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Digital Circuits

Automatic shut-off circuit

October 30, 2020August 2, 2020 by Angga Daren

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 →

Categories Digital Circuits Tags cmos, control

Audio metronome circuit with led indicator

June 26, 2020 by Angga Daren

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 →

Categories Digital Circuits Tags audio, metronome, pulse

1 MHz Crystal Oscillator based CMOS 4011

October 29, 2020June 25, 2020 by Angga Daren

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 →

Categories Digital Circuits Tags 4011, oscillator, xtal

Simple Pulse Generator Circuit

June 20, 2020 by Angga Daren

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 →

Categories Digital Circuits Tags cmos, generator, pulse

Astabil Multivibrator circuit using CMOS

June 20, 2020June 20, 2020 by Angga Daren
astabil multivibrator

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 →

Categories Digital Circuits Tags astabil, cmos
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