I found a schematic on the LM317 datasheet (attatched). How does Rs limit current? I'd like to use this to charge my motorcycle batteries (7AH and 12AH), not at the same time. Will it work alright? It'd be powered by an 18v 680ma DC output walwart.
Right now I charge the battery with a 12v 100ma DC output walwart, it takes a few days but it does charge it. But I'd like a little voltage protection (the 100ma 12v is 15.51v with no load, so I'm sure eventually it could get the battery there), and also 100ma just takes forever to charge a battery. 680ma would get it charged in less than 24 hours.
Right now I charge the battery with a 12v 100ma DC output walwart, it takes a few days but it does charge it. But I'd like a little voltage protection (the 100ma 12v is 15.51v with no load, so I'm sure eventually it could get the battery there), and also 100ma just takes forever to charge a battery. 680ma would get it charged in less than 24 hours.
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