Heated bed project part 4

Posted January 23 2012, tagged reprap, launchpad, heatedbed,

Well I've played around with temperature values in the MPS430 board.  Managed to blow a mosfet, and burnt my fingers. 

The heated bed MKII arrived after christmas and I've had it heating up.  I found an old Dell PC power supply, and have rigged that to supply the 12V for the bed.

While just checking the forums, I came across these two posts.  They offer more information on heated bed control circuits. 



For reference in the circuit design, here are a few notes I've collected since Christmas.

Also since I keep losing this, basic circuit for Launchpad MPS430


The derived R / T curve with Wolfram Alpha

Linearizing R/T curve

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