Dev board
About the Dev board
Dev board is an open source RP2040/RP2350 PCB design by rc-sr, published on GitHub under the MIT license. It is a 2-layer board measuring 65 × 66.2 mm, with 24 components from 19 distinct parts.
Its main chip is the C81582, from the RP2040/RP2350 family. Other key parts include the Pololu_Breakout_DRV8825. By type, the board carries 8 connectors, 6 capacitors, 4 modules, 4 resistors and 2 ICs.
It belongs with the robotics & motion and dev boards & breakouts designs in this gallery.
From the project
Modular robotic tentacle
Both motors share microstep configuration pins
All motor connectors map to the same pins of their corresponding DRV8825 modules
Main components on the Dev board
Dev board bill of materials (BOM)
24 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C81582 Pico | RPi_Pico_SMD_TH | U1 |
| 1 | C81582 L7805 | TO-220-3_Vertical | U2 |
| 4 | Pololu_Breakout_DRV8825 | Pololu_Breakout-16_15.2x20.3mm | A1, A2, A3, A4 |
| 1 | C37815 Motor 1 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J1 |
| 1 | C160391 UART | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J2 |
| 1 | C160389 Conn_01x11 | PinHeader_1x11_P2.54mm_Vertical | J3 |
| 1 | C37815 Motor 3 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J4 |
| 1 | C160391 Motor 2 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J5 |
| 1 | C160389 Motor 4 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J6 |
| 1 | C160391 CON-SOCJ-2155 | GRAVITECH_CON-SOCJ-2155 | J7 |
| 1 | C442299 DEBUG | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J8 |
| 2 | C3011705 100uf | CP_Radial_D6.3mm_P2.50mm | C1, C3 |
| 1 | C51210 100uf | CP_Radial_D6.3mm_P2.50mm | C2 |
| 1 | C100042 100uf | CP_Radial_D6.3mm_P2.50mm | C4 |
| 1 | C51210 0.33uf | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | C51210 0.1uf | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | C138033 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | C60490 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 2 | C3013344 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
Dev board design files
The KiCad project lives in the rc-sr/tentacle repository on GitHub; these links point at the commit this page was built from.
Dev board: common questions
What microcontroller does the Dev board use?
The Dev board is built around the C81582, from the RP2040/RP2350 family.
How big is the Dev board?
The Dev board measures 65 × 66.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dev board?
24 components, from 19 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 Dev board design files?
From the rc-sr/tentacle 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 Dev board design in my own project?
Yes, under the terms of its MIT license, which rc-sr chose for the repository.
Can I test firmware for the Dev board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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