resistor color Table

Beginners Guide to Resistor Colour Codes

This table will help you with managing resistor color code so that you don't burn up your circuit due to a wrong resistor. Right below this image is a little tutorial to...

3W Audio Amplifier Using TDA7056

Audio amplifier circuits commonly use single-chip audio ICs like LM384 and LM386. These circuits look very easy to assemble but require additional components like resistors, capacitors and sometime inductors. Here we...

IOT Cameras That Can Chat

Nowadays, everyone's main concern is the safety of pets and kids when we are not around them. This concern keeps us constantly worried when we travel for holidays, go to work...
digital thermometer

Digital Thermometer

This digital thermometer can measure temperatures up to 150C with an accuracy of +_1C. The temperature is read on a 1V full scale-deflection (FSD) moving-coil voltmeter or digital voltmeter. Operational amplifier IC...

Water Overflow Alarm

This water overflow alarm is built around two BC547 transistors and two 555 timer ICs

RF Signal Detector

This simple RF signal detector circuit can be used to trace the presence of RF signals and electromagnetic noise in your residential area, office or shop. It can be a useful...
Circuit of the stress meter

Stress Meter | Circuit Diagram With Full Explanation

This stress monitor lets you assess your emotional pain. If the stress is very high, it gives visual indication through a light-emitting diode (LED) display along with a warning beep. The gadget is small enough to be worn around the wrist.
RTL-Software Defined Radio and Android setup

Software-Defined Radio with Android Smartphones

Software-defined radio (SDR) is one of the most important wireless communication technologies. It is a unique type of radio system that can tune to any frequency band. The SDR platform is...
alcohol level tester circuit

Alcohol Level Tester

A lot of accidents happen every day due to drunk driving. This is a very useful circuit for testing whether a driver is drunk or not. The circuit is easy to...
Street Light Controller

Street Light Controller

Two of the problems commonly associated with street lights are false triggering due to slight variation in the intensity of ambient light and no control over switching action. Here is a simple switching circuit for street lights that overcomes these problem

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