I am sorry if this is too naive question in this site. I am from non-electrical-engineering major but I am trying to build an embedded system which will be in a real-time imaging system box along with camera. It will be possibly running 24 h/day
Currently, I have a PC/104 motherboard ADLGS45PC with Intel CPU on it, and the system will have 2-3 SSD or SATA HD with USB port to camera. Naturally, I will need to have a power supply unit for the system. But deciding the PSU seems like a complex puzzle to me.
Question 1. What would be right power supply for this system? Choices are
PC/104 Power supply unit DC/DC
PC/104 Power supply unit AC/DC
Question 2. What is right way to decide total amount Wattage for the system?
Following is the list of power consumption for each component in the system I got for PSU unit.
Motherboard: 13-20W from motherboard manual
64GB WD sillicondrive A100's power consumption is 5V 0.9W (Active) -> 2W
512 GB Crucial SSD 6Gb/s CT512M4SSD2 ($400): 0.15W (Active) -> 2W
320 GB WD Scorpio Black HD ($62): 1.75W (Active) -> 4W
USB 2.0: 5V x 500mA = 2.5W => 6 x = 15W
Network port: 5W
Totaling above items is about 60W + 20W (for some extension). Is this right way to calculate wattage for PSU?