SparkFun Forums 

Where electronics enthusiasts find answers.

General project discussion / help
Did you make a robotic coffee pot which implements HTCPCP and decafs unauthorized users? Show it off here!
By Traxxtar
#180459
I'm having a hard time finding a solution for the following:

Need 12v 7Ah rechargeable to fit inside a large enclosure. I'd like the user to just plug a cable into a 110v wall receptacle to recharge the battery when it runs down.

I've been unable to find a ready made recharging circuit that I can install inside the enclosure. Does such a thing exist? I've seen lots of the tiny LiPo recharging circuits, but not one I can tie directly to 110v.

thanks!
By waltr
#180493
Wall Wart to convert the AC mains to a low Voltage DC that then plugs into your enclosure to power the battery change circuit.

This is a safe method so you or a user does not come into contact with AC mains Voltage.
#181415
You could get a KeyLine charger, cut off all but 2 inches of the 110v electrical cord, and solder it onto a generic computer power socket. Mount the socket through your enclosure. Then you can use any PC power cord. These chargers work well on sealed batteries, I use one on a robot project.