12 open source boards using the 25MHZ
Real designs built with the 25MHZ, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
ESP32Bitaxe
skot
56.5 × 99.8 mm86 parts4LCERN-OHL-S-2.01.4k
ESP32BitaxeGamma
bitaxeorg
56.5 × 99.8 mm90 parts4LCERN-OHL-S-2.0418
ESP32BitaxeSupra
56.5 × 99.8 mm89 parts4LCERN-OHL-S-2.034
NerdOCTAXE-Plus
Patsch91
155.5 × 130 mm290 parts4LCERN-OHL-S-2.033
ESP32BitaxeUltra
56.5 × 99.8 mm85 parts4LCERN-OHL-S-2.024
PC-AXE
aadhi1014
312 × 111.2 mm533 parts6LTAPR-OHL-1.09
ESP32Bittyaxe
BeeEvolved
55.5 × 66.9 mm85 parts4LCERN-OHL-S-2.07- schematic only · 1344 partsRP2040/RP2350
LZ-1-Backplane
HynixCJR
1344 parts2LNo license1 
STM32Qaxe
imcmurray
89 × 137 mm192 parts4LNo license0
ESP32BitaxeUltra
BennetLeff
56.5 × 99.8 mm86 parts4LCustom license1
Nerdqaxe+
89 × 152 mm183 parts4LNo license0
ESP32BitaxeGamma
56.5 × 99.8 mm90 parts4LNo license0
The 25MHZ in open source designs
The gallery holds 12 open source boards using the 25MHZ from 10 GitHub repositories; a typical one measures about 56.5 × 99.8 mm and carries around 90 components.
92% use four copper layers or more, and 58% carry an open source license.
The most starred is Bitaxe by skot.
Parts used alongside the 25MHZ
Microcontrollers on boards using the 25MHZ
What boards using the 25MHZ are built for
25MHZ: common questions
Where can I find a 25MHZ reference design?
Each of the 12 boards on this page is a real design using the 25MHZ. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the 25MHZ?
The MCP1824T-0802E, EMC2101, ESP32-S3-WROOM-1, RT9080-33GJ5 and BM1370_MODE1 appear in the most repositories here.
Which microcontrollers do boards using the 25MHZ use?
Most are built on ESP32 (7), RP2040/RP2350 (1) and STM32 (1).
How big is a typical board using the 25MHZ?
The median is 56.5 × 99.8 mm, and 8% are two-layer designs.
What is the most popular open source board using the 25MHZ?
By GitHub stars, Bitaxe by skot, with 1,372 stars.
Can I simulate one of these boards using the 25MHZ before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.