Universal Battery Charger for Charging up to 18V Cell

Universal Battery Charger for Charging up to 18V Cell
This universal battery charger has regulated output voltage which can be adjusted as you need. Also, this circuit has an adjustable constant-current charging circuit.  So, the circuit will be compatible and easy to use with the most NiCad batteries.  It capable to charge a single cell or a number of series-connected cells up to a maximum of 18V. A series connection of power transistors T1 and T2 to manage the battery charger's output voltage and charge-current rate. An LM317

Charger for All Battery Types

Charger for All Battery Types
Note that the stability is observed when the load current and will change slightly of the supply voltage. Likewise, the fact is usually overlooked, but if you want a perfect stability - stabilize the power supply. Calculation of the current is very simple - the current in amperes is equal to 1.2 divided by the resistance R1 in Ohms. To display the current used transistor (germanium necessarily because of the low voltage opening) that allows you to visually observe