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TP4056 USB charging board
Lithium ion/polymer charging board. dirt cheap on eBay, especially in multiples.
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XL6009 buck/boost converter
DC->DC buck/boost converter. Any boost converter capable of stepping from li-ion voltages (3.7-4.2) up to the requisite 5V will work so long as it fits in the handle.
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Arduino Pro Mini 3.3v (Atmega 328p)
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MPU6050 accelerometer
6 Degrees of Freedom accelerometer/gyroscope
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18650 Lithium Ion cell
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Optional: Pololu Mini Pushbutton Power Switch (version SV)
https://www.pololu.com/product/2809 Not strictly required, as you can get away with a slide switch, but a planned upgrade will make use of it.
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Optional: USB-A Female socket
this can be skipped if don't want to power external devices.
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WS2812B "neopixel" led strip
144 leds/meter density
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1000 uF capacitor
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470 ohm resistor
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Optional: Male/Female headers
I built in several wire disconnects out of headers to make simplify replacement and debugging of some components. If you want to solder everything, go nuts.
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