When the 24 V battery voltage drops below 18 V, this circuit cuts off its discharge. The circuit is from 1968 documentation. It can be adapted to operate with other voltages.
The sensor for this light relay found in a 1967 Japanese magazine is a common photocell. The...
This circuit was found in an Electronics Now from the 80's. The circuit is designed for 3-digit...
We found this circuit in an old documentation. What it does is flash two LEDs when night falls or when...