4$ LIPO checker (1-4S)
thingiverse
$4 LIPO checker quickly checks all the cell voltages. This supports 1-4S LIPOs, Li-ion or similar batteries with a cell voltage of 2.5V to 30V. You will need four voltage displays and one balance wire. The links for these are: - Four x Voltage Displays - One x Balance Wire Wiring the display is as follows: Balance Wire 1 (ground) goes to the first voltage display's ground. Balance Wire 2 goes to the first voltage display's plus, then to the second voltage display's ground. Balance Wire 3 goes to the second voltage display's plus, then to the third voltage display's ground. Balance Wire 4 goes to the third voltage display's plus, then to the fourth voltage display's ground. Balance Wire 5 goes to the fourth voltage display's plus. Make sure to use heat shrink to isolate your solderings. After soldering and testing that everything works, adjust the screws behind each voltage display until they show the correct cell voltage.
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