[PD Protocol | High-Quality Design] Mini Heating Platform [Copper Column Plate]

Original Solution: [PD Protocol | High-Quality Design] Mini Heating Platform - JLCPCB EDA Open Source Hardware Platform (oshwhub.com)
1. The circuit BOM is consistent with the solutions for O and Q, no need to change the BOM or firmware. 2. The PCB needs to be completely redesigned. 3. Probes don't need to be purchased; instead, buy copper pillars and Teflon tubing. (Cheap and free shipping) Copper Pillars: 4*6*5 (10 pieces) Powder Metallurgy Copper Sleeve Oil-Including Bushing Brass Bushing Bearing Inner Diameter 3M 4M 5M 6M 8M 10M 12M 14M 16-60-tmall.com Tmall
    Teflon Tubing: 3*4 mm Teflon Tubing Milky White PTFE Tubing Hard PTFE Flexible Hoses Corrosion Resistant Acid and Alkali Resistant High Temperature Polytetrafluoroethylene Tubing -tmall.com Tmall
    Countersunk Screws: Iron-plated black Phillips head flathead screws, countersunk bolts, machine-threaded screws, KM electronic small screws M2 M3 M4 M5 M6 - tmall.com (Tmall).   
    Important note: If you can make countersunk holes for the heated aluminum substrate (you'll need to buy a countersunk drill), buy screws of specification [M3*10, 4.5mm head]. Otherwise, buy screws of specification [M3*12]... otherwise they won't be long enough.
4. Assembly method
   is otherwise the same as the original plan, key points...