Hello Friends,
I bought a BMI scale because it uses impedance to estimate fat percent and other parameters after running a small current through your body. My hope is to find a point on the circuit board corresponding to the impedance signal, hook this up to the Arduino and collect data in the Serial Monitor. Is this at all realistic? I eventually want to use this to measure impedance (Or a signal proportional to impedance) of another biological system. Any suggestions?
I have realized that impedance is what is used to estimate the body fat percentage and other related characteristics of the body. I am a University researcher and am interested in this impedance measure. Specifically I am interested in using the preexisting circuit from the scale and measuring impedance of a sample. Any thoughts? I naively thought I could just open it up and put a lead somewhere to hook up to a DAQ (by DAQ i mean my arduino..) to serial print the impedance measures. I'm guessing the bit resolution of the Arduino isn't enough to be of use and I may need to use OP AMPS.. im a beginner, any help, advice, suggestions, or other ideas are welcome!
In the picture you can see the inside of the scale. In order for the screen to work the chip (yellow) must be placed face down so that its leads make contact with a ribbon associated with the screen. If you look at the chip you can see where the leads go which apply the small current through your body (you can see the wire going into the 3/8 inch hole on the right and left) There is also a small component on the chip with the number 7533-1 (I think this is a voltage regulator) and another small component with three rows of text on it and 8 leads, ATHYC542 24C02N SU27D (I think this is the distributor which allows memory of the scale users weight and other information, allows rewritten)
Thanks,
Noremak
I bought a BMI scale because it uses impedance to estimate fat percent and other parameters after running a small current through your body. My hope is to find a point on the circuit board corresponding to the impedance signal, hook this up to the Arduino and collect data in the Serial Monitor. Is this at all realistic? I eventually want to use this to measure impedance (Or a signal proportional to impedance) of another biological system. Any suggestions?
I have realized that impedance is what is used to estimate the body fat percentage and other related characteristics of the body. I am a University researcher and am interested in this impedance measure. Specifically I am interested in using the preexisting circuit from the scale and measuring impedance of a sample. Any thoughts? I naively thought I could just open it up and put a lead somewhere to hook up to a DAQ (by DAQ i mean my arduino..) to serial print the impedance measures. I'm guessing the bit resolution of the Arduino isn't enough to be of use and I may need to use OP AMPS.. im a beginner, any help, advice, suggestions, or other ideas are welcome!
In the picture you can see the inside of the scale. In order for the screen to work the chip (yellow) must be placed face down so that its leads make contact with a ribbon associated with the screen. If you look at the chip you can see where the leads go which apply the small current through your body (you can see the wire going into the 3/8 inch hole on the right and left) There is also a small component on the chip with the number 7533-1 (I think this is a voltage regulator) and another small component with three rows of text on it and 8 leads, ATHYC542 24C02N SU27D (I think this is the distributor which allows memory of the scale users weight and other information, allows rewritten)
Thanks,
Noremak
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