I assembled a PID temperature controller for my Lee 4-20 lead casting pot. I followed the directions and instruction provided by Johnny's Reloading Bench.
JRB's PID videos: Pt 1: Demo and Parts List (https://www.youtube.com/watch?v=AgixJeF0vEU&t=2932s) Pt 2: Building and Wiring the Controller (https://www.youtube.com/watch?v=IGOqMyx5kv4&t=3094s) Pt 3: Initial Programming, Testing, Auto-Tuning (https://www.youtube.com/watch?v=KFVcrtQ_pdQ) Pt 4: Nibbling Tool (https://www.youtube.com/watch?v=ns1Y03Ay27c&t=438s) Pt 5: Lee 4-20 thermocouple options (https://www.youtube.com/watch?v=SqAuBEdugcQ&t=1649s)
The PID controller was a gift from Thorsaxe777: https://www.youtube.com/thorsaxe777
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