Automatic shut-off circuit
This alarm circuit is very simple, if triggered once, will keep on sounding until either the battery is drained off or the power is cut-off. Pictures circuit below shown an … 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 variation of one potentiometer. Gates one and two form a … 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 based CMOS 4011 shown in picture below. Resistor R1 biases … 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 through the same resistor R. In circuit below, the charge … 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 NPN transistors. Two NAND gates are used as linear amplifiers … Read more →
