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Originally Posted by Fahim
Also a good soldering iron seems itself to be more than 50$.
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Soldering is a skill, the good iron/ bad iron thing is a myth. I have a $15 cheapo from Jaycar that I carry in the van for work and it solders just as well as the $200 temp controlled model. The main requirement is a suitably sized tip, enough heat and some decent resin cored solder. Stay away from the new high temperature non lead solders. That's about it so
here's a cct diagram (use the optocoupled version), get cracking...
