The supply of this circuit can be done with voltages from 8 to 28 V and the maximum output current is 3 A. The gain is 36 dB. The speaker impedance is 4 ohms.
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...
Found on 90's Popular Electronics, this circuit triggers when the microphone picks up a sound. The...
This traditional metronome circuit is powered by voltages from 9 to 12 V and output drives a...