Test battery capacity, and research battery switch - Githubissues

cherking19 / EC463_SmartExerciseSystem

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Test battery capacity, and research battery switch #54

Closed carltonknox closed 1 year ago

carltonknox commented 1 year ago

Current Draw for ptototype:

when powered off but connected ot battery: leakage current of 16-28 mA
when power on button held: 400mA
when device powered on and button released: 133-175mA (oscillating due to haptic motor) Power:
assuming a constant current of around 170mA,
170mA*9V = 1.53 watts

Some example batteries: https://www.amazon.com/EBL-USB-Rechargeable-Lithium-Batteries/dp/B086GTFGPP - 5400mWh - > 3.5 hours battery life (rechargable)

https://www.amazon.com/Rechargeable-Batteries-SHENMZ-All-Purpose-Charging/dp/B09Y33LRYX/ -1300mAh -> 7.4 hours battery life (rechargable)

carltonknox commented 1 year ago

Battery control circuit has been designed and documented in the hardware folder readme.md.

We should probably design a PCB board in EAGLE to make wiring the 10 arduinos easier. Also, we now have some additional hardware requirements (resistors, diodes, transistors). Also we need to buy one more arduino because one of them burnt out while testing the battery control design. Diodes are important.

I made some eagle files, but I'm not done with the design. I know a professor mentioned a pcb fabricator they had.