# Biometrics **URL:** https://community.sparkfun.com/c/sensors/biometrics/20.md?page=1 [Latest](https://community.sparkfun.com/latest.md) · [Categories](https://community.sparkfun.com/categories.md) · [Tags](https://community.sparkfun.com/tags.md) **Page:** 2 --- ## [MyoWare Muscle Sensor producing data with varying amplitudes](https://community.sparkfun.com/t/myoware-muscle-sensor-producing-data-with-varying-amplitudes/63728)
**Author:** [@ashokramu](https://community.sparkfun.com/u/ashokramu)\ **Replies:** 3\ **Last updated:** [March 4, 2025, 7:31pm UTC](https://community.sparkfun.com/t/myoware-muscle-sensor-producing-data-with-varying-amplitudes/63728 "2025-03-04T19:31:08Z")
Hi We are using Myoware Muscle sensor and are gettign consistent data on sensors on the left and right biceps or triceps. However the amplitude or the measure of activity on the right arm sensor is consistently much lowe… --- ## [Is there a sensor which is capable enough to detect a large portion of our body's muscle contractions (must detect back, glutes, quadriceps, hamstrings, (calves)).](https://community.sparkfun.com/t/is-there-a-sensor-which-is-capable-enough-to-detect-a-large-portion-of-our-bodys-muscle-contractions-must-detect-back-glutes-quadriceps-hamstrings-calves/63636)
**Author:** [@natis](https://community.sparkfun.com/u/natis)\ **Replies:** 1\ **Last updated:** [February 27, 2025, 12:04am UTC](https://community.sparkfun.com/t/is-there-a-sensor-which-is-capable-enough-to-detect-a-large-portion-of-our-bodys-muscle-contractions-must-detect-back-glutes-quadriceps-hamstrings-calves/63636 "2025-02-27T00:04:00Z")
I want to build project which can detect if a certain muscle is contracted based on the contractions of the back muscles (it shouldn’t be hard to detect muscle activity on our legs or glutes if the sensor is placed on th… --- ## [MyoWare 2.0 Muscle Sensor Development Kit. The sensor is not working. I need to replace it](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-development-kit-the-sensor-is-not-working-i-need-to-replace-it/63195)
**Author:** [@Tommaso\_DI\_LIBERO](https://community.sparkfun.com/u/Tommaso_DI_LIBERO)\ **Replies:** 5\ **Last updated:** [February 17, 2025, 2:13pm UTC](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-development-kit-the-sensor-is-not-working-i-need-to-replace-it/63195 "2025-02-17T14:13:56Z")
I started testing the MyoWare 2.0 muscle sensor development kit about two weeks ago. I bought two of them and so far I had only tried one but no problems, last week I opened the second kit as well but the signal does not… --- ## [How to Activate a Vibration Motor with MyoWare 2](https://community.sparkfun.com/t/how-to-activate-a-vibration-motor-with-myoware-2/63249)
**Author:** [@michuu](https://community.sparkfun.com/u/michuu)\ **Replies:** 1\ **Last updated:** [February 7, 2025, 1:41pm UTC](https://community.sparkfun.com/t/how-to-activate-a-vibration-motor-with-myoware-2/63249 "2025-02-07T13:41:57Z")
Hi everyone, I would like to test the MyoWare 2 sensor on myself. How can I create a device that activates a vibration motor when muscle activity is detected? Best regards, Michuu --- ## [MyoWare Muscle Sensor 2.0 ENV LED not working](https://community.sparkfun.com/t/myoware-muscle-sensor-2-0-env-led-not-working/62174)
**Author:** [@johnson0471](https://community.sparkfun.com/u/johnson0471)\ **Replies:** 2\ **Last updated:** [December 24, 2024, 12:48am UTC](https://community.sparkfun.com/t/myoware-muscle-sensor-2-0-env-led-not-working/62174 "2024-12-24T00:48:07Z")
Hello, I had a problem when testing the MyoWare muscle sensor 2.0. The ENV LED did not light up when I used my arm to exert force. I also tried wiring the sensor to the Arduino Uno development board, but the ENV valu… --- ## [Help! ENV light will not go out in myoware 2.0 muscle sensor](https://community.sparkfun.com/t/help-env-light-will-not-go-out-in-myoware-2-0-muscle-sensor/61714)
**Author:** [@rockrock](https://community.sparkfun.com/u/rockrock)\ **Replies:** 20\ **Last updated:** [December 12, 2024, 5:28pm UTC](https://community.sparkfun.com/t/help-env-light-will-not-go-out-in-myoware-2-0-muscle-sensor/61714 "2024-12-12T17:28:58Z")
I’m having an awful time with Myoware 2.0 muscle sensor. I have it set up without soldering and its plugged into my (unplugged) computer. I dont have a usb isolator but as far as im aware that’s not required if the lapto… --- ## [Myoware 2.0 sensor not working](https://community.sparkfun.com/t/myoware-2-0-sensor-not-working/47147)
**Author:** [@shamsalo](https://community.sparkfun.com/u/shamsalo)\ **Replies:** 3\ **Last updated:** [December 10, 2024, 5:00am UTC](https://community.sparkfun.com/t/myoware-2-0-sensor-not-working/47147 "2024-12-10T05:00:12Z")
Hello, I recently got the 2.0 myoware sensor and I am unable to read my muscle activity correctly. I have the sensor connected to an arduino that I use with a USB isolator. I have a basic arduino code that reads the anal… --- ## [Could the Myoware 2 be used to measure heart rate?](https://community.sparkfun.com/t/could-the-myoware-2-be-used-to-measure-heart-rate/62210)
**Author:** [@KevinT](https://community.sparkfun.com/u/KevinT)\ **Replies:** 1\ **Last updated:** [December 9, 2024, 6:33pm UTC](https://community.sparkfun.com/t/could-the-myoware-2-be-used-to-measure-heart-rate/62210 "2024-12-09T18:33:49Z")
As the title suggests I’m looking to see if the Myoware could be used as a chest heart rate monitor. I’m looking to build a chest hr monitor for my capstone and was wondering if I could use this. The monitor I’m looking … --- ## [Questions About EMG Research Applications](https://community.sparkfun.com/t/questions-about-emg-research-applications/61872)
**Author:** [@trippm4](https://community.sparkfun.com/u/trippm4)\ **Replies:** 3\ **Last updated:** [November 18, 2024, 8:24pm UTC](https://community.sparkfun.com/t/questions-about-emg-research-applications/61872 "2024-11-18T20:24:16Z")
What is the detection limit for the EMG? (smallest electrical signal that it can detect?) — is it good enough to detect on a rat? What unit is the output value measured in? We have it hooked up as default. Does arrange… --- ## [Myoware sensors defective!](https://community.sparkfun.com/t/myoware-sensors-defective/61202)
**Author:** [@KAAV](https://community.sparkfun.com/u/KAAV)\ **Replies:** 1\ **Last updated:** [November 9, 2024, 5:44pm UTC](https://community.sparkfun.com/t/myoware-sensors-defective/61202 "2024-11-09T17:44:07Z")
I am using the Myoware 2.0 ecosystem that I bought earlier in June and so far I have had no success with my sensors! In my setup I am using the Arduino shield, TRS cable, muscle sensor, link shield, cable shield and refe… --- ## [Is it possible to connect Myoware to custom printed electrodes?](https://community.sparkfun.com/t/is-it-possible-to-connect-myoware-to-custom-printed-electrodes/61492)
**Author:** [@Giuseppe\_Longo](https://community.sparkfun.com/u/Giuseppe_Longo)\ **Replies:** 3\ **Last updated:** [October 30, 2024, 5:12pm UTC](https://community.sparkfun.com/t/is-it-possible-to-connect-myoware-to-custom-printed-electrodes/61492 "2024-10-30T17:12:44Z")
Hi, I want to know if it is possible to connect the Myoware instrumentation to other type of electrodes, different to those that are in the kit. If it is possible, have I to solder the electrode cables to the electrode… --- ## [MyoWare sensor not showing muscle activation](https://community.sparkfun.com/t/myoware-sensor-not-showing-muscle-activation/47633)
**Author:** [@KAAV](https://community.sparkfun.com/u/KAAV)\ **Replies:** 5\ **Last updated:** [October 13, 2024, 7:56pm UTC](https://community.sparkfun.com/t/myoware-sensor-not-showing-muscle-activation/47633 "2024-10-13T19:56:19Z")
I am using my myoware sensor with a link shield, trs cable, snd arduino shield. I tried hooking the sensor up to the flexor digitorum superficialis and wasnt able to see any peaks in the serial monitor when flexing my mu… --- ## [Changing I2C address in order to use two Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664](https://community.sparkfun.com/t/changing-i2c-address-in-order-to-use-two-pulse-oximeter-and-heart-rate-sensor-max30101-max32664/60632)
**Author:** [@jaimepatarroyo](https://community.sparkfun.com/u/jaimepatarroyo)\ **Replies:** 1\ **Last updated:** [September 16, 2024, 11:06pm UTC](https://community.sparkfun.com/t/changing-i2c-address-in-order-to-use-two-pulse-oximeter-and-heart-rate-sensor-max30101-max32664/60632 "2024-09-16T23:06:35Z")
I bought two Pulse Oximeter and Heart Rate Sensors - MAX30101 & MAX32664 and I want to connect them both to one RedBoard Plus. They both work perfectly on their own. I cut the I2C jumper trace in one of them thinking th… --- ## [MAX32664 HR Sensor IBI Measurements](https://community.sparkfun.com/t/max32664-hr-sensor-ibi-measurements/46641)
**Author:** [@igpt](https://community.sparkfun.com/u/igpt)\ **Replies:** 2\ **Last updated:** [September 16, 2024, 2:11pm UTC](https://community.sparkfun.com/t/max32664-hr-sensor-ibi-measurements/46641 "2024-09-16T14:11:50Z")
I am using the SparkFun Pulse Oximeter and Heart Rate Sensor. The SparkFun Bio Sensor Arduino Library has been very helpful in getting started with this sensor. I would like to collect interbeat interval (IBI) data. Is … --- ## [Reusable electrodes for Myoware 2.0](https://community.sparkfun.com/t/reusable-electrodes-for-myoware-2-0/60018)
**Author:** [@Bozza36](https://community.sparkfun.com/u/Bozza36)\ **Replies:** 1\ **Last updated:** [August 20, 2024, 5:24pm UTC](https://community.sparkfun.com/t/reusable-electrodes-for-myoware-2-0/60018 "2024-08-20T17:24:38Z")
Hey everyone, Just wondering if anyone has any ideas for reusable dry electrodes for the Myoware 2.0, without needing gel or sticking to the arm. I have seen the link (Conductive Fabric Electrodes - MYOWARE by Advancer… --- ## [Myoware 2.0 Muscle Sensor and Gesture Control](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-and-gesture-control/59992)
**Author:** [@Bozza36](https://community.sparkfun.com/u/Bozza36)\ **Replies:** 3\ **Last updated:** [August 19, 2024, 3:14pm UTC](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-and-gesture-control/59992 "2024-08-19T15:14:42Z")
Hey everyone, I’m curious if anyone here has experience with developing or knows of a gesture control system using the Myoware 2.0 muscle sensor? By gesture control, I mean being able to recognise and differentiate flex… --- ## [Max30102 with Aruino NANO Every](https://community.sparkfun.com/t/max30102-with-aruino-nano-every/43608)
**Author:** [@Monokel](https://community.sparkfun.com/u/Monokel)\ **Replies:** 5\ **Last updated:** [August 5, 2024, 7:03pm UTC](https://community.sparkfun.com/t/max30102-with-aruino-nano-every/43608 "2024-08-05T19:03:46Z")
Hi, I would like to use a Max30102 with an Arduino nano every becouse of its larger memory. But the library does not work with the board. Is there anything I can do to get this going? --- ## [Oximeter error message](https://community.sparkfun.com/t/oximeter-error-message/39527)
**Author:** [@Leithauser](https://community.sparkfun.com/u/Leithauser)\ **Replies:** 8\ **Last updated:** [August 4, 2024, 5:40pm UTC](https://community.sparkfun.com/t/oximeter-error-message/39527 "2024-08-04T17:40:47Z")
When I run the 30105 code I downloaded from Github for the oximeter, I get the message “Example8\_SPO2:144:125: error: cannot convert ‘uint16\_t\* {aka unsigned int\*}’ to ‘uint32\_t\* {aka long unsigned int\*}’ for argument ‘1… --- ## [How to actually get the mV activity of a muscle, not just a voltage or analog reading from a sensor?](https://community.sparkfun.com/t/how-to-actually-get-the-mv-activity-of-a-muscle-not-just-a-voltage-or-analog-reading-from-a-sensor/47616)
**Author:** [@bruhnugget](https://community.sparkfun.com/u/bruhnugget)\ **Replies:** 2\ **Last updated:** [June 23, 2024, 4:52pm UTC](https://community.sparkfun.com/t/how-to-actually-get-the-mv-activity-of-a-muscle-not-just-a-voltage-or-analog-reading-from-a-sensor/47616 "2024-06-23T16:52:51Z")
I have a question about the MyoWare 2.0 sensor regarding how to use it to get the actual muscle activity from a certain muscle(such as the ones you see in real EMGs that kinesiologists use). The MyoWare sensor shows us … --- ## [Myoware 2.0 seems defective](https://community.sparkfun.com/t/myoware-2-0-seems-defective/47331)
**Author:** [@Agramer](https://community.sparkfun.com/u/Agramer)\ **Replies:** 9\ **Last updated:** [May 22, 2024, 10:53pm UTC](https://community.sparkfun.com/t/myoware-2-0-seems-defective/47331 "2024-05-22T22:53:56Z")
I recently purchased two Myomatrix 2.0 sensors. Both of them seem to be defective!!! I am powering them with the Myoware power shield, placing the electrodes over the midline of the muscle belly and reading the ENV sign… --- ## [Rerence cable extension](https://community.sparkfun.com/t/rerence-cable-extension/47410)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 2\ **Last updated:** [May 14, 2024, 3:41am UTC](https://community.sparkfun.com/t/rerence-cable-extension/47410 "2024-05-14T03:41:19Z")
GND (GND electrode cannot be attached to the bone) cannot be removed because the reference cable is short. Do you have a long reference cable? --- ## [How to apply electrodes and measure myoelectric potential](https://community.sparkfun.com/t/how-to-apply-electrodes-and-measure-myoelectric-potential/47411)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 2\ **Last updated:** [May 14, 2024, 3:31am UTC](https://community.sparkfun.com/t/how-to-apply-electrodes-and-measure-myoelectric-potential/47411 "2024-05-14T03:31:45Z")
I attached an electrode to the extensor digitorum communis muscle and performed grasping and dorsiflexion, but the green lamp did not light up and there was no change in myoelectric potential. Therefore, we performed the… --- ## [Using the Reference Cable with Myoware 2.0](https://community.sparkfun.com/t/using-the-reference-cable-with-myoware-2-0/47401)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 1\ **Last updated:** [May 11, 2024, 2:54pm UTC](https://community.sparkfun.com/t/using-the-reference-cable-with-myoware-2-0/47401 "2024-05-11T14:54:29Z")
In order to use the Myoware 2.0 reference cable, I need to disable the socket by cutting the jumper trace on the top side of the sensor, what is the best technique (e.g. cutter or flathead screwdriver) to use? --- ## [AD8232 Unrealistic Values](https://community.sparkfun.com/t/ad8232-unrealistic-values/47370)
**Author:** [@rabelly](https://community.sparkfun.com/u/rabelly)\ **Replies:** 3\ **Last updated:** [May 2, 2024, 7:43pm UTC](https://community.sparkfun.com/t/ad8232-unrealistic-values/47370 "2024-05-02T19:43:31Z")
Hello, I am attempting to use SparkFun’s AD8232 ECG chip to find my heart rate. I am placing electrodes as instructed in the main tutorial, using electrode preparation cream, cleaning skin, etc. The processing GUI provi… --- ## [USB ISOLATOR](https://community.sparkfun.com/t/usb-isolator/47302)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 2\ **Last updated:** [April 17, 2024, 10:59pm UTC](https://community.sparkfun.com/t/usb-isolator/47302 "2024-04-17T22:59:21Z")
I plan to use a USB ISOLATOR. What USB ISOLATOR do you recommend? --- ## [Regarding noise reduction](https://community.sparkfun.com/t/regarding-noise-reduction/47294)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 1\ **Last updated:** [April 16, 2024, 10:19pm UTC](https://community.sparkfun.com/t/regarding-noise-reduction/47294 "2024-04-16T22:19:24Z")
I am using Wyoware 2.0. The parts used are as follows. MyoWare 2.0 Myopotential Sensor 3.5mm plug TRS audio cable - 1m MyoWare 2.0 Link Shield MyoWare 2.0 Arduino Shield During use, noise will be generated… --- ## [MyoWare 2.0 Reference Cable Handling](https://community.sparkfun.com/t/myoware-2-0-reference-cable-handling/47295)
**Author:** [@kkk](https://community.sparkfun.com/u/kkk)\ **Replies:** 1\ **Last updated:** [April 16, 2024, 10:13pm UTC](https://community.sparkfun.com/t/myoware-2-0-reference-cable-handling/47295 "2024-04-16T22:13:32Z")
When measuring myoelectric potential with Wyoware 2.0, I use the MyoWare 2.0 reference cable. Is there anything I need to do when using the MyoWare 2.0 reference cable? --- ## [MYOWARE 2.0 MUSCLE SENSOR NOT FUNCTIONING NORMALLY](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-not-functioning-normally/46697)
**Author:** [@Thom\_Thom](https://community.sparkfun.com/u/Thom_Thom)\ **Replies:** 2\ **Last updated:** [February 25, 2024, 10:21pm UTC](https://community.sparkfun.com/t/myoware-2-0-muscle-sensor-not-functioning-normally/46697 "2024-02-25T22:21:26Z")
TLDR: Myoware 2.0 sensor not working when setup is correct and placement is correct. I am currently trying a project where I use a Myoware 2.0 EMG sensor to read muscle output on my bicep. However, the sensor does not f… --- ## [Capacitive Fingerprint Scanner - UART (AD-013)](https://community.sparkfun.com/t/capacitive-fingerprint-scanner-uart-ad-013/47018)
**Author:** [@sgabran](https://community.sparkfun.com/u/sgabran)\ **Replies:** 1\ **Last updated:** [February 23, 2024, 8:16pm UTC](https://community.sparkfun.com/t/capacitive-fingerprint-scanner-uart-ad-013/47018 "2024-02-23T20:16:10Z")
Hi Can we use the Capacitive Fingerprint Scanner - UART (AD-013) to detect swipe input or gestures ? For example, detect if a user swipe their finger from left to right ? Thanks --- ## [Max30101 Sensor I2C Modification?](https://community.sparkfun.com/t/max30101-sensor-i2c-modification/46470)
**Author:** [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Replies:** 1\ **Last updated:** [January 16, 2024, 6:04pm UTC](https://community.sparkfun.com/t/max30101-sensor-i2c-modification/46470 "2024-01-16T18:04:01Z")
You could use a mux like https://www.sparkfun.com/products/16784 which can create virtual i2c addresses :slight\_smile: https://learn.sparkfun.com/tutorials/qw … okup-guide [Previous page](https://community.sparkfun.com/c/sensors/biometrics/20.md) [Next page](https://community.sparkfun.com/c/sensors/biometrics/20.md?page=2)