This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
The astable circuit in the figure makes it possible to obtain flashes at the frequency of 1 Hz of a...
This circuit of an Electronics Hobbyists Handbook uses a different configuration for a triac. The...
The circuit shown is from a 1993 documentation. It uses two FETs in an oscillating configuration that...