2 layers27.9 × 16.5 mm
2 layers61 × 30.5 mm
ProMicro E22-22dBm
dkmr27/ProMicro-E22-22dBm1PCB for nRF52840 ProMicro and Ebyte E22-xxxM22S modules
- Size
- 61 × 30.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 25
- Pads
- 75
- Tracks, vias
- 85, 78
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Jul 2026
- Updated
- 15 Jul 2026
Overview
ProMicro E22-22dBm is an open-source printed circuit board by dkmr27, from the dkmr27/ProMicro-E22-22dBm repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 61 × 30.5 mm with 18 parts on 25 nets, routed with 85 tracks and 78 vias.
Its parts include 4 resistors, 4 connectors, 3 capacitors, 2 switches and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdProMicro-E22-22dBm
A PCB for nRF52840 promicro using Ebyte E22-xxxM22S 22dBm modules
As with a lot of my boards, the extra components are optional. Reset button and 2x 1M ohm 1206 (R1/R2) resistors recomended at minimum. A hardware low voltage reset IC was included in the design but never tested.
Compatible modules are:
- E22-170M22S SX1262 150MHz to 170MHz (works great at 173MHz)
- E22-400M22S SX1268 410MHz to 493MHz
- E22-900M22S SX1262 850MHz to 930MHz (works with MeshCore faketec firmware)
The production folder contains a .zip file suitable for PCB production (JLCPCB etc.)
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10k | Resistor_SMD:R_1206_3216Metric | R3, R4 |
| 2 | 1M | Resistor_SMD:R_1206_3216Metric | R1, R2 |
| 2 | ~ | Connector_PinSocket_2.54mm:PinSocket_1x13_P2.54mm_Vertical | J1, J2 |
| 1 | 100n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | 100nf | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 10uf 6.3v Tant | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_HandSolder | C1 |
| 1 | BOOT | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW1 |
| 1 | Batt | Connector_Wire:SolderWire-0.75sqmm_1x02_P4.8mm_D1.25mm_OD2.3mm | J4 |
| 1 | E22-xxxM22S | eByte:PE22(900M22S) | J3 |
| 1 | MCP100T-315I/TT | Package_TO_SOT_SMD:SOT-23_Handsoldering | U1 |
| 1 | RST | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW2 |
The 14 most common of 18 parts.
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Questions
How big is the ProMicro E22-22dBm PCB?
It measures 61 × 30.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ProMicro E22-22dBm use?
18 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 E22-22dBm KiCad files?
From the dkmr27/ProMicro-E22-22dBm repository on GitHub, at the commit this page was made from: the board is ProMicro-E22-22dBm.kicad_pcb and its schematic ProMicro-E22-22dBm.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ProMicro E22-22dBm 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).