Solid state relay (CB8518E)

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

Car Anti-Theft Alarm (CB18614E)
This circuit has several features, such as timing to activate and deactivate, in addition to a...
Monostable Using the 4528 (I) (CB132E)
The 4528 is a dual-retriggerable monostable that needs only the timing network formed by R and C...
Automotive Tachometer with the 555 IC (CB1419E )
This circuit from a 1978 American publication is used on vintage vehicles that still have contact...