Automatic shut-off circuit
This alarm circuit is very simple, if triggered once, will keep on sounding until either the battery is drained off … Read more
Digital Circuits
Audio metronome circuit with led indicator
The metronome circuit of circuit below produces audible ticks from 40 ticks per minute to 400 ticks per minute by … Read more
1 MHz Crystal Oscillator based CMOS 4011
Many electronic circuits requiring precision control of time use crystal oscillators. A simple crystal oscillator using only one NAND gate … Read more
Simple Pulse Generator Circuit
The output waveform of oscillator circuits shown in picture circuit below is square wave because capacitor C charges and discharges … Read more
Astabil Multivibrator circuit using CMOS
The astable multivibrator shown in above picture operates in a manner very similar to a free-running multivibrator using two cross-coupled … Read more
Digital logic touch switch circuit
Many circuits for TAPs (Touch Activated Pro-gramme switches) have previously been pub-lished. However, all of these required the use of … Read more
Digital Volume Control Circuit
Many of today’s hi-fi amplifiers feature a “clicking” digital volume control circuit, but this is only rarely a real stepped … Read more
Digital Audio Selector Switch Circuit
Digital audio selector switch circuit: Switching audio signals digitally could be done with the aid of CMOS analogue switches or … Read more