MG Sensor Overheating and Inaccurate Readings

Other Hardware Sensors
1

Hello everyone,

I'm trying to measure EMG signals using an EMG sensor with my Arduino, following the wiring instructions provided by others. However, I'm facing a couple of issues:

  • The sensor is getting extremely hot.
  • The measurements are not accurate.

I initially suspected that the battery polarity might be reversed, so I tried connecting the battery with reversed polarity. Unfortunately, this only made the sensor heat up even more.

Has anyone encountered similar issues or can suggest what might be causing these problems? Any advice on troubleshooting or proper wiring would be greatly appreciated.

Thank you in advance for your help!

KakaoTalk_20250228_104755613
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2

In the case of a sensor heating up, it is very likely that you have destroyed the sensor, and possibly the Arduino as well, by improperly wiring it.

Please post a schematic diagram (hand drawn is preferred) with all parts, pins and connections clearly labeled.

Post links to all the components, and to the instructions you tried to follow.

Forum posting instructions can be found in the "How to get the best out of this forum" post, linked at the head of every forum category.

3

Thank you for your help. The video I referenced is linked below. I followed the Arduino code and wiring exactly as shown in the link.

4

Please post the rest of the requested information. Few Arduino forum members will bother to watch a video.

5

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This is the arduino code and diagram

6

Still waiting for the link to the EMG amplifier, which you will undoubtedly need to replace.

7

I don't know exactly which component is being referred to, but if the diagram is incomplete, I don't think I used an EMG amplifier. I didn't use anything other than the equipment shown in that diagram.
Based on the video, it seems that only the devices shown were used to read the signal. Does that mean an amplifier is absolutely necessary? Thank you for your help!

8

You haven't posted any links to any of the equipment you are using.

The little red module in the drawing is an EMG amplifier, and it has almost certainly been destroyed by miswiring, especially after reversing the battery connections.

I recommend that you study this professional tutorial on EMG sensing at Sparkfun.

9

I understand. I am using the sensor below, and using arduino uno R3. Other equipments are just breadboard and wire.

10

Notice that the user reviews on the product page of that EMG amplifier are very bad, and complain that there is no documentation.

There is not much point in buying undocumented modules with poor reviews, especially if you do not understand what they do.

11

Thank you for your response. Then, is buying another module the only solution?

12

I would certainly not recommend buying that particular EMG amplifier.

13

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