How to make an Arduino Battery Charger v2

So we are back with an update to the NiMh battery charger. In this iteration, we are able to charge a single NiMh AA battery(more batteries would only require a different battery holder) in constant current mode. Charging is stopped when when the INA219 current sensor module detects a drop in the current (negative delta V).

Once We have this running reliably, the next step is to take what we learned here and apply it to a LiPo battery.

All of my sketches are available here:

Links to all of the modules used here:
INA219 Current Sensor:

Yeeco DC-DC Buck Converter :

.96 OLED Display:×64-Display-Arduino/dp/B00O2KDQBE/ref=sr_1_1?ie=UTF8&qid=1487781554&sr=8-1&keywords=96+oled+display

Please watch: “Diodes: The basic building block of all digital circuits”



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