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Month: September 2018

Electrolysis Issues with Soil Moisture Sensor

One problem with testing for moisture in soil or for free water is electrolysis of the electrodes. As material is removed from one electrode and deposited on the other (a byproduct of using a dc current), the resistance changes, and

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Long Distance Serial with RS-422

PC’s used to have RS-232 ports to connect things like mice, modems, printers, etc. Then technology moved on to USB. RS-232 had a maximum distance of 50′, and USB is 9′ (USB 3.0) to 16′ (USB 2.0). If you really

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