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Alan Yates on Twitter: "Wow, a $315 speaker impedance meter is implemented like this? Series diode rail splitter and astable ~1 kHz square-wave source! Glad I found the service manual before I
Basic diagram of the impedance analyzer and probe measurement circuit.... | Download Scientific Diagram
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Figure 3 from Simple Wide Frequency Range Impedance Meter Based on AD5933 Integrated Circuit | Semantic Scholar
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