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Draytology
I did not think to try increasing the voltage. Except for on my drivers which is set to .800v and .900v on X and Y. Right now I am at 12 volts and the max I can go to with my PSU is 19.5. My Ramps board should be able to handle it so I think I will definitely give that a shot.
Most RAMPS boards have 16V electrolytic capacitors, so check yours first. Also, you are likely to overheat the 5V regulator on the Arduino if you increase the voltage above 12V with an LCD power from it too, or above about 15V with no LCD.
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Draytology
Looking at something relatively cheap in the 32 bit range.
I'm biased (see my signature), but I advise against using cheap electronics.