I bought an adjustble DROK step down (buck) converter on Amazon:
http://www.amazon.com/gp/product/B00GZG7X9Y?ref_=pe_823600_114105210#Ask
I have bee unable to adjust the voltage. The convertor came with no instructions; the Amazon site reads:
“Short-circuit output terminal, then adjust the current output, you can set the current limit.”
Is this safe?