DIY Flashing Safety Light Circuit Using LEDs for Vehicles
During poor visibility, i.e., when there is fog, or at dawn or dusk, or when your vehicle gets stalled on a lonely stretch of...
Automatic Wash Basin Mirror Lamp Controller
In restaurants, auditoria and even homes, many a times we forget to switch off the wash basin mirror lamp after use. The circuit given...
Auto Muting Circuit During Phone Calls
Telephone conversation can be made disturbance-free using this simple circuit. As soon as you lift the telephone handset to converse, the TV, music system...
DIY Doorbell That Sounds Like a Parrot—No IC Required!
Here is a mains-operated door-bell that produces parrot-like sweet voice without requiring any musical IC. The circuit is cheap and easy to construct. The...
Circuit for UPS to Hybernate PC
Most of the low-power UPS systems available in the market do not have the facility to shut down the PC before they turn off...
DIY: Replace Fridge Bulb with Energy-Efficient LED Lighting
The incandescent lamp provided inside the refrigerators glows whenever we open the door. It suffers from several disadvantages like:
1. Being a single light source,...
DIY Reminder Circuit with Buzzer and LED
This easy-to-build electronic alarm will remind you of an impotant task after a preset time. It is particularly useful for housewives and busy professionals....
DIY Automatic Emergency Light Circuit with Auto Charging Feature
This emergency light has the following two advantages:
1. It turns on automatically when the mains power fails, so you need not search it in...
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...
DIY LED Chaser Circuit with Tune Generator Using NE555
IC1 (NE555) is used here as a clock generator. It is configured as an astable multivibrator whose frequency can be adjusted with the help...