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6 layers30 × 48 mmHolter, the printed circuit board in 3D

MobilECG II is an open source clinical grade Holter ECG. For more information, please visit http://mobilecg.hu.

Size
30 × 48 mm
Copper layers
6
Thickness
1.6 mm
Parts
231
Nets
176
Pads
832
Tracks, vias
2,956, 352
Pours
8
Routed
Yes
KiCad
KiCad 4
Created
22 Mar 2016
Updated
8 Nov 2021

Overview

Holter is an open-source printed circuit board by peterisza, from the peterisza/mobilecg repository on GitHub. It is a 6-layer board of 30 × 48 mm with 231 parts on 176 nets, routed with 2,956 tracks and 352 vias.

It is built around the OPA379M/TR, TLV61220DBV and TS5A3159DBV, with the TXB0106PW, LIS2DH12 and USBULC6-2M6 among its other parts. Its parts include 106 capacitors, 56 resistors, 28 ICs, 6 connectors and 5 inductors. It belongs with the STM32 boards of this library.

Main components

9

README

README.md

MobilECG II

MobilECG II is an open source clinical grade Holter ECG. For more information, please visit http://mobilecg.hu.

NOTE: this is only a preliminary release. It contains known bugs, but its main structure will remain the same. There is no stable branch yet. Development occours on master. When a stable software is released, it will be split to separate stable and development branches.

Directory structure

text
MobilECG II
├─  CAD - OpenSCAD drawings for the case and other parts
├─  Hardware - the hardware design of MobilECG II
│
├───Software
│    ├─  AndroidApp - Android demo application for resting ECG
│    ├─  Common - Source code used both in firmware and host app
│    └─  Firmware - Firmware running on the microcontroller
|
└───CardECG - Toy, credit card ECG project.

How to get one?

MobilECG is not publicly available yet. In order to sell a medical device, certification is needed. We are working hard to bring MobilECG to the users as soon as possible.

However you can still build one yourself. If you want to build it, feel free to do so. Contact us in case of any problems. There will be soon a technical blog where you will be able to find instructions on bulding one yourself.

Compatibility

The whole project is built using free or open source tools. The hardware is designed in KiCAD (http://kicad-pcb.org), the firmware compiles with ARM GCC (you can find binaries here: https://launchpad.net/gcc-arm-embedded), CAD files are designed with OpenSCAD (http://www.openscad.org) and 3D printed using MatterControl on a Prusa i3. The development occours on Mac OS X and Linux, building was never tested on Microsoft Windows (and we are not interested in making this software build on Windows except the Windows client app that will be written).

How to support us?

If you know a doctor or someone with a heart condition, please let them know about our project. Their subscription will help us find investment.

If you are a business angel or an investor, please contact us.

License

The hardware is released under the Creative Commons Attribution-ShareAlike 4.0 International License. All software componens (except Bluetopia, STM32 peripherial libraries, FreeRTOS, and scmRTOS, which are freely available) are licensed under the GNU Public License v3. If you have any special license requirements, please feel free to contact us.

Parts

231
QtyValueFootprintReferences
41100nFCapacitors_SMD:C_0402C12, C13, C17, C100, C101, C105, C109, C110, C113, C118, C124, C131, C134, C135, C137, C139 +25
2247pFCapacitors_SMD:C_0402C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36 +6
1610kResistors_SMD:R_0402R18, R29, R30, R31, R32, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R83
161uFCapacitors_SMD:C_0402C6, C8, C10, C16, C18, C44, C45, C52, C53, C59, C60, C61, C67, C75, C80, C97
13470Resistors_SMD:R_0402R38, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R61
12ESD_PROTECTORCapacitors_SMD:C_0402U12, U13, U14, U15, U16, U17, U18, U19, U20, U21, U22, U23
12FILTERCapacitors_SMD:C_0402FB2, FB3, FB4, FB5, FB6, FB7, FB8, FB9, FB10, FB11, FB12, FB13
10100kResistors_SMD:R_0402R8, R11, R28, R36, R37, R50, R63, R64, R80, R85
1010uFCapacitors_SMD:C_0603C11, C43, C49, C50, C86, C92, C93, C111, C128, C501
10RResistors_SMD:R_0402R10, R65, R66, R67, R68, R75, R76, R81, R82, R3333
3100pFCapacitors_SMD:C_0402C19, C74, C85
34.7uH PFL2015-472MECCapacitors_SMD:C_0805L1, L2, L3
3PMF170XPTO_SOT_Packages_SMD:SC-70Q1, Q4, Q5
3TLV61220Housings_SOT-23_SOT-143_TSOT-6:SOT-23-6U24, U25, U26
2 C_SmallCapacitors_SMD:C_0402C3, C4
21kResistors_SMD:R_0402R1, R2
222uFCapacitors_SMD:C_0603C7, C51
22TAPResistors_SMD:R_0402CN1, CN2
233pFCapacitors_SMD:C_0402C9, C14
24.7uHCapacitors_SMD:C_0805L6, L7
251R EXB2HV510JVFootprints:EXB2HVRP1, RP3
26pFCapacitors_SMD:C_0402C1, C2
2DB2S20500LDiodes_SMD:SOD-323D1, D3
2TS5A3159Housings_SOT-23_SOT-143_TSOT-6:SOT-23-6U10, U11
2TXB0106Footprints:RGY16U1, U2
10.1 1%Capacitors_SMD:C_0805Rsense1
110 MHzFootprints:TSX3225Y2
1100Resistors_SMD:R_0402R78
1100k EXB2HV104JVFootprints:EXB2HVRP2
1100nCapacitors_SMD:C_0402C132
110nFCapacitors_SMD:C_0402C15
110uF 10VCapacitors_SMD:C_0603C115
11206L075THYRCapacitors_SMD:C_1206F1
112k 1%Capacitors_SMD:C_0402R35
11MResistors_SMD:R_0402R33
122uFCapacitors_SMD:C_0805C1234
124 MHzFootprints:TSX3225Y1
12450AT42A100Footprints:2450AT42A100ANT1
1256kx8TO_SOT_Packages_SMD:SOT-23-5IC1
132768Footprints:FC135X1
1392kResistors_SMD:R_0402R34
13TAPFootprints:SOLDERJUMPER3CN3
14.7uF LOW ESRCapacitors_SMD:C_0603C5
147kResistors_SMD:R_0402R62
147uFCapacitors_SMD:C_1206C125
1ADS1298Housings_QFP:TQFP-64_10x10mm_Pitch0.5mmU6
1BAT-Footprints:S7121-42RP4
1CONN_01X07Footprints:MOBO9155P1
1HDMIFootprints:2013978CONN1
1LIS2DH12Footprints:LGA12U29
1MPZ1608D101B (100Ohm @ 100MHz, 1A, 0603)Capacitors_SMD:C_0603FB1
1OPA379TO_SOT_Packages_SMD:SC-70-5U9
1PROGFootprints:HEADER127_4P2
1SCREWFootprints:M3_SCREWSCREW1
1STM32F4x1_64Housings_QFP:TQFP-64_10x10mm_Pitch0.5mmU4
1TiWi-uB2Footprints:TIWIUB2U3
1USB2641Footprints:QFN-48-1EP_7x7mm_Pitch0.5mmU8
1USBULC6-2M6Footprints:USBULC62M6U7
1USB_Power_ModuleFootprints:USB_POWER_MODULEM1
1uSDFootprints:MEM2051U5

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Questions

How big is the Holter PCB?

It measures 30 × 48 mm and has 6 copper layers, 1.6 mm thick.

What parts does the Holter use?

231 parts, built around the OPA379M/TR, TLV61220DBV, TS5A3159DBV and TXB0106PW. 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 Holter KiCad files?

From the peterisza/mobilecg repository on GitHub, at the commit this page was made from: the board is Hardware/holter.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Holter design in my own project?

Its repository states no licence, so its author keeps all rights: ask peterisza before reusing the design.