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 →
1001 Electronic Project Circuits
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 →
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 →
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 →
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 →
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 →