AD to PC Converter (CB7455E)

Found in a Popular Electronics from the 90's, this circuit makes use of an integrated from the uncommon era today. The circuit serves as a reference.

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HT2030 Ornamental LEDs (CB26036E)
This circuit with two HT2030s powers 6 LEDs in a decorative flashing system. The circuit is from...
5 V x 1.5 A Regulator LM117 (CB15177E)
The regulator for TTL source is from the SGS linear integrated circuits manual. The integrated circuit...
Whois the fast For 3 Competitors (CB3860E)
The SCR sector of this circuit can be powered by high voltage AC and instead of the LEDs we can...