65 lines
3 KiB
Markdown
65 lines
3 KiB
Markdown
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# Notes
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## Boards
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- Raspberry Pi Zero 2 W - cheapest option
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- No battery charging
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- Consumes more power even if it had a battery
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- ItsyBitsy M4 Express w/ WiFi
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- Can get the M4 via the Hack Club store
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- WiFi (Bitsy AirLift) is $15 from AdaFruit, can also be bought on Digikey
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- WiFi uses a lot of power relatively
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- No battery charging
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- Adafruit nRF52840 Feather ([link](https://www.adafruit.com/product/4062)) ([digikey](https://www.digikey.com/en/products/detail/adafruit-industries-llc/4062/9843410))
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- $25
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- Has Bluetooth - lower energy
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- Has battery charging built-in
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## Displays
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- [Various E-ink displays from Adafruit](https://www.digikey.com/en/products/filter/evaluation-boards/expansion-boards-daughter-cards/797?s=N4IgjCBcpmAMVQGMoBcBOBXApgGhAPZQDaIALABxgDM1ArCPtWbQOwCcjIztVXP1CgCZ%2BLQdVG8AbFzLshrOpyZiKZSYNayhdMFPUreDQ4IpddZIWQj4qdMnRn4HNKU-JV2cTgF18AB1QoEABlDABLADsAcxAAX3wAWghoEBRIDBx8IkhSMDohMx84hJAZVPCAE2DkuBsQQOCuVABPf2xggEMAZxQSoA)
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- 2.13" tri-color looks promising
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- Or monochrome (more colors vs faster update speeds)
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- NVM *BAD OPTION*: 3-15 seconds for updates (monochrome vs color), 3 minutes between full refreshes
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- I don't want to have to code carefully around doing full refreshes
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- And 3 seconds even isn't great, but is usable
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- [OLED display with controls](https://www.adafruit.com/product/3531)
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- [OLED display with 3 buttons](https://www.adafruit.com/product/4650) ([digieky](https://www.digikey.com/en/products/detail/adafruit-industries-llc/4650/13170952))
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- 10mA power draw
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- Any leftover buttons can be user-assignable
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## Controls
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- Joystick things
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- [Joystick with button](https://www.adafruit.com/product/512)
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- [Slim joystick](https://www.adafruit.com/product/2765)
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- [Breakout board](https://www.adafruit.com/product/3246)
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- Similar: [PSP 3000 joystick](https://www.adafruit.com/product/444)
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- Easier to mount?
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- [5-way switch](https://www.adafruit.com/product/504)
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- [Cap](https://www.adafruit.com/product/4697)
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- Possible control scheme:
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- Menu/list system
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- Up and down to go through the list
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- Click certain button to engage with sub-menu (like a slider or something)
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- Left and right to go in and out of sub-menus
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- Another button to click in sub-menu
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## Other
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- Headers:
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- [Short female headers](https://www.adafruit.com/product/2940) ([digikey](https://www.digikey.com/en/products/detail/adafruit-industries-llc/2940/5848449))
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- [Short male headers](https://www.adafruit.com/product/3002) ([digikey](https://www.digikey.com/en/products/detail/adafruit-industries-llc/3002/6827172))
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- Batteries:
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- [18650](https://www.adafruit.com/product/1781) - can make a triangle shape so it sits nicely in my desk, 2200mAh (lasts ~36 hrs)
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- [flat lipo](https://www.adafruit.com/product/3898) - flat and small (lasts ~7 hrs)
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## not final but somewhat thought-out and researched plan
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- nRF52840 Feather
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- 128x64 OLED FeatherWing
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- Some kind of joystick
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- Headers, obviously
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- 3d print some decent caps for the buttons
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