This circuit was found in a Philips documentation from 19678. The transistors are from the period with emphasis on the married pair. Modern equivalents can be used.
This setting appears elsewhere in this section. This was obtained from an American 1980s...
This speed control for small DC motors can operate from 6 to 12 V sources. The motors can drain...
We found this circuit in a 1964 Electronic Design. Transistors can be modern general-purpose...