Good old Radio Shack! I worked there for a couple years in college (While going to school for electronics.) . I collected all the RS little pages books when I was a kid right next to my Hot Rod little pages. Here's my Radio Shack sign that hangs in my shop.
https://photos.app.goo.gl/fBrq3WwgNzfhzGVu932Fordpuchop came by the shop last week and we played with the PWM fan control we ordered on Amazon for about $11. It's Chineaseum so like Dev said on his page about these (Your mileage will vary). Here's a short clip of us playing with it.
PWM Fan Controller for 12 Volt conversions in Old TrucksI'm sure he'll let you know how well it works. (32Fordpuchop) he's planning on mounting it a small enclosure under the dash somewhere. The one Dev used he got from Mouser and is already in an enclosure but we went the cheap option. Here's a link to Dev's writeup and he has a template for an underdash bracket at the bottom of the page as well.
http://devestechnet.com/Home/Native12VUpgrade#heatersystemIf anyone want's the file to 3D print their own "More truck looking" Knob let me know via PM and I'll shoot it over to you I printed it in Brown/Tan ABS.
Like a dork I say early in the video "PWM Modulator" which I realize is a bit redundant so ignore my mis-speak.
~Mongo
