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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Sound Effects Center (CB16405E)
This project was found in a documentation from 1980. It is a central of sound effects, a simple...
15 W amplifier – first stage (CB20580E)
This amplifier for public address was found in English documentation from 1967. The transistors are from...
Headphone Amplifier with the 741 (CB10248E)
This circuit was found in an English magazine from 1978, but it is still current, just change the...