Category: 555 circuits

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Police flashing strobe light circuit using 555

Strobe lights are commonly used as emergency vehicle lights for visual warnings. Their light effects are similar to the flashing light in police vehicles, ambulance, beacon light bars, etc. The given police light circuit...

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Brake light flasher circuit

Simple flashing brake light The circuit can use to make a simple pulsating stop brake light which continuously flashes as long as the brake is applied. Here we are using a 555 astable multivibrator...

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Infrared burglar alarm using IC 555 circuit diagram

This infrared burglar alarm can use at doors, entries, etc. To alerts us, when somebody crosses through the IR beam. As the IR beams are invisible to human eyes, the circuit can work as a hidden security device. To...

LED flasher circuit diagram using 555 timer ic 0

LED flasher circuit diagram using 555 timer ic

An LED flasher circuit can be used as an LED blinker, vehicle indicator light, signal flashlight, etc. A simple blinking circuit is basically a circuit to continuously ON and OFF the light supply on...

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Beeper circuit using 555 timer IC

Here the circuit for a simple Beeper alarm using 555 IC, which generates a Beep-Beep tone. This tone generator circuit is suitable for indicators, emergency alarms, etc. The circuit consists of two astable multivibrator...

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Voltage controlled oscillator circuit – VCO using 555

A Voltage controlled oscillator (VCO) circuit varies its frequency of the oscillation with respect to the externally applied voltage. The VCO circuit can obtain a linear variation of oscillation in relation to the input voltage. The...

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Auto power cut off timer circuit

An automatic timer switch turns OFF a load itself after a fixed period of time. The circuit will be useful for various devices which we forget to turn OFF such as light, alarm, indicator circuits,...

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Police siren circuit using NE555 timer

The wailing siren can be used as a tone generator, indicators, alarm, etc. The circuit consists of two astable multivibrator circuits using 555IC, one with (IC 1) low frequency and other with (IC2) high...

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Vibration sensor alarm circuit diagram

The circuit can be used as an intrusion detector alarm which can be simply placed on doors, floors or any surface where any vibration or pressure is generated during any intrusive actions. This burglar alarm...