Close

uECG event log

A project log for uECG - small open source wireless ECG sensor

It's cheap, doesn't use a specialized heart rate AFE and can blink LEDs with your pulse :)

lucy-sohryuLucy Sohryu 08/15/2021 at 13:300 Comments

We've decided to create this log to keep uECG-related events and news in a single place. It will be updated whenever something new happens, so keep an eye out!


March 22, 2023

uECG is back and we have reopened sales! It’s a small batch, so get them while you can! We have made some changes to the board that will hopefully make it (especially the IMU) more reliable and efficient. 

As always, we will try to ship your orders within 3 days, but they can take longer after sales reopen.

Changelog for uECG v.4.52:

- Replaced AD8606 op amp with a pair of TLV271s;
- LDOs (3.3V for digital, 3V for analog side) were mixed in the previous version; strangely this didn’t affect functioning, but now this is fixed;
- Replaced BMI160 with LSM6DS3TR-C;
- Changed C6 capacitor from 2.2uF to 10uF for better low frequency performance;
- Replaced circuit protection (red LED) with diodes for more reliability;
- Changed charge resistor to 8.2K Ohm to fit the battery charging better;
- Replaced MCP71831 charger IC with TP4054; 
- Added thermistor for measuring temperature;
- Changed RGB LED to different part number;
- Added Ultimate Robotics logo on the back of the PCB.

November 26, 2022

We have launched our second device, uMyo! It's a single-channel EMG sensor with both wet and dry electrodes. You can check it out here. Also, we wrote a small post about the blackouts in Ukraine (which you've probably read about in the news) here. Check it out, bet you've never seen anything like this.

June 10, 2022

We have reopened uECG sales today (and a large firmware update)

June 7, 2022

A tribute to our friend, veteran and fellow maker, Denys Antipov

March 17, 2022

War update #2 (volunteering and living from day to day)

Feb 28, 2022

War in Ukraine (that's where we are) update

Feb 14, 2022 We're back from vacation, although we still wait for a new batch of uECGs. It's due in 7-10 days - until then, we have a few devices in stock. Also, Happy Valentine's Day!

Jan 19, 2022 New batch of uECGs in early February - we'll reopen then, as we decided that despite still having a couple uECGs left, we better use the time to upgrade our packaging/shipping process and prepare for the spring. See you soon!

Jan 16, 2022 Extended the break for a few days to take inventory and order new production batch, stay tuned

Dec 28, 2021 We're taking a break until January, 16! Happy holidays to everybody!

Nov 16, 2021 We're back from the break! And we also have extra gel electrodes back in stock, as well as a fresh batch of USB bases from the factory. The bases are slightly more expensive now ($14 instead of $10, as the component prices have gone up). Other than that, everything's back to normal!

Oct 26, 2021 We are on vacation from today to November 14! Time to rest a bit, we've been shipping slower recently. Feel free to sign up for notifications about when we reopen.

October 13, 2021 update Extra packs of gel electrodes temporarily removed from order options, cause we run out of them and the new ones are arriving in a week or so. We'll still put 10 free gel electrodes with each order, we just can't put more of them.

August 24, 2021 update Bug with radio mode (about which we wrote on Sunday) is now fixed and all orders until now are shipped! Thank you for your patience!

August 17, 2021 - uECG returns - with new features! Well, it’s clearly taken longer than a month since we sold out all stock in April - in fact, it’s now late July, but we’re launching uECG sales again! uECG v4.5 has new PCB layout, some new components (and some removed), better antenna, more battery life (24 hours, finally!) and new firmware improvements! We have implemented standard BLE connection (so fitness apps can now recognize uECG as a generic heart rate sensor), better signal packaging for BLE version (previously R peak amplitude in BLE mode wasn't as precise due to the averaging method), and more reliable R peak detector. And we also made another big step - wrote a brand new bootloader, so you can now upload new firmware directly from the Android app!

April 2, 2021 - New uECG stock in a month Well, we have officially almost run out of uECGs. There's only a couple devices left. We're preparing a new batch to send into production in April, and it'll (probably) be ready at the start of May - but who knows, maybe there'll be delays at the factory. We can hope though!

Latest app version here:

uECG monitor app on Google Play.

Feb 3, 2021 - Arduino library

Official Arduino library is online.

Dec 9, 2020 - EMG mode is working!

We play Cyberpunk 2077 theme cover with EMG gesture control using uECGs in this Hackaday log.

Sep 9, 2020 - New app functions

Hackaday log about the app update - Poincare plots, HRV, accelerometer data.

Sep 1, 2020 - Wireless firmware upload is ready!

All units ordered after September 1st have wireless firmware upload capability. Older units require uploading new bootloader via ST-Link once, after that they will support wireless update as well.

A USB base station is required for this process - BLE is not supported yet.






Discussions