This is the Simple Current-Limited 6-V Charger Circuit Diagram. An LM317HV regulator is used as a current-limited charger. If current through R4 exceeds 0.6 A, Ql is biased on which pulls the ADJ terminal of the LM317 HV to ground and reduces the battery-charging current.
Simple Current-Limited 6-V Charger Circuit Diagram
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