This power supply protection circuit using a relay was found in a 1967 documentation. The components are from the time, but current equivalents can be used depending on the power source current.
In this circuit, from a documentation from the 70's, we have the way to control the active cycle of...
This triac phase control circuit uses an integrated circuit not very common today. We found this...
The components of this circuit are exchanged for modern equivalent such as 470 K for the pot and...