3.3V 5V 6V 9V 12V 24V AC DC To DC Buck Step Down Adjustable Volt Converter new
E.g. input 12V max. output 3-9V or input 24V max. output 3-21V. Input: 6.35 V DC or 6.22V AC. Since it is a very fine thread, you have to make a corresponding number of revolutions until the desired tension is reached.