Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern equivalent components. The SCR and the diodes must be according to the load current.
Factor Q measures the selectivirty of a resonant circuit and also receivers. This circuits cen...
This circuit was suggested by Popular Electronics from the 90s. The circuit is quite simple using...
Found in a 1969 neon lamp publication, this circuit provides two voltages under very-low currents....