Ecgrok
Revision as of 20:29, 7 June 2018 by 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://...")
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 | WIP |
| 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 | Comments |
|---|---|---|---|---|---|---|---|---|
| Required parts | ||||||||
| 1 | ST STM32F042K6U6 | UFQFPN32 | 5 mm x 5 mm | — | IC1 | 2.29€ | 2.21€ | |
| 1 | TI ADS1292IRSMT | 32-VQFN | 4 mm x 4 mm | — | IC2 | 9.06€ | 9.58€ | |
| 1 | Switchcraft 35RASMT2BHNTRX | custom | — | — | CONN1 | 0.78€ | 0.72€ | 3.5mm stereo audio jack |
| 1 | ECG lead wires | custom | — | — | — | — | — | Aliexpress, 3.28€ |