Open micro sister
About the Open micro sister PCB
Open micro sister is an open source PCB design by TomBonness, published on GitHub under the Custom license license. It is a 4-layer board measuring 91 × 91 mm, with 73 components from 51 distinct parts.
Other key parts include the E73-2G4M08S1C, BQ24074RGTR, TPS61023DRLR, SN74AHCT1G125DBVR and AT42QT1010-TSHR. By type, the board carries 30 capacitors, 17 resistors, 9 diodes, 6 ICs, 3 connectors and 2 transistors.
It belongs with the keyboards and iot & wireless designs in this gallery.
From the project
Open-source USB/BLE desktop programming controller with RGB status integration
Open Micro is an original open-source 96 × 96 mm desktop programming controller. Its industrial stack uses a CNC 6061-T6 aluminum bottom, a continuous neutral-frosted polycarbonate light-carrying wall, and a matte-black control PCB as the exposed structural top. A lower sister PCB carries the MCU, power, USB, RF, and eight hidden wall emitters.
This repository describes an unqualified two-board first article. Automated source, protocol, host, firmware, fabrication, CAD, collision, and artifact checks are design evidence only. No fabricated unit has completed docs/qualification.md; do not…
Main components on the Open micro sister
Open micro sister bill of materials (BOM)
73 components, 51 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | E73-2G4M08S1C | E73-2G4M08S1C | U1 |
| 1 | BQ24074RGTR | VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm | U2 |
| 1 | TPS61023DRLR | SOT-563 | U3 |
| 1 | SN74AHCT1G125DBVR | SOT-23-5 | U4 |
| 1 | AT42QT1010-TSHR | SOT-23-6 | U5 |
| 1 | TPS22919DCKR | SOT-363_SC-70-6 | U6 |
| 1 | BC856A BC856A PNP | SOT-23 | Q1 |
| 1 | MMBT3904 MMBT3904 NPN | SOT-23 | Q2 |
| 1 | Q13FC13500004 Q13FC13500004 32.768kHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | TYPE-C-31-M-12 | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | C173752 S2B-PH-K-S(LF)(SN) | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 1 | DNP TC2030-NL | Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | SMD1206P075TF | Fuse_1206_3216Metric | F1 |
| 1 | PCM12SMTR | SW_SPDT_PCM12 | SW13 |
| 1 | EVQP7A01P | EVQP7A01P | SW14 |
| 8 | SK6812MINI-E SK6812MINI-E side-facing | SK6812MINI-E_SideEmitter | D14, D15, D16, D17, D18, D19, D20, D21 |
| 1 | USBLC6-2SC6 | SOT-23-6 | D22 |
| 1 | NLCV32T-100K-EF NLCV32T-100K-EF 10uH | L_1210_3225Metric | L1 |
| 1 | XAL4020-102MEC XAL4020-102MEC 1uH | XAL4020 | L2 |
| 1 | CL05A475MP5NRNC 4.7uF VBUS local | C_0402_1005Metric | C1 |
Show 31 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CL31A226KPHNNNE 22uF SYS | C_1206_3216Metric | C3 |
| 1 | CL05A105KA5NQNC 1uF SYS | C_0402_1005Metric | C4 |
| 2 | CL05A475MP5NRNC 4.7uF SYS | C_0402_1005Metric | C5, C17 |
| 1 | 0402CG200J500NT 20pF XL1 | C_0402_1005Metric | C6 |
| 1 | 0402CG200J500NT 20pF XL2 | C_0402_1005Metric | C7 |
| 1 | CL05A106MQ5NUNC 10uF VDD | C_0402_1005Metric | C8 |
| 1 | CL31A226KPHNNNE 22uF boost in | C_1206_3216Metric | C9 |
| 1 | CL31A226KPHNNNE 22uF boost out | C_1206_3216Metric | C10 |
| 1 | 0402CG120J500NT 12pF feed-forward | C_0402_1005Metric | C11 |
| 15 | CL05B104KO5NNNC 100nF | C_0402_1005Metric | C12, C13, C15, C18, C19, C20, C34, C36 +7 |
| 1 | CL05B103KB5NNNC 10nF Cs | C_0402_1005Metric | C14 |
| 1 | CL05A105KA5NQNC 1uF touch | C_0402_1005Metric | C16 |
| 1 | CL31A226KPHNNNE 22uF SYS bulk | C_1206_3216Metric | C31 |
| 1 | CL05A475MP5NRNC 4.7uF BAT local | C_0402_1005Metric | C35 |
| 1 | 0402WGF5101TCE 5.1k CC1 | R_0402_1005Metric | R1 |
| 1 | 0402WGF5101TCE 5.1k CC2 | R_0402_1005Metric | R2 |
| 1 | 0402WGF3601TCE 3.6k 1% ISET | R_0402_1005Metric | R3 |
| 1 | RC0402FR-073K16L 3.16k 1% ILIM | R_0402_1005Metric | R4 |
| 1 | 0402WGF1002TCE 10k TS | R_0402_1005Metric | R5 |
| 1 | 0402WGF1004TCE 1M battery high | R_0402_1005Metric | R6 |
| 1 | 0402WGF3303TCE 330k battery low | R_0402_1005Metric | R7 |
| 1 | 0402WGF4701TCE 4.7k touch series | R_0402_1005Metric | R8 |
| 1 | 0402WGF3300TCE 330R RGB | R_0402_1005Metric | R9 |
| 1 | 0402WGF1003TCE 100k CHG pullup | R_0402_1005Metric | R10 |
| 1 | 0402WGF1003TCE 100k PGOOD pullup | R_0402_1005Metric | R11 |
| 1 | 0402WGF1002TCE 10k EN1 default | R_0402_1005Metric | R12 |
| 1 | 0402WGF1003TCE 100k NPN off | R_0402_1005Metric | R13 |
| 1 | 0402WGF4702TCE 47k USB auto base | R_0402_1005Metric | R14 |
| 1 | 0402WGF1003TCE 100k PNP off | R_0402_1005Metric | R15 |
| 1 | 0805W8J0754T5E 750k boost high | R_0805_2012Metric | R16 |
| 1 | 0402WGF1003TCE 100k boost low | R_0402_1005Metric | R17 |
Open micro sister design files
The KiCad project lives in the TomBonness/open-micro repository on GitHub; these links point at the commit this page was built from.
Open micro sister: common questions
How big is the Open micro sister PCB?
The Open micro sister measures 91 × 91 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Open micro sister?
73 components, from 51 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 Open micro sister design files?
From the TomBonness/open-micro 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 Open micro sister design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
More boards in open-micro
Similar boards
Lily58 Pro BOTTOM
kata0510
142.5 × 106.3 mm5 parts2LMIT2.3k
Lily58 Pro
142.5 × 106.3 mm83 parts2LMIT2.3k
Lily58
142.5 × 106.3 mm83 parts2LMIT2.3k
Lily58 Lite Rev3 TOP Case
142.5 × 106.4 mm34 parts2LMIT2.3k
KLOR
GEIGEIGEIST
160.2 × 118.3 mm79 parts2LGPL-3.01.2k
Pcb top
tompi
132.5 × 95.1 mm18 parts2LCC-BY-4.01.2k