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May 2018 - Circuit Crush

Month: May 2018

RPM into MPH? Building a Anemometer!

I’m building an anemometer to measure wind speed. I’m building the typical 3 cup style anemometer, and using a hall effect sensor (digital, non-latching) to trigger an arduino (or esp8266). It’s a open collector unit (output pulls low when triggered with a magnet), and therefore uses a 10k ohm pull up resistor, or use pinMode(inPin, …

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