Auto-Cut 12v Lead Acid battery charger
this is a auto-cut charger for a Lead acid battery using relay and a 12-0-12 transformer
Created by
Anshuman Tripathy
Tier 5
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Anshuman Tripathy
submitted Auto-Cut 12v Lead Acid battery charger for review ago
Anshuman Tripathy
added to the journal ago
modified a few things
modified the pcb a bit just changed the placement of a of a few parts and researched the parts that i need for the board. the 2 trimpot need will used to set the cutoff and on voltage for the board
Anshuman Tripathy
added to the journal ago
Completed the PCB
Completed routing the PCB and finding the components required most of it were that i alr have with me just needed to add a few more things.
also learned to use the easy eda to kicad tool its amazing so useful for ppl who source there parts from lcsc very handy
Anshuman Tripathy
added to the journal ago
Completed Schematic
So i looked at a few circuits online and designed a circuit referencing them and added some parts which i already had with me and made the schematic.
the basic working principle is that the circuit will be powered using a 15-0-15 transformer and will have a LM317T regulator ic to adjust the cutoff voltage. and when the cutoff voltage will be reached the circuit will turn off automatically via a relay.
Anshuman Tripathy
started Auto-Cut 12v Lead Acid battery charger ago
1/24/2026 7 PM - Completed Schematic
So i looked at a few circuits online and designed a circuit referencing them and added some parts which i already had with me and made the schematic.
the basic working principle is that the circuit will be powered using a 15-0-15 transformer and will have a LM317T regulator ic to adjust the cutoff voltage. and when the cutoff voltage will be reached the circuit will turn off automatically via a relay.
1/24/2026 9 PM - Completed the PCB
Completed routing the PCB and finding the components required most of it were that i alr have with me just needed to add a few more things.
also learned to use the easy eda to kicad tool its amazing so useful for ppl who source there parts from lcsc very handy
1/25/2026 - modified a few things
modified the pcb a bit just changed the placement of a of a few parts and researched the parts that i need for the board. the 2 trimpot need will used to set the cutoff and on voltage for the board