I'm making a robotic bartender that I need 5, 6, and 12 volt dc for. I could just run a surge protector into it and have 3 different power supplies, but I'm using this project as a way to learn a few things. I have an 18.5 vdc 3.5 amp power supply that I have that I'd like to divide up, in some way, to different components. I did some research and it seems the best way to do this is with Buck converters. I found some cheap, adjustable ones with good reviews online: (http://www.amazon.com/dp/B009HPB1OI/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=3LKG06RAAIZO1&coliid=I3LB04M0JQAR6I&psc=1#productDetails).
I wanted to know if this is a good idea or if there's a better one, and also how to exactly to hook this up if it is a good idea. Do I simply hook 3 up in parallel? Is there more that has to be done, a voltage divider prior to the buck converters perhaps? Will the amperage be supplied where it needs to be or do I need to do some work to make sure it goes where it needs to?
Power Requirements: -1.5 amps at 12 volts -300mA at 6 votls -5V for arduino Thanks in advance