Low battery indicator 555 (CB9551E)

This circuit can operate with different voltages, depending on the zener used. We found it in a 90s American documentation.

Pulse Generator 555 (CB18645E)
This is the conventional astable configuration of the 555 integrated circuit already explored in...
12 V regulator 741 (CB15060E)
The maximum current of this circuit can reach 500 mA with BD136 and 1 A with TIP32. The circuit...
Rectifier Diodes Tester (CB3802E)
This circuit was found in a 1980s technical documentation. It tests the inverse characteristics of a high...