This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...
This circuito from the 1977 GE Semiconductor Manual circuit provides timings from 0 to 90 seconds...
We found this circuit in an American publication from the 1990s. The triac must be equipped with a heat...