Arm
About the Arm PCB
Arm is an open source NXP PCB design by Krishnapriya1711, published on GitHub. It is a 2-layer board measuring 100 × 90 mm, with 34 components from 11 distinct parts.
Its main chip is the TEENSY 4.1, from the NXP family. By type, the board carries 28 connectors, 3 resistors, 1 IC, 1 transistor and 1 diode.
From the project
PCB design files
This repository contains the schematic and PCB design files for a plug-and-play microcontroller-based control board built around the Teensy 4.1, developed for robotic applications.
The design emphasizes modularity, flexibility, and ease of integration, allowing the same controller board to be reused across multiple robotic systems.
Main components on the Arm
Arm bill of materials (BOM)
34 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TEENSY 4.1 TEENSY_4.1 | TEENSY41 | IC1 |
| 1 | 2N3904 | TO-92L_Wide | Q1 |
| 4 | Conn_01x02_Pin | JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1, J2, J3, J4 |
| 2 | Conn_01x03_Pin | JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J5, J9 |
| 2 | Conn_01x04_Pin | JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J6, J8 |
| 2 | Conn_01x06_Pin | JST_EH_B6B-EH-A_1x06_P2.50mm_Vertical | J7, J11 |
| 18 | Conn_01x01_Pin | PinHeader_1x01_P2.54mm_Vertical | J12, J13, J14, J15, J16, J26, J27, J29 +10 |
| 1 | LED | LED_D3.0mm_Horizontal_O1.27mm_Z6.0mm | D1 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 270 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
Arm design files
The KiCad project lives in the Krishnapriya1711/pcb repository on GitHub; these links point at the commit this page was built from.
Arm: common questions
What microcontroller does the Arm use?
The Arm is built around the TEENSY 4.1, from the NXP family.
How big is the Arm PCB?
The Arm measures 100 × 90 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Arm?
34 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Arm design files?
From the Krishnapriya1711/pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Arm design in my own project?
The repository has no license, so all rights stay with Krishnapriya1711. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Arm without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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