Found in a 1965 Electronic Design, this circuit generates adjustable pulses between 200 uA and 10 mA. The components admit equivalents. Pulse duration is 1 us.
This stable with the waveforms oscillates at 1006 Hz. We found it in a Ferranti manual from 1964....
We found this circuit in an Argentine documentation from 1973. The transistor admits a more modern...
This circuit was found in a 1980 documentation. The triac used is of the TIC226D type which in the...