ANTI-COLLISION REAR LIGHT
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 During Telephonic Conversation
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...
PARROT-SOUNDING AC DOOR BELL
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...
LED Illumination for Refrigerators
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,...
Electronic Reminder
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....
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
AUTOMATIC EMERGENCY LIGHT
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...
