Tuesday, December 7, 2021

Solidstate Switch For DC-Operated Gadgets

This solid state DC switch can be assembled using just three transistors and some passive components. It can be used to switch on one gadget while switching off the second gadget...

SOLID STATE AUTO POWER-OFF ON MAINS FAILURE

A good number of circuits which turn off the power to the load on mains failure have already appeared in EFY. This circuit is different because it consumes no power when...

SMPS Spark Suppressor

This circuit protects the power plug of a switched-mode power supply (SMPS) against sparks that may damage its contact terminals. It normally happens when the device (laptop charger, mobile charger, etc)...

Solidstate Remote Control Switch

Here is a solidstate remote control switch which uses readily available electronic components. The control circuit comprises the transmitter and receiver sections. The range of the transmitter is around seven metres. The transmitter...

Cordless Multi-Door Alarm

Thwart the attempt of burglary by detecting intrusion with this alarm circuit. Each door is protected by a separate circuit built around an independent 555 timer IC in conjunction with reed...

Mains Manager

Very often we forget to switch off the peripherals like monitor, scanner, and printer while switching off our PC. The problem is that there are separate power switches to turn the...

Cyclic Temperature Heating & Cooling Control System

This project proposes a Peltier element based cyclic thermoelectric heating and cooling system with precise temperature control by using PID controller with microcontroller. In this project I have used Peltier Thermoelectric...
 
 
 

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