Too much power?
If you have not bought the display, I would recomend getting the Wide Voltage model. It can accept voltages from +7V to +15V no problems... if you did buy it all ready, maybe make your own voltage regulator, or buy a +5V external power suppply... The +5V can take a maximum of +5.25Vdc...
Henry J.
President
Matrix Orbital
President
Matrix Orbital