2 layers91.4 × 17.8 mm
Connectorboard
loslab/easypace
Biphasic pulse generator for electrical stimulation of tissues
11 parts1BSD-3-Clause
2 layers78.7 × 69.9 mm
Easypace v3
loslab/easypace1Biphasic pulse generator for electrical stimulation of tissues
- Size
- 78.7 × 69.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 53
- Pads
- 145
- Tracks, vias
- 198, 1
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 Sep 2021
- Updated
- 13 Sep 2021
Overview
Easypace v3 is an open-source printed circuit board by loslab, from the loslab/easypace repository on GitHub, published under the BSD-3-Clause licence. It is a 2-layer board of 78.7 × 69.9 mm with 38 parts on 53 nets, routed with 198 tracks and 1 via.
It is built around the LM324, MCP4922-E/P and LM285Z-2.5. Its parts include 20 resistors, 7 connectors, 3 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
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
MCP4922-E/P
PDIP-14-40℃~+125℃ 0.25LSB、4LSB 12 2 2.7V~5.5V 350uA 4.5us Power-on reset、Power-down mode、Programmable gain SPI Voltage Buffer PDIP-14 Digital to Analog Converters (DAC) ROHSMicrochip TechnologyDigital To Analog Converters (DAC)
LM285Z-2.5
TO-92-3-40℃~+85℃@(Ta) 120uVrms 2.5V 20mA 80ppm/℃ Fixed Parallel ±1.5% TO-92-3 Voltage Reference ROHSonsemiVoltage Reference
README
README.mdEasypace
Open source biphasic pulse generator for electrical stimulation of tissues developed by Oliver Schneider at the µOrganoLab & Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB)
https://github.com/loslab/easypace
Easypace was originally built for pacing cardiac tissues in microfluidic Organ-on-Chip systems, however it can be certainly used for other purposes. It generates adjustable biphasic pulses with frequencies of ~ 0.1-10 Hz, amplitudes of up to ~ 12.5 V and pulsewidths of ~ 1 - 200 ms. Generally it can also be just an idea/ starting point for your own improved pacer :rocket:.
Features
- 2 independently controllable pulseforms, 4 outputs in total
- Arduino-based, beginner-friendly assembly, hand-solderable
- manual control as well as scriptable remote control
- fairly cheap (cost of all parts < 100 €)
Instructions
Check out the wiki for assembly & usage instructions
Problems, questions, bugs, feedback and suggestions
I'm not a trained electrial engineer, so don't expect a professional build. I tinkered around with Easypace during my phd studies to build a cheap, scaleable system for pacing multiple tissues in cardiac Organ-on-Chip systems which I could adjust to my needs and control remotely. We are happy about any feedback on Easypace. Just tell us if you have any improvement ideas and open a pull request or get in touch via ghilorevilo@posteo.de.
License
Please cite Easypace if it helps you in your research.
This project is licensed under a BSD 3-Clause license. See the LICENSE file for details.
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 11k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6, R7, R8, R9, R11, R13, R15 |
| 8 | 56k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R12, R14, R16, R17, R18, R19, R20 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3 |
| 2 | LED | LED_THT:LED_D5.0mm | D1, D2 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | Arduino_Nano_v3.x | easypace_fps:Arduino_Nano | A1 |
| 1 | Conn_Disp | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_Enc | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | Conn_Sigout1 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J6 |
| 1 | Conn_Sigout2 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J7 |
| 1 | Conn_Sigout3 | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J4 |
| 1 | Conn_Sigout4 | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J5 |
| 1 | Conn_Vin | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J1 |
| 1 | LM285Z-2.5 | Package_TO_SOT_THT:TO-92_Inline | U2 |
| 1 | LM324 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U3 |
| 1 | MCP4922 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U1 |
| 1 | SIM2-1215D | Converter_DCDC:Converter_DCDC_XP_POWER-IAxxxxS_THT | PS1 |
The 34 most common of 38 parts.
Questions
How big is the Easypace v3 PCB?
It measures 78.7 × 69.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Easypace v3 use?
38 parts, built around the LM324, MCP4922-E/P and LM285Z-2.5. 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 Easypace v3 KiCad files?
From the loslab/easypace repository on GitHub, at the commit this page was made from: the board is pcb/Easypace_v3/Easypace_v3.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Easypace v3 design in my own project?
Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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