Would a Monero wallet generated with simplewallet on a Raspberry Pi be as secure as one generated on an Intel-based Mac or PC? How can one determine whether one's random number generator is good enough?
Having analog-to-digital (A/D) converter making very small voltage measurements can assure randomness. Most electrical engineers are very familiar with the "thermal noise floor" that in a statistical sense is governed by K*T*B*NF physics equation. K = Boltzman's Constant, T = Temperature in Kelvin, B = Bandwidth in Hertz, NF = Noise Figure of amplifier feeding the A/D converter(s).