PID Controlled Hotplate
I built this PID controlled hotplate to use for surface mount soldering, curing epoxies, and doing other miscellaneous stuff in my workshop. Having a nice chunk of metal that you can set to an arbitrary temperature (room temp to over 500F) is handy! (Solder melts at about 365F.)

More info is available on my blog at:
mightyohm.com/blog/2009/01/diy-pid-controlled-soldering-h...
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