Optimizing EMG Circuit Design: Tips and Parameters for Improved Performance

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Discussion Overview

The discussion revolves around the design and optimization of an electromyography (EMG) circuit. Participants seek to understand the parameters that should be considered at each stage of the circuit and the appropriate values for these parameters to improve performance. The conversation touches on safety concerns and personal experiences related to EMG detection.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Meta-discussion

Main Points Raised

  • One participant requests specific parameters and their values for each stage of the EMG circuit design, indicating a lack of clarity on what is needed for optimal performance.
  • Another participant suggests that EMG stands for electromyography, but does not elaborate further.
  • Safety warnings are raised regarding the experimentation with EMG circuits, particularly cautioning against using mains power and advocating for battery use instead.
  • Personal anecdotes are shared about past experiences with connecting body parts to audio amplifiers, highlighting the risks associated with DIY projects involving electrical equipment.
  • Questions are posed regarding the source of the circuit schematic, the power supply used, and the background of the original poster in electronics and medical electronics.

Areas of Agreement / Disagreement

Participants express concerns about safety when working with EMG circuits, indicating a shared understanding of the risks involved. However, there is no consensus on the specific parameters or values needed for the circuit design, and multiple viewpoints regarding safety practices and personal experiences are presented.

Contextual Notes

There are unresolved questions regarding the specific circuit design and its parameters, as well as the background knowledge of participants, which may affect the discussion's depth and clarity.

Who May Find This Useful

Individuals interested in electronics, particularly in the context of medical devices, as well as those exploring DIY projects related to electromyography.

gokul karat
HAI EVERYONE

i have designed a circuit for emg detection but its not working perfectly. may i know the parameters that to be considered in each stages and what should be the value of each parameters in each stages. (e.g. gain at IN stage =20).

thank you..
 
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gokul karat said:
HAI EVERYONE

i have designed a circuit for emg detection but its not working perfectly. may i know the parameters that to be considered in each stages and what should be the value of each parameters in each stages. (e.g. gain at IN stage =20).

thank you..
What is emg? Thank you.
 
Possibly Electromyography .

Warning : Definitely not a subject that can be experimented with safely by someone with no medical or technical knowledge .
 
Last edited:
Nidum said:
Warning : Definitely not a subject that can be experimented with safely by someone with no medical or technical knowledge .

For safety never connect yourself to anything mains powered either directly or indirectly. It's much safer to use batteries (totalling less than 36V) to power any home made projects of this sort.
 
CWatters said:
For safety never connect yourself to anything mains powered either directly or indirectly. It's much safer to use batteries (totalling less than 36V) to power any home made projects of this sort.
I seem to remember connecting my arm and also my heart to the audio amplifier of a tape recorder when I was in my teens and I could see the voltage from muscle contractions on the magic eye and hear the noise. I also tried it on my brain with no result (!). But it was a mains amplifier! I just took a knowing chance, as we used to play around with high voltages all the time then.
 
gokul karat said:
i have designed a circuit for emg detection but its not working perfectly. may i know the parameters that to be considered in each stages and what should be the value of each parameters in each stages. (e.g. gain at IN stage =20).
Welcome to the PF. :smile:

Where did you get the circuit schematic? How is it powered? What is your background in electronics? What is your background in medical electronics? What are you planning on doing with this EMG device once you get it working well?
 
tech99 said:
I seem to remember connecting my arm and also my heart to the audio amplifier of a tape recorder when I was in my teens and I could see the voltage from muscle contractions on the magic eye and hear the noise. I also tried it on my brain with no result (!). But it was a mains amplifier! I just took a knowing chance, as we used to play around with high voltages all the time then.

Think I probably did the same. Commercial products like tape recorders and amps should be/are designed so you can safely touch connectors.

The problem with DIY mains powered equipment is that making it safe isn't as simple as buying the power supply part.
 

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