The Null Gamma Device (∅γ) is a Raspberry Pi 3B+ camera based successor to our Photonic Instrument. The device exists, works perfectly and it’s on-line output is available here. There is also a biased random walk of the output entropy here. It’s just currently missing a case, hence no final photos yet.
With no particular ego, Null Gamma is the fastest non commercial/non laboratory entropy source we’ve seen anywhere. It can manage ~20 Mbits/s, producing entropy with a min. entropy (quality) of 7.9 bits/byte that’s proven to be IID. And with the following distribution:-
We’d love to hear of any faster amateur device please.