Why What When
When to comes close to reality we more often dealing with complex wave forms. Sound wave forms except piano contains hundreds harmonics ins spectrum. Very often easy to convert wave on one equipment into image and have it as source. Because images have a long history we can find wave form almost everything in the Internet.
My goal was to create a pre-amp for ECG.
3 challenges:
- microvolt signals (amplitude 1 mv)
- high impedance of human skin
- high electrical nose
To test the circuit I created simple javascript image to data array converter
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