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- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller10 days ago
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller11 days ago
Standard first order RC LPF equation to get a cutoff frequency of ~2 Hz.
View Instructable »If you're wondering how I picked 2 Hz. See attached images. I felt it gave the best quality signal out of the other frequencies I tried and was a good match biomechanically to most of the muscle groups commonly targeted.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller12 days ago
Not sure I understand the question but you should follow the pictures as shown.
View Instructable »The 80.8kOhm resistors and the 1.0 uF capacitor form an envelope detector with a cutoff frequency of 2 Hz. An envelope detector is a low pass filter applied to a fullwave rectified signal.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller14 days agoView Instructable »
First order HPF. http://sim.okawa-denshi.jp/en/CRhikeisan.htm is a good site for quick reference w.r.t. filters. The cut off frequency is 106 Hz in this circuit. However, this cuts off a good deal of the EMG power spectrum so I would recommend using 10Hz or 20Hz instead. Keep in mind this this circuit is almost 10 years old and was created when I was just beginning my journey down the road of EMG circuitry.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller16 days agoView Instructable »
Technically should be -110.The gain is found using the generic inverting amplifier gain equation G = -R2/R1R2 = 100kOhm internal resistor + 1 MOhm external resistor = 1100 kOhmsR1 = 10 kOhm internal resistorG = -1100 kOhm / 10 kOhm = -110
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller18 days ago
The trimmer allows the gain to be adjusted. Using a normal resistor will make the gain fixed.
View Instructable »Frequency is usually between 10 and 500 Hz. Amplitude is usually between 2 and 10 mV.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller4 months agoView Instructable »
This is a single-channel EMG circuit same as the MyoWare.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller6 months ago
Depends on what you mean by "work". You'll likely still get measurements but the accuracy will be degraded if you use 5% resistors. Those electrodes should work; you'll want to avoid TENS electrodes though.
View Instructable »Read through some of the other comments below. This question has been answered already.
- Advancer Technologies commented on Advancer Technologies's instructable DIY Muscle Sensor / EMG Circuit for a Microcontroller7 months agoView Instructable »
The software is called Processing (Processing.org). You can find the code files on our GitHub repo.
- Advancer Technologies commented on Advancer Technologies's instructable Bionic Iron Man Glove7 months agoView Instructable »
Yeah that should work if you didn't damage the board when you burnt out the other pin.
I'm not sure I understand your question about dividing the TL072 but both the INA106 and TL072 have min operating voltages of +-5V. I use +-9V in these instructions for simplicity because it is easily accomplished with two 9V batteries.