Q2 is the main switching MOSFET for the buck converter and Q3 is the synchronous switching MOSFET.
This device proved to be unreliable for the application and is recommended to be replaced with an ACS712 breakout board.ĭescription of circuit operation (refer to Charger circuit V1.pdf) This button was very useful during initial testing.Īlso in this build for the current measurement an AD8212 current sensing OP-AMP is used. Also there is a reset button pulled onto the front board for easy access, if the code gets stuck. The indication is done by 4 LEDs as visible on the circuit schematics.
