| Li-Ion (18650) battery capacity meter | |
|---|---|
 | |
| Participants | |
| Skills | 1337 Skillz, Arduino, Coding, Hackery |
| Status | Planning |
| Niche | Hardware |
| Purpose | Infra |
| Tool | No |
| Location | |
| Cost | |
| Tool category | Electronics |
Li-Ion (18650) battery capacity meter
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As of many hackerspaces we rescue 18650 cells from old laptop batteries and other sources
We do have a charger but no good way of testing the capacity of each cell before it goes into the parts pile
Making a capacity tester would solve this. One could buy a chinese unit from fleabay but where is the fun in that? :)
partlist:
- Arduino pro mini - Display - Button - TP4056 module - 18650 battery holder - 5v relay - DC current load \ - Logic level N chan mosfet - lm385 opamp - 50k 10 turn pot - 1 Ohm 5 Watt resistorrrr