OHAK 131
About the OHAK 131 PCB
OHAK 131 is an open source PCB design by biomurph, published on GitHub. It is a 4-layer board measuring 38.1 × 25.4 mm, with 48 components from 23 distinct parts.
Other key parts include the rfd_77101, MAX30100, MIC5365-1.8YMT-TZ, BMI160 and MCP73831T-2ATI/OT. By type, the board carries 16 capacitors, 10 resistors, 8 ICs, 4 switches, 3 diodes and 2 connectors.
From the project
Place for OHAK prototypes
Main components on the OHAK 131
OHAK 131 bill of materials (BOM)
48 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | rfd_77101 | RFD77101 | U1 |
| 1 | MAX30100 | MAX30100 | U2 |
| 1 | MIC5365-1.8YMT-TZ | MLF-4 1mm x 1mm | U3 |
| 1 | BMI160 | LGA_2.5x3 | U4 |
| 1 | MCP73831T-2ATI/OT | SOT-23-5 | U5 |
| 1 | MIC5365-3.0YMT-TZ | MLF-4 1mm x 1mm | U6 |
| 1 | TXS0102DQER | X2SON8_1.4mm_x_1mm | U7 |
| 1 | MAX809SQ308T1G | SOT-323_SC-70 | U8 |
| 1 | M50-3140845 | M50-3140845_1x8_SMT_F | P1 |
| 1 | USB_OTG | 10118193_microUSB | P2 |
| 1 | Battery | JST_SH_SM02B-SRSS-TB_02x1.00mm_Angled | BT1 |
| 4 | C_1206 | C_1206 | S1, S2, S3, S4 |
| 4 | Watch_Pin_50mil | Watch_Pin_50mil | W1, W2, W3, W4 |
| 1 | ASMB-KTF0-0A306 | CLMVB-FKA-CFHEHLCBB7a363 | D1 |
| 1 | D_Schottky | C_0603 | D2 |
| 1 | 18-225SURSYGC/S530-A4/E4/TR8 | 0606_Bi-Color | D3 |
| 5 | 0.1uF | C_0402 | C1, C7, C10, C15, C16 |
| 8 | 1uF | C_0402 | C2, C4, C6, C8, C9, C12, C13, C14 |
| 3 | 10uF | C_0402 | C3, C5, C11 |
| 3 | 10K | C_0402 | R1, R2, R14 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100R | C_0402 | R5, R12, R17 |
| 2 | 1M | C_0402 | R7, R8 |
| 2 | 470 | C_0402 | R13, R15 |
OHAK 131 design files
The KiCad project lives in the biomurph/OHAK_Hardware repository on GitHub; these links point at the commit this page was built from.
- LayoutOHAK_131.kicad_pcb
OHAK 131: common questions
How big is the OHAK 131 PCB?
The OHAK 131 measures 38.1 × 25.4 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the OHAK 131?
48 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the OHAK 131 design files?
From the biomurph/OHAK_Hardware repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the OHAK 131 design in my own project?
The repository has no license, so all rights stay with biomurph. Use it as a reference, and ask the author before reusing the design.
