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I bought it some 12-35 volt DC @ 8Amp motor controllers for another cooled camera experiment earlier, about 4 of them. They were only $5.00 each. A Nichrome DIY heater and one of these would allow some control. I also brought in a temp sensor unit (~$14 ) and 6 sensors. easy enough to keep an eye on it depending on the night. Total cost about $25 for the lot. Would work in the field or Ob on the 12 volt line.
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