Blown Fuse Alarm (CB6109E)

We found this circuit in a 1967 Electronic design. However, it can be easily implemented even today as it uses only common diodes.

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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...