Smart Switch
To switch on the mains voltage, either a mechanical switch or a relay offers a simple solution. However, the relay and its associated components...
Transistor Tester
With this transistor tester, you can test both npn and pnp transistors using this circuit. The circuit indicates whether the transistor is good, open...
Portable Lamp Flasher
Here is a high power incandescent electric portable lamp flasher. It is basically a dual flasher (alternating blinker) that can handle two separate 230V...
Overspeed Indicator
This speed indicator circuit is designed for indicating over-speed and direction of rotation of the motor used in mini hand tools, water pump motors,...
220V Live Wire Scanner
Presented here is a 220V live wire scanner. The clock input of the IC is connected to a wire, which acts as the sensor....
Telephone Conversation Recorder
This is a circuit for a telephone conversation recorder that can record conversations over the telephone in a tape recorder...
Light Dimmer that Doubles as Voltmeter
Measure AC mains voltage without using a multimeter. All you need to do is to slightly modify the light dimmer fitted at the base...
Automatic Dual Output Display
This circuit lights up ten bulbs sequentially, first in a direction from first bulb to last bulb and then in a reverse direction.
Reaction Time Game
This reaction time game tests the time taken by two players to react, and declare the fastest one as a winner. To do this...
50 Ideas to Get Funded on Idea Day Event in December
Thiruvananthapuram, Nov. 29: Kerala Startup Mission (KSUM) will select 50 innovative, socially-relevant and scalable ideas from different sectors for funding next month as part...