Has anyone got or done any battery charging circuit for 4.5V battery with LED indication?
I have one transmitter with me and I have attached few Lithium-Ion batteries totalling upto 4.5V. I also have few smps (mobile chargers) power supplies capable of 5V - 500mA. I was thinking of putting a circuit which can glow an LED when batteries are charging and switch the LED off when they are fully charged.
I don't want to involve PIC in the middle so any circuit without it would be nice.
Any help is appreciated. Thanks