Exohand Updated
About the Exohand Updated PCB
Exohand Updated is an open source NXP PCB design by muhammadmapkar, published on GitHub. It is a 2-layer board measuring 76 × 66 mm, with 26 components from 10 distinct parts.
Its main chip is the Teensy4.0, from the NXP family. Other key parts include the WEMOS_C3_mini. By type, the board carries 6 connectors, 2 ICs and 1 switch.
It belongs with the robotics & motion designs in this gallery.
From the project
EMG-controlled assistive robotic hand. Built for ECTE351 by Team Orvyn (Group 19).
EMG-controlled assistive robotic hand. Built for ECTE351 by Team Orvyn (Group 19).
ExoHand reads surface EMG (sEMG) from the forearm, classifies the muscle activity into a hand gesture, and drives four servo-actuated fingers to match. The current system recognizes rest, fist, and individual-finger gestures (pinky&ring, middle, index, thumb), running the trained classifier directly on the microcontroller. VR integration is planned; not yet in this codebase. — see docs/architecture.md. Runs the trained classifier on-device (no PC needed for inference).
Main components on the Exohand Updated
Exohand Updated bill of materials (BOM)
26 components, 10 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Teensy4.0 | Teensy40 | U1 |
| 1 | WEMOS_C3_mini | WEMOS_C3_mini | U3 |
| 1 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical_SMD_Pin1Left | J1 |
| 3 | Conn_01x06 | PinHeader_1x06_P2.54mm_Vertical_SMD_Pin1Left | J2, J3, J4 |
| 2 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical_SMD_Pin1Left | J5, J6 |
| 9 | C | C_0805_2012Metric | 0.1µF1, 470µF1, C_BAT_SENSE1, C_EN1, C_ESP_0P1, C_ESP_10U1, C_PCA_0P1, C_PCA_10U1 +1 |
| 1 | C_Polarized | CP_Radial_D8.0mm_P3.50mm | C_VBAT_BULK1 |
| 1 | Conn_01x02 | AMASS_XT30UPB-F_1x02_P5.0mm_Vertical | JBAT_MAIN1 |
| 6 | R | R_0805_2012Metric | R_BAT_BOT1, R_BAT_TOP1, R_EN1, R_I2C_SCL1, R_I2C_SDA1, R_UART_TX1 |
| 1 | SW_SPST | KCD1-101 | SW1 |
Exohand Updated design files
The KiCad project lives in the muhammadmapkar/Exohand_Project repository on GitHub; these links point at the commit this page was built from.
Exohand Updated: common questions
What microcontroller does the Exohand Updated use?
The Exohand Updated is built around the Teensy4.0, from the NXP family.
How big is the Exohand Updated PCB?
The Exohand Updated measures 76 × 66 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Exohand Updated?
26 components, from 10 distinct parts. The full bill of materials is listed on this page.
Where can I download the Exohand Updated design files?
From the muhammadmapkar/Exohand_Project repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Exohand Updated design in my own project?
The repository has no license, so all rights stay with muhammadmapkar. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Exohand Updated 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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