Hi, 1. That is fine as long as you do not run above the power level mentioned in the user guide. There is already a heat sink below. 2.Please create another thread for this question so that we can better assist you. 3. No, you can't do it by using the original code because the output voltage is fixed and the power level(listed in the first page of the user guide) will be too high. I will suggest to use the 500 ohms or some resistor close to that value. Regards, Chen
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