Hello everyone,
I designed an EMG circuit on the breadboard. After working on the breadboard, I went to PCB design, but I am facing issues with the PCB.
The breadboard and PCB are working the same as when I give a sine wave input voltage of 1–20 mV. When I test the breadboard for EMG signal measurement, the output comes in the voltage range and also shows hand movement. but when I do the same process on a PCB, it does not give output in voltage; it's gives the output in a few mV. And not detect any hand movement.
If anyone knows what the problem with PCB, please reply to me.

 

No pcb.

No schematic.

Not every knows what EMG means.

Exactly what kind of answer do you expect?

ak

 

hi
https://www.engineersgarage.com/arduino-based-emg-monitor-ad8226/

 

A breadboard has many rows of contacts and wires all over the place. Each row and wire is an antenna for picking up interference and capacitance effects when using the very high gain EMG circuit.

 

Based on no information, I am thinking that the difference is in the common connection for the input to the PCB. But without a circuit schematic it is hard to be more specific. But obviously some connection is missing.