Digital Fuel Gauge (CB26173E)

This two-digit circuit was found in the 1999 Radio Experimenter Handbook. It uses the CA3161 and CA3162 A/D converter pair common at the time.

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Pulse Width Multiplier (CB6349E)
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
Flasher with Transistors (CB5210E)
We found this circuit in an American 1980s documentation. The transistors can be equivalent as BC548...
Single Phase AC Motor Driver (CB7151E)
This circuit was found in Sprague Electric documentation from the 90s. The circuit uses a...