The scenario
Designing a low-cost portable device to measure apple ripeness using electrical impedance spectroscopy with the AD5933 chip.
What is in this drawing
Read the decisions behind it.
01
Choice of AD5933 as integrated impedance analyzer
02
Modeling apple impedance as parallel RC circuit
03
Using external feedback resistor and capacitor to set gain and bandwidth
When building a portable EIS system for fruit quality assessment or other biological impedance measurements with a frequency generator and DFT-based analyzer.
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