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.

High Current Regulator (CB10982E)
This circuit was obtained in a 1978 English magazine. This adjustable stabilized power source...
Windscreen Wiper Timer (CB4957E)
This circuit was found in old documentation, but as it uses the 555 it can still be easily...
Self timer (CB21579E)
This timer with field effect transistors was obtained from Fairchild documentation. The times...