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.

Johnny's Reloading Bench: https://www.youtube.com/channel/UCQ7ZytKrmCQnRp9LXXxinJQ

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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