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.

| Clique na imagem para ampliar |

Preamplifier with the BC549 (CB15720E)
The circuit shown in the figure serves as a pre-amplifier with a voltage gain of around 12 times,...
Amplifier TBA820 (CB18082E)
The amplifier shown can either excite a speaker in this low power version, or its input step can...
LED VU (CB22157E)
This circuit was found in a 1989 publication. The operational amplifier supports equivalents. The...