2 layers26 × 32.4 mm
OpenEMG2
CGrassin/OpenEMG
OpenEMG is an open-hardware, easy to make, EMG module to measure muscle activity.
32 parts54MIT
2 layers34 × 39 mm
Open Source Based sEMG. Based off of OpenEMG but with an added Voltage Follower for a theoretically more stable output.
- Size
- 34 × 39 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 26
- Pads
- 86
- Tracks, vias
- 170, 22
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Dec 2025
- Updated
- 24 Dec 2025
Overview
Emg is an open-source printed circuit board by karim1312, from the karim1312/emg repository on GitHub. It is a 2-layer board of 34 × 39 mm with 33 parts on 26 nets, routed with 170 tracks and 22 vias.
It is built around the LM324, LM321 and ICL7660M/TR, with the SS14 among its other parts. Its parts include 15 resistors, 8 capacitors, 4 connectors, 2 ICs and 1 diode.
Main components
4
LM324
SOP-14-1.5V~10V 0℃~+70℃ 24V 250nA 3V~20V 4 40mA 50nA 700uA 7mV 80dB SOP-14 Operational Amplifier ROHSHXY MOSFETOperational Amplifier
LM321
SOT-23-50℃~+70℃ 1 2mV 3nA 400V/ms 40mA 430uA 45nA 90dB SOT-23-5 Operational Amplifier ROHSPJSEMIOperational Amplifier
ICL7660M/TR
SOP-8-25℃~+60℃ 100Ω 10kHz 175uA 3V~9.5V 98% Inverted SOP-8 Charge Pumps ROHSHGSEMICharge Pumps
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R2, R9, R10, R13 |
| 3 | 10u | Capacitor_SMD:CP_Elec_6.3x4.5 | C6, C8, C9 |
| 3 | 18k | Resistor_SMD:R_0805_2012Metric | R7, R11, R15 |
| 3 | 47k | Resistor_SMD:R_0805_2012Metric | R3, R4, R14 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R8, R12 |
| 2 | 15k | Resistor_SMD:R_0805_2012Metric | R5, R6 |
| 2 | 330n | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 470n | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | Mounting_hole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | J5, J6 |
| 1 | 100k | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV1 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | Electrodes | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | ICL7660M/TR | Package_SO:SOP-8_3.76x4.96mm_P1.27mm | U3 |
| 1 | LM321 | Package_TO_SOT_SMD:SOT-23-5 | VF1 |
| 1 | LM324 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | LOGO | logos:mcgillbiomechanics | G*** |
| 1 | MCU_out | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | SS14 | Diode_SMD:D_SMA | D1 |
Questions
How big is the Emg PCB?
It measures 34 × 39 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Emg use?
33 parts, built around the LM324, LM321, ICL7660M/TR and SS14. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Emg KiCad files?
From the karim1312/emg repository on GitHub, at the commit this page was made from: the board is EMG.kicad_pcb and its schematic EMG.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Emg design in my own project?
Its repository states no licence, so its author keeps all rights: ask karim1312 before reusing the design.
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