4-scale millivoltmeter (CB7389E)

Found in Radio Electronics from the 90's, this circuit can be implemented with other operational amplifiers. The power supply is symmetrical.

| Clique na imagem para ampliar |

Transducer amplifier (CB9064E)
This circuit applies to other operational ones, other than the one indicated. The formulas next to the...
Regulated AC DC Converter (CB465)
This circuit can source 3 to 12 V with currents up to 500 mA depending only on the transformer....
Motor reversal (CB22082E)
This relay circuit is intended for reversing small DC motors. The circuit is from an old...