M1-ubmc
About the M1-ubmc PCB
M1-ubmc is an open source PCB design by kernelorg-mirror, published on GitHub under the MIT license. It is a 2-layer board measuring 32.4 × 52.4 mm, with 23 components from 12 distinct parts.
Other key parts include the FUSB302BMPX, 74AVC1T45GW,125, RS2227XN and TLV70212DBVR. By type, the board carries 8 capacitors, 6 ICs, 6 resistors, 2 connectors and 1 transistor.
From the project
Central Scrutinizer gadget
This is a KiCad project allowing to control an Apple M1/M2. It started its life as "m1-ubmc", but its real name is "Central Scrutinizer".
Basically a FUSB302, a couple of level shifters and a RPi Pico. The project has the component references for JLCPCB except for the Pico, and is (at the time of writing), pretty cheap to build. Gives you serial, reboot control and USB passthrough over a micro-USB connector.
Main components on the M1-ubmc
M1-ubmc bill of materials (BOM)
23 components, 12 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | FUSB302BMPX | WQFN-14-1EP_2.5x2.5mm_P0.5mm_EP1.45x1.45mm | U1 |
| 2 | 74AVC1T45GW,125 | SC-88-6_L2.0-W1.3-P0.65-LS2.1-BL | U2, U3 |
| 2 | RS2227XN RUNIC(润石) | MSOP-10_L3.0-W3.0-P0.50-LS5.0-BL | U5, U6 |
| 1 | TLV70212DBVR TLV70212_SOT23-5 | SOT-23-5 | U7 |
| 1 | AO3400A | SOT-23-3 | Q1 |
| 1 | 105450-0101 | USB-C-SMD_TYPE-C-USB-18 | J1 |
| 1 | 1050171001 | MICRO-USB-SMD_1050171001 | J2 |
| 2 | 470PF 470pF | C_0402_1005Metric | C1, C2 |
| 4 | 0.1UF 0.1uF | C_0402_1005Metric | C3, C4, C5, C6 |
| 2 | 1UF 1uF | C_0402_1005Metric | C7, C8 |
| 4 | 4.7K 4.7k | R_0402_1005Metric | R1, R2, R5, R6 |
| 2 | 10K | R_0402_1005Metric | R3, R4 |
M1-ubmc design files
The KiCad project lives in the kernelorg-mirror/linux_kernel_git_maz_cs-hw repository on GitHub; these links point at the commit this page was built from.
- Layoutm1-ubmc.kicad_pcb
- Schematicm1-ubmc.kicad_sch
- BOMproduction/bom.csv
M1-ubmc: common questions
How big is the M1-ubmc PCB?
The M1-ubmc measures 32.4 × 52.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the M1-ubmc?
23 components, from 12 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the M1-ubmc design files?
From the kernelorg-mirror/linux_kernel_git_maz_cs-hw repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the M1-ubmc design in my own project?
Yes, under the terms of its MIT license, which kernelorg-mirror chose for the repository.
