led driver circuit

I have a basic multi meter, bread board, soldering iron and perf board.

I have a led work lamp which has a broken case like this, https://www.torchstar.biz/detail.php?id=820 it has a battery cut off and charge circuit built on to the control board could this be used??

and i was hoping to replace the led bar with individual leds

i was going to build a car shaped night light out of an old rc car

Hi Dave - I do not have enough information to tell you. The LiPo battery that you mentioned, does it come from the work lamp so that it is matched to the charge circuit? You will have to perform the experiments on the individual LEDs or go with the single brighter LED as outlined by Peter. Are you replacing the work lamp LED strip as it is too bright and concentrated to make a good night light? I hope you can make this work as it seems like a project your son will really like.

John

Hi John, yes the Lipo came from the work lamp i fingered it would be better to use the circuit and battery together than use the battery on it own and charge it separately.

your right about the Led bar when it tested it, it practically lit up the entire bedroom

so i decided to go with the 5mm white leds, just so they will fit in to the car

thanks

Dave

That sounds good Dave. The battery and charging question is resolved. Let me know how your testing of the 5mm LEDs go on the 3.7Volt source.  Since you are going to be dealing with relatively low mA I do not think there will be any problems with heat or a large impact from using resistors to limit the current as opposed to using the current generator circuit that Peter mentioned. It just depends how fancy you want to get.

John

That sounds good Dave. The battery and charging question is resolved. Let me know how your testing of the 5mm LEDs go on the 3.7Volt source.  Since you are going to be dealing with relatively low mA I do not think there will be any problems with heat or a large impact from using resistors to limit the current as opposed to using the current generator circuit that Peter mentioned. It just depends how fancy you want to get.

John