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.

200mW Amplifier (CB23554E)
This small auxiliary amplifier was found in a Radio Electronics from May 1958. Power is supplied with...
Steady Hand (CB22083E)
This steady hand or nerve-rest or steady hand as called in the original English publication uses a...
400 mA Buck Regulator CIR16840S CB12942E (CB12942E)
The circuit shown in the figure consists of a fixed buck regulator using the MIC23021 integrated circuit...