Category: 555 circuits

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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 Circuits Using 555 Timer IC 0

LED Flasher Circuits Using 555 Timer IC

IC 555 Simple LED Flasher 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...

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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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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...