We found this circuit in a 1968 Electronics World. The potentiometer should be set to trigger the SCR when the battery is fully charged.
This is an RF amplification step for small signals using the common base configuration. The...
With this circuit, an external circuit can be controlled by turning it on or off and reversing it (if...
The figure shows how to use the LM3914 bargraph with expanded scale. The circuit has two...