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LM317 12V Lead-Acid Battery Charger With 3-Step Auto CC/CV and Trickle-Charge

For best charging of lead-acid batteries a 3-step technique is usually employed, consisting of:
  1. An initial constant-current (CC) mode for the majority of the charge
  2. A high, constant-voltage (CV) mode to top off the charge
  3. A...
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it's an excellent circuit. thanks for sharing. Can you include the step for initial setup as well ?
Nice idea

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