Found in a 1990s Motorola documentation, this high voltage circuit uses a PUT that is not a common component today. The maximum power is 50 W.
This circuit alternates the activation of two pumps depending on the position of the float. The...
We found this configuration in an early 1977 publication. The PNP transistor may be the BC558 and...
This circuit is better than the previous one in that the control is isolated by a transformer. The...