Solid state relay (CB8518E)

This circuit was found in a 90s Popular Electronics. Both the coupler and the MOSFET can be of any type.

Sequential Flasher (CB25044E)
We found this circuit in the February 1987 issue of Radio Electronics magazine. It is based on an...
Fence Electrifier (CB12895E)
This circuit is from an Argentine publication from the 1970s but can still be assembled with...
Power stage for oscillators (CB22383E)
We found this circuit in a publication from the 90's. The circuit is used with sinusoidal...