This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
Using the well-known SAA1027, this circuit serves as interface for PC. No English documentation was found...
This speed control for small DC motors can operate from 6 to 12 V sources. The motors can drain...
We found this transformer-isolated control circuit in a June 1995 Electronics Now. The triac must...