Summary: The basic electrical components used in the project are listed here. For convenience, links to suppliers are provided. There's no obligation to use these sources; Feel free to buy from your preferred suppliers.
The Small Print: Don't worry, the URLs are NOT sneaky affiliate links. I don't profit from your clicks.
Important Notes: Most of the parts have similar looking variants that may not be compatible with the project. Therefore, consult the photos shown below to confirm you are buying the exact item needed.
Fatherly Advice: Many of the electronic components are very low cost, so it is highly recommended to add a spare to your order in case of electrical "accidents."
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ZX7-200 miniGB 200A Mini Electric Stick Welding Machine IGBT DC Inverter
Banggood: https://bit.ly/2Mra7gC
eBay: https://ebay.to/2J5PKno
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Lolin ESP D32 Pro, V2.0.0 16MB Flash (Qty 1)
Mfg Site: https://wiki.wemos.cc/products:d32:d32_pro
AliExpress: https://bit.ly/2qoDPKJ
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Lolin TFT 2.4-inch Color Touch Shield (Qty 1)
Mfg Site: https://wiki.wemos.cc/products:d1_mini_shields:tft_2.4_shield
AliExpress: https://bit.ly/2oXlrYW
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10-Pin Cable for TFT Touch Shield (Qty 1)
AliExpress: https://bit.ly/2MN3hB6
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Microchip Technology MCP45HV51 5K Ohm I2C Digital Potentiometer (Qty 1)
Mfg Site: https://www.microchip.com/wwwproducts/en/MCP45HV51
Suppliers: https://www.findchips.com/search/MCP45HV51-502E
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INA219 Current Sensor Module (Qty 1)
eBay: https://ebay.to/32e5R9T
AliExpress: https://bit.ly/32tD4hM
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TSSOP14 to DIP PCB Adapter (Qty 1)
eBay: https://ebay.to/35AFNrz
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PS2501-1 4-Pin DIP Optocoupler IC (Qty 1)
AliExpress: https://bit.ly/35JOvE7
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PAM8403 3W Audio Amplifier (Qty 1)
eBay: https://ebay.to/33ALaFr
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MP1584EN DC-DC Power Supply Module (Qty 1)
eBay: https://ebay.to/2ohYDm6
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JST XH 2.54mm Wire-Cable with 7-Pin Female Plug, 30cm long (Qty 1)
AliExpress: https://bit.ly/2MjjHSQ
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Ultra Thin profile (<13mm deep) 50mm diameter speaker, (Qty 2)
AliExpress: https://bit.ly/2MJ5UEf
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Bluetooth FOB Button Key Finder (Qty 1)
eBay: https://ebay.to/2MIkNqo
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Misc Components
1/8W 5% resistors: 47K (R1), 1.8K (R2), 4.7K (R4), 2 pcs 10K (R3 and R5), 2 pcs 10 ohm (INA219 Mod)
Ceramic Caps: 0.01uF/50V (C5), 2 pcs 0.1uF/50V (C6 and INA219 Mod)
Electrolytic Caps: 0.47uF/10V (C1), 100uF/16V (C8), 470uF/10V (C7)
Not Installed: C2, C3, C4 (optional). -
Misc Hardware
Self tapping screws needed: 7 pcs M2x6, 2 pcs M2x10, 1 pc M2x12
Perfboard with plated holes, 0.1-inch (2.54mm) hole spacing.