Looks like I’m not finished with my cooling project just yet. I’m going to change the board to handle two independent fans, and get the whole thing on a single board. The problem is that I really need to exhaust the hot air out from the back of the TV unit, so that cool air is dragged in through the front. I think I’ll need at least two 120mm fans to get enough air through.
I’ll use what I’ve learnt so far, and add a few more useful bits and pieces. First thing is to display the temp on startup for 3 seconds. Easy.