A short video demonstrating the operation of my home-made electronic thermal fan controller that I plan to install in my coldframe in which I have my medical marijuana grow flowering. It's Jan 21 in the Hi-Desert, so the nights are still getting down into the mid to low 30's, but the days are pretty bright so the inside of the coldframe gets pretty warm in the daytime. This controller and fan are the first steps toward relieving any over-temp conditions. I plan to post the continuing progress of my outside winter growing and flowering projects.
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