This is simple but low cost universal battery Charger for NiCD - NiMH batteries. This circuit is Ideal for car use. It has ability to transform a mains adapter in to a charger . This one can be used to charge cellular phone, toys, portables, video batteries, MP3 players, ... and has selectable charge current. An LED is located in circuit to indicate charging. Can be built on a general purpose PCB or a veroboard. I hope you really like it. Low Cost Universal Charger Circuit Diagram: Parts: R1 = 120R-0...5W R2 = See Diagram C1 = 220uF-35V D1 = 1N4007 D2 = 3mm. LED Q1 = BD135 J1 = DC Input Socket Specifications: Ideal for in car use. LED charge indication. Selectable charge current. Charges Ni Cd or NiMH batteries. Transforms a mains adapter into a charger. Charge cellular phone, toys, portables, video batteries … Features: LED function indication. ...