Found in 90s Popular Electronics, this circuit fires a load through a MOSFET from an audio signal applied to the input. Power supply is done according to the load.
This simple general-purpose transistor mixer was taken from an article in Electronics Now magazine in...
An oscillator that can be frequency controlled by a resistive sensor is shown in the figure. The...
Found in a 1967 RCA documentation, this circuit can be made with equivalent SCRs according to the...