We're Gonna Need a Bigger Battery and a Voltage Logger

A project log for Be Better Bracelet

A simple, subtle wearable that can reinforce positive habits and track progress on stopping bad habits

Darian JohnsonDarian Johnson 04/13/2019 at 03:580 Comments

Last week, I tried a very simple proof of concept with a CR1220.

It worked for maybe 20 mins. 

The battery just didn't have enough capacity to power the haptic motor for any length of time. So, I'm going back to the drawing board, and looking at larger LIPO battery (which means by bracelet may be larger than I initially wanted it to be).

Unfortunately, I don't have the tools to test my new design properly. Specifically, I want to track battery performance (current and voltage) over time. I can't seem to find an off-the-shelf tool to do that for me, so I'm building my voltage logger with some leftover Adafruit parts I have on hand.

Specifically, I'm using:

I'll update this post later with a link to the voltage logger (I'll create it as a separate project, in case anyone else wants to leverage the code/design).