Difference between revisions of "Ecgrok"
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| bgcolor="#6699ff" | '''Crystal''' | | bgcolor="#6699ff" | '''Crystal''' | ||
| None(?) | | None(?) | ||
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| bgcolor="#6699ff" | '''USB''' | |||
| USB 2.0 Full-Speed (12Mbit/s) | |||
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|| 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 | || 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 | ||
|- | |||
|| 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 | |||
|- | |||
| colspan="10" bgcolor="#6699cc" | Optional (but highly recommended!) parts | |||
|- | |- | ||
|| 1 || | || 1 || MT Technology Noname || 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, 90° angle | ||
|- | |- | ||
|| 1 || | || 1 || PMSOEHT DF-00147 || custom || — || — || — || — || — || [https://www.aliexpress.com/item/FREE-SHIPPING-ECG-cable-DC3-5-head-a-special-headphone-plug-straight-3-lead-wire-button/32719133312.html 16.96€] || ECG electrode lead wires, 3.5mm headphone plug, straight (alternative) | ||
|- | |- | ||
| | || 1 || CONTECMED ECG patches || custom || — || — || — || — || — || [https://www.aliexpress.com/item/ECG-accessory-Sticky-patches-pieces-20pcs-per-pack-for-ECG80A-90A-100G-300G-600G-1200G-1201/32805800469.html 8.44€] || 20 ECG electrode patches | ||
|- | |- | ||
Latest revision as of 23:18, 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 | USB 2.0 Full-Speed (12Mbit/s) |
| 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 |
| Optional (but highly recommended!) parts | |||||||||
| 1 | MT Technology Noname | custom | — | — | — | — | — | 3.28€ | ECG electrode lead wires, 3.5mm headphone plug, 90° angle |
| 1 | PMSOEHT DF-00147 | custom | — | — | — | — | — | 16.96€ | ECG electrode lead wires, 3.5mm headphone plug, straight (alternative) |
| 1 | CONTECMED ECG patches | custom | — | — | — | — | — | 8.44€ | 20 ECG electrode patches |
| 1 | Deek-Robot 1E0185 | custom | — | — | — | — | — | 8.94€ | USB isolator |