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Forum Index : Microcontroller and PC projects : Gel-Cell charger....
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9603 |
Hi folks. 
I want to incorporate a charging circuit in my latest PCB, so that it can have on-board battery charging and backup. The battery will most likely be a 12v Gel-Cell in either 1.2Ah or 7Ah size. I have been looking around the web, and there are heaps of circuits from plain nasty ones, to fully digital ones with displays etc. I am thinking that something along the lines of this circuit would be a good starting point - simple, and probably very effective. Does anyone else have any other ideas? I do NOT want fully-digital type circuits unless they are simple and cheap-ish to implement. I also like passive regulator type circuits for this kind of thing, as it needs to run 24/7, and taking any MCU out of the picture means the PSU cannot fail cos of some kind of power brown-out etc. However, open to all ideas and links or suggestions. EDIT: There is also this circuit by Colin Mitchell: 
I like this one too. I only need a slow(or trickle) charger - fast charging is NOT required, but some form of current-limited charger would be the way to do it, which is why I like these 317 setups, and 500mA or so would be be perfect. Has anyone here used the likes of the circuits above, to charge their own Gel-Cell batteries? Smoke makes things work. When the smoke gets out, it stops! |
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