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You can buy tools and parts, or things you were going to buy anyway from Amazon through the affiliate program (links below) and I may receive a commission for the sale. :
TRIAC: (Check model): https://amzn.to/3j5qXQ4
Soldering kit: https://amzn.to/367uGcw
or a multimeter : https://amzn.to/357iwj7
or you can buy anything else through the link. This has no effect on the price for you. The links used are affiliate links. As an Amazon Associate I earn from qualifying purchases.