Tiny Pack v3b

This 3D printed case combines common parts into a small programmable controller with battery and charger, allowing access to all pins without opening the package. The total cost of this setup is less than $5, though you may have to buy multiple pieces of some components to reach that price.

The Bill of Materials includes:
- DigiSpark (or clone) ATtiny85, Arduino compatible controller with USB [example link](https://www.ebay.com/itm/Digispark-Kickstarter-ATTINY85-Micro-USB-Development-Board-for-Arduino-US-Stock/382601637894)
- LiPo charger with TP4056 (battery pass-through, USB 5V input) [example link](https://www.ebay.com/itm/5pcs-5V-1A-Micro-USB-18650-Lithium-Battery-TP4056-Charging-Board-Charger-Module)
- 300mAh LiPo power cell. [example link](https://www.ebay.com/itm/2Pcs-602030-3-7V-300mAh-LiPo-Battery-Power-For-MP3-MP4-Bluetooth-Headset-Speaker/133025349851)
- Two tall microswitches [example link](https://www.ebay.com/itm/10Pcs-Tactile-Push-Button-Switch-Tact-Switch-6X6X