Found in ancient American documentation this circuit uses semiconductors from the thyristor family such as SCRs, Triacs and unijunctions. The circuit can control loads up to 550 W with the indicated triacs.
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...
Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per...