This simple charger was found in a 1980s documentation. The transistor may be the TIP42 with a heat sink. R1 adjusts the load current. The transformer has 1 A of secondary current.
Found in Intersil documentation from the 90s, this thermometer uses an analog indicator. The...
The integrated circuit used in this charger is not very common today. The circuit is from...
The purpose of this circuit is to determine from the position of the float which of the pumps...