So this Is the problem, i bought the EMG sensor v3 on AliExpress, when i try for the First time the sensor i 've connect to two batteries tò attivate the sensor, but even if i connect the right terminal eachother (+9, GND, -9) i saw a Spark and the capacitors of the sensor got fire. So please have me some advice to risolve this. Thank you
Welcome to the forum.
Can you give a link to it ? Because I can not find a "V3" version of a muscle or EMG sensor on AliExpress.
All the capacitors are labeled "c1", "c2", etc. Which numbers got hot?
C1 and C3
Those are polarized capacitors and will get very hot when the 9 volts are NOT connected correctly!
Ok thank u.
How do you know?
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