I had rigged up a 24vdc gearmotor to run a drum/spool with cable and was planning to use it to open/close the drop down sides on the high tunnel. The cable would start mounted to the drop down frame, go up and wrap around the drum 4-5 times, go back down through a pulley at […]
Potentiometer as a Sensor Read More »
Here’s how the two SPDT relays work to reverse polarity/direction of a DC motor. I’ll be using this circuit to open/close high tunnel sides and gable vents based on the temperature inside the tunnel and will also be closing the sides in high winds. If it’s hot and windy, I’ll have them close 80% of
Wiring two relays to reverse the rotation direction of a DC motor Read More »
