BATTERY TRICKLE CHARGER


Posted on Feb 5, 2014

The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is determined by the formula VOUT= l. 25 (1+R2/R1). I chose a 10-k © resistor for R1 and a 100-k © resistor for R2 to allow for a little wasted current flow (around 125 A). This will develop 13. 75 V between the output terminal and ground. R3 and a diode


BATTERY TRICKLE CHARGER
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prevent burnout if the terminals are shorted or reversed, and prevent battery discharge in the event that the regulator is disconnected from the main power supply. The capacitor is optional but will make life easier on the chip under an extreme charging cycle. With proper heat sinking, the IC is capable of carrying 1. 5 A to the battery. The circuit can be left hooked to the battery all of the time and will not overcharge it.




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