Lead Acid Battery Charger (CB26301E)

This power charger was found in a 1990s issue of Popular Electronics. Integrated circuits must be equipped with a heat sink.

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Voltage Controlled Amplifier (CB25145E)
This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and...
Astable NAND CMOS II (CB19539E)
This configurable CMOS configuration for frequencies up to a few megahertz was obtained in an...
Didactic Adder (CB18063E)
The purpose of this 2005 circuit is to demonstrate in a very simple way the principle of operation of a...