Found in old documentation, this circuit makes use of amplifiers of the time, uncommon today. Next to the diagram, the formula for calculating the components.
Using neon lamps, this circuit from a 1969 publication provides 17 V of maximum voltage or else...
This circuit was published in a 1979 magazine, but it can still be easily assembled, as the...
The purpose of this circuit is to intermittently start an aquarium air compressor. The intervals...