Using an integrated circuit that was available at the time, this circuit produces animal sounds such as mooing, rooster crowing, etc. The circuit is from a March 1997 Electronics Now magazine.
The circuit presented is a 10 MHz oscillator with crystal, which already has several splitters for...
This circuit uses a sensitive vibrator that can be made with a reed-switch to activate a relay from...
The sensor of this circuit is an NTC with a resistance between 200 and 1000 ohms. The resistor R1 must...