TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

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...