Category: 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 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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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...

IR remote control circuit diagram 2

IR remote control circuit diagram

Here the circuit of a single channel Infrared remote controller, which can be used to control home appliances and devices. The IR remote controller consists of a receiver circuit similar to a toggle switch...

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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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LED chaser circuit using IC 4017 and 555

Here the circuit for a LED chaser or LED running light, which can be used as a decorative light, fancy light, chasing taillight for vehicles, etc. The circuit consists of a 555 timer with...

ON OFF Toggle switch circuit diagram using IC 4017 0

ON OFF Toggle switch circuit diagram using IC 4017

A toggle switch can use to ON and OFF the load alternatively with the incoming pulses. That is, to act as a push ON and push OFF switch. The circuit uses a decade counter IC...

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Non contact AC voltage detector circuit

A non-contact AC detector is an easy and safe AC live line tester. It can detect electricity in a conductor without any physical contact. The device can indicate as it reaches near to a...