This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps. The diodes can be general purpose or even 1N4002. The transformer is 6.3 V with 100 mA or more current.
This circuit is from an American transistor book from the 60's. The transistor is germanium of the...
This blocking oscillator configuration was found in a 1964 American book. The circuit can be...
November 2016 - Torex's new XCL219 and 220 DC-DC converters are available from Mouser Electronics...