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CL Rev. B
by
musl.
2
layer board of
1.00x0.44
inches
(25.43x11.20
mm).
Shared on
October 9th, 2016 05:20.
This is a V-USB development board meant to fit inside a metal (possibly scavenged) USB type-A shroud.
The thickness of the board and the shroud should be just about perfect to provide a nice, solid USB connection. The bottom layer also exposes traces that should be insulated from the shroud with kapton tape or similar. After all that, carefully superglue that lil' sucker inside the shroud. If you don’t want the ISP header, (or VBUS, GND, & GPIO pins) feel free to cut along the drills. The board /should/ be near flush with the edge of many shrouds.
Once the board is populated and firmware is flashed, it is software compatible with the Adafruit Trinket 5v. Rev A. successfully runs sketches in the same way a Trinket does - no extra steps required.
Notes:
- PB3 and PB4 are not broken out.
- D+ and D- are swapped from the Adafruit Trinket schematic, so you’ll have to alter the code to swap the V-USB pin assignments.
- It doesn’t have a regulator, a reset button, or any other schnazzy bells and whistles.
Changelog:
From Rev. A:
- Add LED on PB1 for bootloader status
- Tighter/smaller part footprints
- A narrower board that should fit in scavenged USB Type A Male shrouds
- Fiducial marks for machine vision
- Misc Layout improvements
CL Rev. A
by
musl.
2
layer board of
1.00x0.48
inches
(25.43x12.22
mm).
Shared on
September 1st, 2016 08:23.
This is a V-USB development board meant to fit inside a metal (possibly scavenged) USB type-A shroud.
The board will probably need to be sanded down on the long sides to fit well. The thickness of the board and the shroud should be just about perfect to provide a nice, solid USB connection. The bottom layer also exposes a VBUS trace that should be insulated from the shroud with kapton tape, solder-mask pen, etc. After all that, carefully superglue that lil' sucker inside the shroud. If you don’t want the ISP header, feel free to cut along the advertised line. The board /should/ be near flush with the edge of many shrouds.
Ideally, this design would be software compatible with the adafruit trinket 5v. D+ and D- are swapped from the adafruit schematic, so you’ll have to alter the code. It doesn’t support a regulator, have a reset button, or any other schnazzy bells and whistles, so YMMV.