What's the deal with those clever transistors? We've been covering them all August in our Component of the Month series, and it's time to pull out a classic explanation of the technology from the dusty archives of MAKE H.Q..
Steel conduits' galvanization layer, designed to inhibit corrosion, is highly toxic and will burn off in an environmentally uncool manner when welded, and also makes for a "not so great" weld. The solution? Burn it off with acid.