Found in American documentation from the 1980s, this circuit uses common components. The operating frequency range depends on the plug-in coils.
Found in a 1960s RCA manual, this circuit uses components from the era. For the indicated circuit R1 is...
This circuit is from a 1990 publication but can still be assembled today with some component...
This circuit aims to use the output of a microcontroller with low current to drive a load of a...