This circuit was found in the July 1969 Radio Electronics magazine. The circuit controls resistive loads and universal motors with power according to the SCR used.
This circuit makes use of a specific 80's component and was found in an American manual of the...
The circuit shown in the figure, generates a positive pulse whose duration depends on C1, from the...
We found this circuit on the internet. The components are current, and the time depends on C1...