# How to measure the coil voltage in this circuit? [closed]

I want to measure the coil voltage (coil+ to coil-) of the following circuit with my microcontroller, but I don't know how. Do you have some hints or suggestions for me?

Thanks!

## closed as unclear what you're asking by Marcus Müller, laptop2d, Elliot Alderson, Edgar Brown, Dwayne ReidFeb 1 at 5:39

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• So you have a circuit, you already know at which points you want to measure. What is it that you then still need help with? – Marcus Müller Jan 28 at 14:30
• I don't want to measure the coil- and coil+ voltage relative to ground. Is there a way to measure the potential difference across the coil directly? I don't know but maybe by using a differential ADC or something like that? – Michael H Jan 28 at 14:40
• I don't understand the question, you have a less than 0.5us/sample ADC in your ucontroller to do that ? You need only peak to peak value? – Dorian Jan 28 at 14:54
• The ADC requires at least 1us/sample. Yes peak to peak value would work. – Michael H Jan 28 at 15:02
• Since the driving waveforms are symmetrical, so are $V_{coil+}, V_{coil-}$. A single-ended ADC could monitor one or the other, provided that its input impedance is high compared with that 48 ohm source Z. Just double changes of the single-ended result. A very fast ADC would be required to sample that 1 MHz waveform. – glen_geek Jan 28 at 15:59