Carpo left
About the Carpo left PCB
Carpo left is an open source Nordic nRF PCB design by heyitscassio, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 126.3 × 92.7 mm, with 64 components from 27 distinct parts.
Its main chip is the nRF52840_holyiot_18010, from the Nordic nRF family. Other key parts include the XC6206P LDO and MCP73831. By type, the board carries 21 diodes, 19 switches, 9 resistors, 5 capacitors, 3 ICs and 2 connectors.
It belongs with the keyboards designs in this gallery.
From the project
Carpo is a 36 keys, low profile, choc spaced, split keyboard.
Main components on the Carpo left
Carpo left bill of materials (BOM)
64 components, 27 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | nRF52840_holyiot_18010 | nRF52840_holyiot_18010 | U1 |
| 1 | XC6206P LDO | SOT-23 | U2 |
| 1 | MCP73831 | SOT-23-5 | U3 |
| 1 | AO3401A | SOT-23 | Q1 |
| 1 | USB_C_Receptacle | USB-C_C168688 | J1 |
| 1 | BATT_CONN1 | Molex_Pico-EZmate_78171-0002_1x02-1MP_P1.20mm_Vertical | J2 |
| 1 | USBLC6-2P6 | SOT-666 | ESD1 |
| 1 | 500mA | Fuse_0805_2012Metric | F1 |
| 1 | SWD | Header_SWD | JSWD1 |
| 1 | SW_Push | Panasonic_EVQPUL_EVQPUC | R_TACT1 |
| 17 | SW_SPST | SW_choc_v1_HS_CPG135001S30_1u | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +9 |
| 1 | SW_SPST | SW_choc_v1_HS_CPG135001S30_1.5u | SW18 |
| 1 | ON_OFF | SW_SPDT_PCM12 | SW19 |
| 18 | 1N4148 | D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8 +10 |
| 1 | 1N5819W | D_SOD-123 | D19 |
| 1 | RED | LED_0603_1608Metric | D20 |
| 1 | Blue LED | LED_0603_1608Metric | D21 |
| 1 | 1nF | C_0603_1608Metric | C1 |
| 2 | 4.7uF | C_0603_1608Metric | C4, C5 |
| 2 | 1uF | C_0603_1608Metric | C6, C7 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 5.1K | R_0603_1608Metric | R1, R2 |
| 1 | 1M | R_0603_1608Metric | R3 |
| 1 | 100k | R_0603_1608Metric | R4 |
| 2 | 1k | R_0603_1608Metric | R5, R9 |
| 1 | RPROG | R_0603_1608Metric | R6 |
| 1 | 806/820k | R_0603_1608Metric | R7 |
| 1 | 2M | R_0603_1608Metric | R8 |
Carpo left design files
The KiCad project lives in the heyitscassio/carpo repository on GitHub; these links point at the commit this page was built from.
- Layoutpcb/left/carpo_left.kicad_pcb
- Schematicpcb/left/carpo_left.kicad_sch
Carpo left: common questions
What microcontroller does the Carpo left use?
The Carpo left is built around the nRF52840_holyiot_18010, from the Nordic nRF family.
How big is the Carpo left PCB?
The Carpo left measures 126.3 × 92.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Carpo left?
64 components, from 27 distinct parts. The full bill of materials is listed on this page.
Where can I download the Carpo left design files?
From the heyitscassio/carpo repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Carpo left design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which heyitscassio chose for the repository.
Can I test firmware for the Carpo left without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.
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