Pro Micro-compatible 32u4 Breakout Board
This board is a heavily-modified Goldfish Rev. C. While the schematic, basic layout, pinout (of course) etc is essentially the same, it uses 0603 components instead of 0402 and has some other changes.
- Mid-mount USB-C connector using a low-profile USB C 2.0 connector.
- Pin-compatible with the original Pro Micro.
- 5 extra pins on the bottom like the Elite-C and Goldfish.
- Exposed USB data lines on 2.54mm grid.
- Easier to solder than the Goldfish.
- Has fuse unlike Goldfish.
- On-board power LED.
- Fully hand-solderable.
- 27/09/2020: Initial commit.
- 29/09/2020: Switched D1 size from SOD323 to SOD123.
- 13/10/2020: Updated to V1.1. Added F1 1206 500mA polyfuse.
- 17/10/2020: Updated to V1.2. Moved location of parts closer to center.
- 31/10/2020: Updated to V1.3. Added 0603 power indicator LED, changed R6 from 10k to 1k LED resistor.
- 29/11/2020: Updated to V1.4. Increased size of 3225 crystal pads, changed USB C THT holes back to single oval shape, added THT pad under 32u4 to allow for the entire thing to be hand-soldered easier.
- 3/12/2020: Updated to V1.5. Decreased size of 3225 crystal pads again and changed them to THT. Staggered components to allow for easier soldering.