[DIYbio] Cheaper OpenPCR

OpenPCR is a cool thing. The only thing is, it's still quiet expensive
for a kit. Looking at the BOM Josh posted:
https://docs.google.com/spreadsheet/ccc?key=0AiaWH3PL_9CndG1GbmtSZ1I3aGdkQkE4YVhwZ3o5c1E#gid=0

I see that there are lots of parts. Can we build a simpler version,
just like we have simpler Arduinos available? I assume the most
expensive parts are the heat-block, PSU, microcontroller.

Any ideas for simpler lid unit, cheaper heat-block, PSU, and MCU?

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