Opsum
About the Opsum PCB
Opsum is an open source PCB design by nitefood, published on GitHub under the MIT license. It is a 2-layer board measuring 80 × 50 mm, with 41 components from 20 distinct parts.
Other key parts include the CH340N, ADUM1201ARZ-RL7 and INA226AIDGSR. By type, the board carries 15 capacitors, 14 resistors, 4 diodes, 3 ICs, 2 LEDs and 1 transistor.
From the project
OPSUM - The Open PSU Meter project
This folder hosts electrical and manufacturing design assets for the OPSUM PCB.
- The OPSUM PCB was designed entirely using the KiCad v10.0 EDA software.
1. Login to JLCPCB and click the Get Instant Quote button 2. Click "Add gerber file" and upload the Gerber .zip archive 3. Layers count and PCB size will be both autodetected from the Gerber files. You can leave all settings as they are. Optionally, you may prefer setting Surface Finish to LeadFree HASL, but the default will do just fine 4. Scroll to the bottom of the page and enable the PCB Assembly toggle. Keep the default values there…
Main components on the Opsum
Opsum bill of materials (BOM)
41 components, 20 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH340N | JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | ADUM1201ARZ-RL7 ADuM1201AR | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | INA226AIDGSR INA226 | TSSOP-10_3x3mm_P0.5mm | U4 |
| 1 | HL2309 | SOT-23-3 | Q1 |
| 1 | KH-TYPE-C-16P | KINGHELM_KH-TYPE-C-16P | J1 |
| 1 | SK22D02G5 DPDT | SW-TH_SK22D02G5 | SW1 |
| 2 | KT-0805G GREEN | LED_0805_2012Metric | LED1, LED2 |
| 2 | SS14 | D_SMA | D1, D3 |
| 1 | SMAJ36A | D_SMA | D2 |
| 1 | MMSZ5242B | D_SOD-123 | D4 |
| 2 | CL31A106KBHNNNE 10u | C_1206_3216Metric | C1, C11 |
| 9 | CC0603KRX7R9BB104 100n | C_0603_1608Metric | C2, C3, C4, C5, C6, C7, C8, C9 +1 |
| 4 | CL31A476MPHNNNE 47u | C_1206_3216Metric | C12, C13, C14, C15 |
| 4 | 0603WAF5101T5E 5K1 | R_0603_1608Metric | R1, R2, R11, R12 |
| 3 | 0402WGF1002TCE 10K | R_0402_1005Metric | R3, R4, R8 |
| 1 | WSL36373L000FEA 3mR | WSL3637_VIS | R5 |
| 2 | TC0225B100JTCC 10R | R_0402_1005Metric | R6, R7 |
| 1 | 0402WGF3300TCE 330R | R_0402_1005Metric | R9 |
| 1 | 0402WGF1003TCE 100K | R_0402_1005Metric | R10 |
| 2 | 0603WAF2201T5E 2K2 | R_0603_1608Metric | R13, R14 |
Opsum design files
The KiCad project lives in the nitefood/opsum repository on GitHub; these links point at the commit this page was built from.
Opsum: common questions
How big is the Opsum PCB?
The Opsum measures 80 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Opsum?
41 components, from 20 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 Opsum design files?
From the nitefood/opsum 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 Opsum design in my own project?
Yes, under the terms of its MIT license, which nitefood chose for the repository.