Lamium
About the Lamium PCB
Lamium is an open source RISC-V PCB design by b4ck5p4c3, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 83 × 62 mm, with 45 components from 18 distinct parts.
Its main chip is the CH32V003AxMx, from the RISC-V family. Other key parts include the AMS1117-5.0 and SN75176BDR. By type, the board carries 15 resistors, 9 connectors, 7 diodes, 5 capacitors, 4 transistors and 3 ICs.
From the project
🏭 Series of weird space automation devices
Endpoint-style device with four inputs and four outputs.
- Inputs: Four non-isolated discrete inputs (0 to 12V). - Outputs: Four non-isolated outputs (12V, 1A max). - Power: 7-12V DC input. Logic is fused at 0.75A, IO is not fused. - Connectivity: Single 8P8C connector for Modbus RTU over RS-485.
- Address: individual for each device, set in firmware. - Port configuration: 115200, 8N1
Main components on the Lamium
Lamium bill of materials (BOM)
45 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-5.0 | SOT-223-3_TabPin2 | U1 |
| 1 | SN75176BDR | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | CH32V003AxMx | SOP-16_3.9x9.9mm_P1.27mm | U3 |
| 4 | AO3402A | SOT-23 | Q1, Q2, Q3, Q4 |
| 8 | MC 1,5/2G-3,81 | PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_Horizontal | J1, J2, J3, J4, J6, J7, J8, J9 |
| 1 | 8P8C | Connfly_DS1134 | J5 |
| 1 | MF-SM075-2 | FUSE-SMD_L7.4-W5.4 | F1 |
| 1 | 100R | R_1206_3216Metric | Rterm1 |
| 4 | LL4448 | D_MiniMELF | D1, D3, D4, D5 |
| 1 | PESD15VS2UT,215 PESD15VL2BT | SOT-23 | D2 |
| 2 | PESD15VS2UT,215 PESD15VS2UT | SOT-23 | D6, D7 |
| 2 | 10nF | C_1206_3216Metric | C1, C2 |
| 2 | 100nF | C_1206_3216Metric | C3, C4 |
| 1 | 100pF | C_1206_3216Metric | C5 |
| 4 | 220R | R_1206_3216Metric | R1, R6, R8, R10 |
| 3 | 4K7 | R_1206_3216Metric | R2, R3, R4 |
| 4 | 10K | R_1206_3216Metric | R5, R7, R9, R11 |
| 4 | 470R | R_1206_3216Metric | R12, R13, R14, R15 |
Lamium design files
The KiCad project lives in the b4ck5p4c3/lambium repository on GitHub; these links point at the commit this page was built from.
Lamium: common questions
What microcontroller does the Lamium use?
The Lamium is built around the CH32V003AxMx, from the RISC-V family.
How big is the Lamium PCB?
The Lamium measures 83 × 62 mm, has 2 copper layers and is 1.58 mm thick.
How many components are on the Lamium?
45 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the Lamium design files?
From the b4ck5p4c3/lambium repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Lamium design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which b4ck5p4c3 chose for the repository.
Can I test firmware for the Lamium without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.
More boards in lambium
Similar boards
RISC-VAudio
byrantech
27.8 × 22.3 mm38 parts2LMIT4.3k
RISC-VWorkbench-1 Controller
Quchaosheng
160 × 130 mm106 parts8LApache-2.0129
RISC-VFroggyswadge
cnlohr
81.5 × 72.2 mm92 parts2LMIT105
RISC-VKeytartouch
152.5 × 117.5 mm69 parts2LMIT105
RISC-VCh32v003f4u6 with wsled
40.6 × 44.5 mm26 parts2LMIT105
RISC-VRVPC Rev B
OLIMEX
31 × 50 mm26 parts2LGPL-3.098