Question: Could we just use the PWM feature of an Arduino to generate the 50% duty cycle we need for the Coqui or for a water conductivity meter?

roberts_ecofarm is asking a question about coqui
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by roberts_ecofarm | December 05, 2018 01:21 | #17807

Still working on a low cost conductivity sensor/data logger. Was writing code for my Arduino Uno the other day and got reminded of the PWM feature while looking at information on different pins. This article from NYU reminded me of donblair's post about 555 timers and duty cycles.

Anyone have any experience with this or thoughts on the feasibility?

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3 Comments

  
Comment Author Profile Picture warren commented almost 6 years ago

I think it's possible, yeah! I'm not sure how fast PWM is or how easily you can set the rate?

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Comment Author Profile Picture alejobonifacio commented over 2 years ago

Hi! good question! The frequency of PWM of arduino is about 500hz. Is that enough for conductivity measurement?

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Comment Author Profile Picture alejobonifacio commented over 2 years ago

Reading a little more I found that you could change the frequency of the PWM in arduino. I did not try to do this.


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