This circuit is from a 1966 publication. The frequency depends on the capacitors and on R1 which can have values between 47k and 2.2 M typically. The supply voltage can be between 200 and 300 V.
This configuration, which appears on other circuits on this site, was found in a European...
This circuit can supply currents up to 1 A from alternating input voltages. The circuit uses...
This very simple circuit was found in a 1977 documentation. The L1 coil has 3 turns of AWG wire 22 to...