***Pictures below***
Materials needed:
1 - 4'x8' sheet of 1/2" plywood (or osb board like I used) $25 at Home Depot
1 - Inkbird 110 volt temperature controller, $16 on Amazon
1 - Arctic F8 80mm computer fans, pack of 5 for $22 on Amazon
1 - Fan power supply connector (to convert 110 volt to...