is the schematic diagram:....
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,....
This is a simple circuit of Positive Voltage Doubler. This circuit uses the MAX1044/ICL7660. The schottky diode was chosen to reduces the voltage drop. This....
This is a circuit of difference amplifier. This circuit is an inverting amplifier that allows the subtraction of two voltages and that is the summing....
This is a differentiator circuit. This circuit can be used to do differential operation. There are two differentiator, the are true differentiator and....
This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing....
On the circuit diagram below show us a schematic which is used to set the speed of a low-power induction motor, such as those which can be found in fan....
The MAXQ3210 ia a powerful RISC microcontroller. This device have features and capabilities to make it compatible for battery-powered applications that detect....
LVDT (linear voltage differential transformer) is widely used as linear position sensor. AD589 integrated circuit provides a complete solution for LVDT....
Voltage-controlled oscillator (VCO) is an oscillator that its frequency is controlled using a voltage signal. The VCO described here provide both triangular and square wave output. The control voltage can be varied between 5 mV to 5 V, to produce oscillation....
Square wave tone bursts is provided by depressing the pushbutton. It`s duration depends on the duration for which the voltage at Pin 4 exceeds a threshold....
Pulses are received by the timer from the distributor points. When the timer output is high, Meter M receives a calibrated current through R6. The meter don`t....
Crystal oscillator, especially the low frequency one, can be easily implemented using op-amp as the amplifier. Here is the schematic diagram of such circuit:....
This is a Driving Relay circuit using 555 IC. The circuit is used to drive a relay to avoid 555 hangs up, it uses an inductive feedback. The coil is prevented....
In many electronics-level adjustments such as LED drivers for LCD panel backlight controls, we can use AD5228. A manually adjustable LED driver is shown on....
We can use the 555 timer to hold the cost down of adding a triggered sweep to an economy oscilloscope. The timer is triggered by the circuit`s input op amp,....
Squarer circuit is used to shape signal, to get more defined square wave. This circuit is useful to make convert the signal so it has very fast rise time. Here....
LM111 comparator can be used o design a relay driver with TTL strobe, this can be used to provide more control of your relay driver. You can control the strobe....
An excellent tone burst generator can be made using 556 Dual Timer. We can connect the first half as a one-shot and the second half as an oscillator. The....
Low voltage reference is important to provide offset source or biasing, or just a reference for comparator, and its adjustable feature should suit this circuit....
Today, simplicity and minimum controls is required for design of a handheld device. It will be very useful if a circuit allow us to turn the power on or of....
To sense and control the current in stepping motors and other similar devices, we can use a linear integrated circuit like L6506. The chip set forms a constant....
This is an Automatic LCD Panel Backlight Control circuit. This is a simple low cost implementation of an LED controller. It can compensate for aging effects....
LM134 makes a good temperature sensor because it has a highly linear output characteristic. Because it is a current output device and is therefore not affected....
The heart of an average reading, rms calibrated AC voltmeter is shown in figure below. It`s a rectifier and averaging filter. We can remove the averaging function and provide a precision full-wave rectifier by deleting C2 and provide an absolute value....
DC drive for a Universal motor is shown in figure below. In order to supply DC current to the motor, a diode bridge has been added around the motor. The motor....
This is a Sine Wave Oscillator circuit. This circuit as known as amplitude-stabilized sine-wave oscillator. It can gives high purity sine-wave output down to....
Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the....
We can use ISL97676 as a LED driver that drives 6 channels of LED current for TFT-Display. The ISL97676 is used to drive 6 channels of LED to support 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias supply on the....
This is a Low-dropout (LDO) Regulator circuit, constructed by using only a single PNP transistor. This circuit is directly related to load current. At very low....
Basically, this circuit is a radio frequency (RF) oscillator that operates around 100 MHz. The audio which is picked up and amplified by the electret....
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to....
The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V....
This is Single Cell LED Flashlight circuit. This circuit uses white LED that has best power-efficiency combination at about 20mA and requires abut 3.3V. Each....
Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of ....
We can use the circuit below to maintain the level of water in the header tank within prescribed limits. A 3HP submersible bore pump which has a high starting....
All types of transistors including Darlington and power will be tested in this project. Connect the 9v battery around the other way at points A and B to test....
Using circuit below, we can animate the bike turning signal using LED. The bike turning signal will blink from the right side (D1) to the left side (D5) in a....
The output of this circuit is push-pull and consumes less than 3mA (with no signal) but drives the earpiece to a very loud level when audio is detected....
This is aquiz bell/alarm circuit. This circuit indicate fastest finger first . This circuit has one bulb for Quiz master and one for each contestant. The bulb will illuminate when a button is pressed. the cathode of the 9v1 zener sees approx mid-rail....
This is a voltage multiplier circuit. First circuit is used to double the a square wave (any amplitude). However there is minus about 2v losses in base-emitter....
This is a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must....
This is flashing LED circuit emulate the turning of incandescent lamp. The characteristic of incandescent lamp is that they can`t abruptly change the....
The circuit below consists of two multivibrators. The first multivibrator provides the speed of the change from `hee` to `haw` and operates at a low frequency....
Dynamic microphone uses a moving coil around magnetic field to convert mechanical movement into electrical signal. The ordinary mini speaker is turned into a....
When the microphone detects a loud sound, this circuit will turn the LED on. The `charge-pump` section consists of the 100n, 10k, signal diode and uF....
The circuit below consists of two twin-T oscillators set to a point below oscillation. To set the circuit into oscillation, we can touch the Touch Pad. Here is the schematic diagram of the circuit: By touching the pads in different ways and a whole range....
Below is a Courtesy Light Extender for cars. When a door is closed in a car, it extends the ON time, so the passenger can see where he/she is sitting. Here is....
A 40 watt fluorescent (tube lamp, TL) or two 20-watt tubes in series will be driven by this circuit. The transformer is wound on a ferrite rod 10mm dia and 8cm....
A 40 watt fluorescent tube lamp or two 20-watt tubes in series will be driven by this circuit but this circuit will produce less brightness than usual, since....
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....
This is a temperature indication and control system using the AD596/AD597. In this system, AD596/AD597 is used as a closed-loop thermocouple signal conditioner....
This is a buffer circuit for TMP01 Temperature Sensor. The output of this sensor is a low impedance dc output voltage with a 5 mV/K temperature coefficient....
This is a TMP01 Temperature Sensor Transmitter circuit. This circuit is used in industrial environments to transmit the signal differentially on a wire pair....
This is a TMP01 Temperature-to-Frequency Converter circuit. Converting voltage to the frequency domain is another common method of transmitting analog....
The schematic diagram described here is a TMP01 Celsius Scale Temperature Sensor circuit. This circuit is used to convert the VPTAT output voltage that is....
This schematic diagram is about TMP01 Fahrenheit Scale Temperature Sensor circuit. This circuit is used to convert VPTAT into an output that can be read....
Schematic diagram below shows an ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that can be used to regulate an output with a load of more than 20 A. It can be done if he power components like MOSFETs, the bulk capacitors and the....
In personal electronics and computer audio system, the SSM2167 is a complete and flexible solution for conditioning microphone inputs. It is also very good for....
Flip-flop, as an astable multivibrator, can be used to generate timing signal in music: metronome. By adjusting transistor bias resistor using a 100k....
This schematic diagram shows a water level sensor/detector/monitor circuit. An alarm is also featured in this circuit. Any fluid with a resistance under 900K....
This schematic diagram below shows a 555 IC water level sensor/detector alarm circuit. This circuit is powered through the emitter current of the BC109C. 555 timer is used as astable oscillator in this circuit. When this circuit is under dry conditions the....
Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal....
The output of this circuit will be activated when a mix of two tone/frequency is detected on the input. The frequency f is determined by the values of R1 and....
This is infrared (IR) proximity detector circuit. A matched infrared emitter and detector pair is used in this circuit. The voltage controlled oscillator....
A schematic diagram of a micropower single-supply instrumentation amplifier circuit is shown below. This circuit only need 15µA of current and can give over....
Oscillator circuit is an electronic circuit that produce a periodic signal. The term quadrature refers to a fourth (1/4) phase shift of full wave cycle (1/4 of....
This is a schematic diagram of a micropower voltage-controlled oscillator circuit. This circuit can generate square and triangle wave outputs and only need....
Unique applications of 567 tone/frequency decoder IC? Here is one of them: pulse generator with 25% duty cycle (active factor). This signal generator produce....
Precision oscillator can be built using quartz crystal, but with proper component selection, you can also build one with RC (resistor and capacitor) circuit....
The ADM3251E is a transceiver which has a high speed, 2.5 kV fully isolated, single channel RS-232/V.28. This device is operates from a single 5 V power supply....
AD8221 is an excellent candidate for bridge measurement because it has low offset and high CMRR over frequency. The bridge can be directly connected to the....
While traveling, charging of the mobile phone, cellphone battery is a big problem as power supply source is not generally accessible. Battery will go flat....
In conventional white LED design, the Max1916 low-dropout bias supply for white LEDs is a high performance alternative to the simple ballast resistors. A....
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically....
A very long time constant is provided by R1 and C1. C1 discharges and the near zero voltage at its positive lead is applied to the high impedance inputs of the....
This is Fluid/Liquid/Water Level Control circuit using LM830. The LM830 can be used to detect absence and presence of aqueous fluids. This application uses two....
This is a one transistor pump circuit. This is a very simple circuit and very helpful, you can use it as a building block for designing more complex electronic....
This is Hot Water Level Indicator circuit. This circuit can be used to monitor level of hot water in a tank. This circuit is simple and inexpensive. this....
Kids like the police or fire-brigade cars siren sound. This circuit can generate dual tone like Police or Fire-brigade cars siren sound. This circuit usually....
This is a TV Remote Control Jammer circuit. Remote control use modulated light to combat eer infrared nvironment/background infrared noise. Your room heater,....
This water level sensor (detector) circuit uses a standard NAND logic gate to produce oscillation and to detect the water level. Oscillation is included inside....
Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator....
Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many....
Every electronic device that boost electrical signal can be called an amplifier. The various amplifier types only differ in some specific features such as:....
Usually, LED is powered by DC supply, but this circuit can make the LED can be powered by AC supply. This circuit can be used as power indicator for Water pump....
Current mode amplifier has the benefit of higher frequency operation, and LM359 comes as operational amplifier with this type op amplifier. Current mode....
Analog meter normally doesn`t have high impedance since they don`t have buffer circuit inside. With active buffering, the input impedance of this circuit....
Photo-diode can be used for high speed digital transmission, but you have to provide high speed signal conditioner for that purpose. The amplifier circuit....
Voltage-to-frequency converter (VFC) circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function. This circuit....
This view is not far from wrong because the operation of FM detectors is widely regarded as mysterious. The ratio detector to find out how it works, without....
This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible....