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
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...
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.
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
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
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
