The circuit is from the Linear applications Handbook of the National Semiconductor of 1994. The components used are not common today.
I got this circuit from an English magazine from 1977. It can still be easily assembled, as the...
In the figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...
We found this circuit in a 1980 publication. It can be applied to Triacs of the TIC series and the...