We found this circuit in the March 1999 issue of Electronics Now magazine. The indicator used is an analog type. The values indicated depend on the calibration.
This simple charger was found in a 1980s documentation. The transistor may be the TIP42 with a...
We found this circuit in a French technical documentation from 1982. The circuit can be...
T This circuit activates a relay at the end of the time delay. The indicated relay is of the low...