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9A DC-DC Step Down Voltage Regulator (Buck Converter)
This step down voltage regulator uses high frequency switching to make a very efficient DC-DC converter. It can take an input of 5V to 40V and lower it to between 1.2V and 35V at up to 9A(output). The voltage is set with one potentiometer and the constant current can be set with the other from 200mA to 9A.
note: If using this converter at its limits, you will need to fan cool the converter.