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 is from a Radio Electronics magazine from August 1990. The circuit uses components from the...
The circuit we show is part of an article that taught its complete assembly. The article is from...
This ultra-simple polarity indicator uses common green and red LEDs and can work with 3 to 9 V...