2 layers40 × 20 mm
2 layers55.9 × 28.6 mm
ProMicro E28
dkmr27/ProMicro-E28PCB for nRF52840 ProMicro and Ebyte E28-2G4mxxS modules
- Size
- 55.9 × 28.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 25
- Pads
- 58
- Tracks, vias
- 67, 45
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Jul 2026
- Updated
- 13 Jul 2026
Overview
ProMicro E28 is an open-source printed circuit board by dkmr27, from the dkmr27/ProMicro-E28 repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 55.9 × 28.6 mm with 13 parts on 25 nets, routed with 67 tracks and 45 vias.
Its parts include 4 connectors, 2 capacitors, 2 resistors and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdProMicro-E28
A PCB for nRF52840 promicro using Ebyte E28-2G4MxxS modules
The production folder contains a .zip file suitable for PCB production (JLCPCB etc.)
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1M | Resistor_SMD:R_1206_3216Metric | R1, R2 |
| 2 | ~ | Connector_PinSocket_2.54mm:PinSocket_1x13_P2.54mm_Vertical | J1, J2 |
| 1 | 100nf | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 47uf 6.3v Tant | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_HandSolder | C1 |
| 1 | Batt | Connector_Wire:SolderWire-0.75sqmm_1x02_P4.8mm_D1.25mm_OD2.3mm | J4 |
| 1 | E28-2G4M2xSX | Ebyte E28 2G420SX:PE28(2G4M20SX) | J3 |
| 1 | RST | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW1 |
The 9 most common of 13 parts.
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Questions
How big is the ProMicro E28 PCB?
It measures 55.9 × 28.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ProMicro E28 use?
13 parts. 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 ProMicro E28 KiCad files?
From the dkmr27/ProMicro-E28 repository on GitHub, at the commit this page was made from: the board is ProMicro-E28.kicad_pcb and its schematic ProMicro-E28.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ProMicro E28 design in my own project?
Its repository publishes it under the CERN-OHL-P-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).