Open Muscle Dev Kit Bracelet Cell
About the Open Muscle Dev Kit Bracelet Cell PCB
Open Muscle Dev Kit Bracelet Cell is an open source ESP32 PCB design by Open-Muscle, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 27.5 × 52 mm, with 22 components from 17 distinct parts.
Its main chip is the ESP32-C3-Super Mini, from the ESP32 family. Other key parts include the LTC4054ES5-4.2 and TPS7A03. By type, the board carries 5 capacitors, 4 connectors, 3 ICs, 3 resistors, 2 jumpers and 1 switch.
It belongs with the sensors, wearables and iot & wireless designs in this gallery.
From the project
Original OpenMuscle armband with 12 sensors (legacy design)
Status: Archived (Legacy Hardware) License: CERN-OHL-S v2.0
The OpenMuscle-Band is the original prototype of the OpenMuscle project—a wearable forearm band equipped with 12 pressure sensors designed to detect muscle contractions and predict finger movements. This open-source hardware was developed to provide biometric data for machine learning applications in prosthetics and human-computer interaction.
Main components on the Open Muscle Dev Kit Bracelet Cell
Open Muscle Dev Kit Bracelet Cell bill of materials (BOM)
22 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | ESP32-C3-Super Mini | U1 |
| 1 | LTC4054ES5-4.2 | TSOT-23-5 | U2 |
| 1 | TPS7A03 | SOT-23-5 | U5 |
| 2 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J2, J3 |
| 1 | JST_02 | JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J4 |
| 1 | Conn_01x05_Pin | PinHeader_1x05_P1.27mm_Vertical | J6 |
| 2 | A1369xUA-10 | Hall49E | H0, H1 |
| 2 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2 |
| 1 | ~ | SOT-23-6 | MAX1 |
| 1 | SW_Push | EVQP2P02M | SW2 |
| 1 | LED GREEN | LED_0805_2012Metric | D1 |
| 2 | 100 nF | C_0402_1005Metric | C1, C2 |
| 1 | 2.2 uF | C_0603_1608Metric | C5 |
| 2 | 4.7uF | C_0805_2012Metric | C9, C10 |
| 1 | 2.7k | R_0603_1608Metric | R1 |
| 1 | 150 | R_0603_1608Metric | R2 |
| 1 | 1K | R_0603_1608Metric | R8 |
Open Muscle Dev Kit Bracelet Cell design files
The KiCad project lives in the Open-Muscle/OpenMuscle-Band repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/OM-EPSC3-Micro.kicad_pcb
- SchematicKiCad/OM-EPSC3-Micro.kicad_sch
Open Muscle Dev Kit Bracelet Cell: common questions
What microcontroller does the Open Muscle Dev Kit Bracelet Cell use?
The Open Muscle Dev Kit Bracelet Cell is built around the ESP32-C3-Super Mini, from the ESP32 family.
How big is the Open Muscle Dev Kit Bracelet Cell PCB?
The Open Muscle Dev Kit Bracelet Cell measures 27.5 × 52 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Open Muscle Dev Kit Bracelet Cell?
22 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the Open Muscle Dev Kit Bracelet Cell design files?
From the Open-Muscle/OpenMuscle-Band repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Open Muscle Dev Kit Bracelet Cell design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Open-Muscle chose for the repository.
Can I test firmware for the Open Muscle Dev Kit Bracelet Cell without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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