Difference between revisions of "Ecgrok"
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Uwe Hermann (talk | contribs) (Created page with "The '''ecgrok-tiny''' is a very small, Open Hardware and open-source, experimental, DIY, USB-based 2-channel ECG. The schematics and layouts are done from scratch in [http://...") |
Uwe Hermann (talk | contribs) |
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| bgcolor="#6699ff" | '''Size''' | | bgcolor="#6699ff" | '''Size''' | ||
| | | 20 mm x 10 mm (WIP, might change) | ||
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! align="left" | Digikey | ! align="left" | Digikey | ||
! align="left" | Mouser | ! align="left" | Mouser | ||
! align="left" | Aliexpress | |||
! align="left" | Comments | ! align="left" | Comments | ||
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| colspan=" | | colspan="10" bgcolor="#6699cc" | Required parts | ||
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|| 1 || [http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm32f0-series/stm32f0x2/stm32f042k6.html ST STM32F042K6U6] || UFQFPN32 || 5 mm x 5 mm || — || IC1 || [https://www.digikey.de/product-detail/de/stmicroelectronics/STM32F042K6U6/497-17346-ND/5268195 2.29€] || [https://www.mouser.de/ProductDetail/STMicroelectronics/STM32F042K6U6?qs=sGAEpiMZZMuI9neUTtPr76J1Cds9wgwgQyEqVZ687d16j7CnROJlHg%3d%3d 2.21€] || | || 1 || [http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm32f0-series/stm32f0x2/stm32f042k6.html ST STM32F042K6U6] || UFQFPN32 || 5 mm x 5 mm || — || IC1 || [https://www.digikey.de/product-detail/de/stmicroelectronics/STM32F042K6U6/497-17346-ND/5268195 2.29€] || [https://www.mouser.de/ProductDetail/STMicroelectronics/STM32F042K6U6?qs=sGAEpiMZZMuI9neUTtPr76J1Cds9wgwgQyEqVZ687d16j7CnROJlHg%3d%3d 2.21€] || — || Microcontroller | ||
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|| 1 || [http://www.ti.com/product/ADS1292 TI ADS1292IRSMT] || 32-VQFN || 4 mm x 4 mm || — || IC2 || [https://www.digikey.de/product-detail/de/texas-instruments/ADS1292IRSMT/296-35021-1-ND/3687127 9.06€] || [https://www.mouser.de/ProductDetail/Texas-Instruments/ADS1292IRSMT?qs=sGAEpiMZZMvRHvrHmQ%252bDIeWaWqCRxv5lirhKuEuOlE8%3d 9.58€] || | || 1 || [http://www.ti.com/product/ADS1292 TI ADS1292IRSMT] || 32-VQFN || 4 mm x 4 mm || — || IC2 || [https://www.digikey.de/product-detail/de/texas-instruments/ADS1292IRSMT/296-35021-1-ND/3687127 9.06€] || [https://www.mouser.de/ProductDetail/Texas-Instruments/ADS1292IRSMT?qs=sGAEpiMZZMvRHvrHmQ%252bDIeWaWqCRxv5lirhKuEuOlE8%3d 9.58€] || — || ADC | ||
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|| 1 || [http://www.switchcraft.com/Product.aspx?ID=506 Switchcraft 35RASMT2BHNTRX] || custom || & | || 1 || [http://www.switchcraft.com/Product.aspx?ID=506 Switchcraft 35RASMT2BHNTRX] || custom || 17 mm x 6 mm || — || CONN1 || [https://www.digikey.de/product-detail/de/switchcraft-inc/35RASMT2BHNTRX/SC1489-1-ND/2754494 0.78€] || [https://www.mouser.de/ProductDetail/Switchcraft/35RASMT2BHNTRX?qs=%2fha2pyFadugBYbEyIApCbsLN6HSegI9LkYs0hFESYdE9%252b%2fmOK%2fulEw%3d%3d 0.72€] || — || 3.5mm stereo audio jack | ||
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|| 1 || ECG lead wires || custom || — || — || — || — || — || [https://www.aliexpress.com/item/Electrode-lead-wire-ECG-lead-wire-3-lead-wire-3-5-headphone-plug-module-winder/32846948726.html | || 1 || Amphenol FCI 10118192-0001LF || custom || 9.8 mm x 5.6 mm || — || U1 || [https://www.digikey.de/product-detail/en/amphenol-fci/10118192-0001LF/609-4613-1-ND/2785378 0.36€] || [http://www.mouser.de/ProductDetail/FCI-Amphenol/10118192-0001LF/?qs=%2fha2pyFadujgPm4iVaIQmAH7IEAODLQazmlVAs%2fyYaruZkWE0oGmeA%3d%3d 0.36€] || — || USB Micro-B SMD connector | ||
|- | |||
|| 1 || ECG lead wires || custom || — || — || — || — || — || [https://www.aliexpress.com/item/Electrode-lead-wire-ECG-lead-wire-3-lead-wire-3-5-headphone-plug-module-winder/32846948726.html 3.28€] || ECG electrode lead wires, 3.5mm headphone plug | |||
|- | |||
| colspan="10" bgcolor="#6699cc" | Optional (but highly recommended!) parts | |||
|- | |||
|| 1 || Deek-Robot 1E0185 || custom || — || — || — || — || — || [https://www.aliexpress.com/item/New-USB-Isolator-1500v-Isolator-ADUM4160-USB-To-USB-ADUM4160-ADUM3160-Module/32719549159.html 8.94€] || USB isolator | |||
|} | |} | ||
Revision as of 21:44, 7 June 2018
The ecgrok-tiny is a very small, Open Hardware and open-source, experimental, DIY, USB-based 2-channel ECG.
The schematics and layouts are done from scratch in KiCad, and are released under the CC-BY-SA 4.0 license.
The microcontroller firmware is licensed under the GNU LGPLv3+ and uses libopencm3 (GNU LGPLv3+ as well).
Device
Note: Most of this is work in progress and might change at any time!
| Item | ecgrok-tiny |
|---|---|
| Goals |
|
| Author | Uwe Hermann |
| Status | in progress |
| Hardware license | CC-BY-SA 4.0 |
| Size | 20 mm x 10 mm (WIP, might change) |
| Layout specs |
|
| ECG channels | 2 |
| Microcontroller | ST STM32F042K6 |
| ADC | TI ADS1292 |
| Input protection | None whatsoever |
| Galvanic isolation | None, using a USB isolator is highly recommended for safety reasons! |
| Crystal | None(?) |
| USB connector | USB Micro-B SMD |
| ECG lead wire connector | 3.5mm stereo audio jack |
| Passives | Only 0402 |
| LED | 1x 0402 LED |
Bill of materials
Note: All prices are for single quantities, most parts get a lot cheaper if you buy higher quantities.
| Qty | Device | Footprint | Size | Value | Refdes | Digikey | Mouser | Aliexpress | Comments |
|---|---|---|---|---|---|---|---|---|---|
| Required parts | |||||||||
| 1 | ST STM32F042K6U6 | UFQFPN32 | 5 mm x 5 mm | — | IC1 | 2.29€ | 2.21€ | — | Microcontroller |
| 1 | TI ADS1292IRSMT | 32-VQFN | 4 mm x 4 mm | — | IC2 | 9.06€ | 9.58€ | — | ADC |
| 1 | Switchcraft 35RASMT2BHNTRX | custom | 17 mm x 6 mm | — | CONN1 | 0.78€ | 0.72€ | — | 3.5mm stereo audio jack |
| 1 | Amphenol FCI 10118192-0001LF | custom | 9.8 mm x 5.6 mm | — | U1 | 0.36€ | 0.36€ | — | USB Micro-B SMD connector |
| 1 | ECG lead wires | custom | — | — | — | — | — | 3.28€ | ECG electrode lead wires, 3.5mm headphone plug |
| Optional (but highly recommended!) parts | |||||||||
| 1 | Deek-Robot 1E0185 | custom | — | — | — | — | — | 8.94€ | USB isolator |