Electronic Circuit Prototyping More Than Just An Artefact
Prototypes are not just a vital element of the electronics design but a powerful tool for public communication and exhibition too. Creating a physical mock-up of an object makes it possible...
Automatic Room Power Controller
An ordinary automatic room power control circuit has only one light sensor. So when a person enters,the room it gets one pulse and the lights come ‘on.’ When the person goes...
Microcontroller Based Solar Charger
As the sources of conventional energy deplete day by day, resorting to alternative sources of energy like solar and wind energy has become need of the hour. Solar-powered lighting systems are...
Simple Automatic Water-Level Controller
Water level controllers are common nowadays. The automatic water level controller described here is built around a timer NE555 and inverter buffer CMOS IC CD4049. It uses readily-available, low-cost components, and...
Multi-utility flashlight
This multi-utility flashlight consists of three sections: a flasher, a sound-to-light display and a white LED-based flashlight.
Multi-utility flashlight circuit
The flasher circuit is built around an NE555 timer IC that is wired...
Night Alert System
Idea of this night alert system came to me one midnight when my pet dog started barking continuously on sensing a moving shadow, perhaps that of an intruder. Dogs have a...
AC Switch Control With Opto-Triac
AC switches are silicon devices that control AC loads directly connected to the AC mains. This means that the driving reference terminal of the AC switch can be connected to the...
Time For a Break
This is a computer based Break Timer program to remind you to take regular breaks while working on your desk for good health. Some of us spend at least sixty per...
Automatic Fan Controller For An Active Heatsink
This Automatic Fan Controller circuit is based on a thermistor and an operational amplifier (op-amp) that drives a MOSFET to switch a cooling fan on and off in an active heatsink...
Dummy Load for Amplifier Testing
If you want to test an audio amplifier,here is a compact fan-cooled dummy load that can be used to provide any of the three commonly needed load impedances (4 Ω, 6...
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