Electric Signs

Aside from automotive work, I spent 20+ years building custom electric signs, I did quite a bit of work for theme parks like Disney and Universal Studios. They’re pretty picky, especially Disney who have their own electrical and mechanical engineers to spec out how things are to be built and they inspect everything before it […]

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Wiring two relays to reverse the rotation direction of a DC motor

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

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