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29 Oct 2010
Here is a lead acid battery charger circuit using IC LM317. The IC here provides the correct charging voltage for the battery. A battery must be charged with 1/10 its Ah value. This charging circuit is designed based on this fact. The charging current for the battery is controlled by Q1,R1,R4 and R5. Potentiometer R5 can be used to set the charging current. As the battery gets charged the the current through R1 increases.
Lead Acid Battery Charger Circuit – [Link]
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