2 layers89 × 100 mm
Hub16
joshajohnson/Hub16
A macro pad with 16 keys, two rotary encoders, a four port USB hub, and plenty of LEDs!
132 parts388
2 layers17.8 × 33 mm
Alvaro
Kaleidogeist/Alvaro53Pro Micro-compatible 32u4 Breakout Board
- Size
- 17.8 × 33 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 44
- Pads
- 162
- Tracks, vias
- 479, 58
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 27 Sep 2020
- Updated
- 24 Sep 2026
Overview
Alvaro is an open-source printed circuit board by Kaleidogeist, from the Kaleidogeist/Alvaro repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 17.8 × 33 mm with 28 parts on 44 nets, routed with 479 tracks and 58 vias.
It is built around the ATMEGA32U4. Its parts include 10 capacitors, 6 resistors, 5 connectors, 2 diodes and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdAlvaro
Pro Micro-compatible 32u4 Breakout Board
Disclaimer
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.
Key Features
- 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.
Changelog
- 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.
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0u1 | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C10 |
| 2 | 01x12 | Alvaro:Pins12 | J3, J4 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | 22p | Capacitor_SMD:C_0603_1608Metric | C7, C8 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 01x02 | Alvaro:Pins2 | J2 |
| 1 | 01x05 | Alvaro:Pins5 | J5 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 16MHz | Crystal:Crystal_SMD_SeikoEpson_FA238-4Pin_3.2x2.5mm | X1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | ATmega32U4 | Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm | U1 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123 | D1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LOGO | Alvaro:Catmelon_Smol | G*** |
| 1 | Polyfuse_Small | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | RAW | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | USB_C_Receptacle_USB2.0 | Alvaro:USB-C-C168688 | P1 |
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Questions
How big is the Alvaro PCB?
It measures 17.8 × 33 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Alvaro use?
28 parts, built around the ATMEGA32U4. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Alvaro KiCad files?
From the Kaleidogeist/Alvaro repository on GitHub, at the commit this page was made from: the board is Hardware/Alvaro.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Alvaro design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).