This circuit is better than the previous one in that the control is isolated by a transformer. The transformer has 110 or 220 V primary and 6.3 to 12 V secondary with 200 to 500 mA current.
This circuit was obtained in a 1964 magazine, but it can be easily assembled today, as the...
This circuit was published in the Ideas section of Radio Electronics magazine in August 1983. The...
The MOS field effect transistors of this circuit are not very common, as it is a project from the...