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It is very interesting and convenient to be able to control everything while sitting at your PC terminal. Here......
This jam circuit can be used in quiz contests wherein any par- ticipant who presses his button (switch) before......
This simple and inexpensive circuit built around a popular CMOS hex inverter IC CD4069UB offers four sequentia......
It is well know that pests like rats, mice etc are repelled by ultrasonic frequency in the range of 30 kHz to ......
escribed here is a very inexpensive solution to many phono-controlled applications like remote switching on, f......
Normally analogue-to-digital con-verter (ADC) needs interfacing through a microprocessor to convert analogue d......
ircuit of a new type of remote control switch is described here. This circuit functions with inaudible (ultra......
Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect it to an amp......
Many a times one needs an extra telephone ringer in an ad joining room to know if there is an incoming call. F......
Using this low-cost project one can reproduce audio from TV without disturbing others. It does not use any wir......