Zenerglass

The Zenerglass. A reverse biased diode entropy source capable of 175kbps.

The Zenerglass.

The Zenerglass, side view. A reverse biased diode entropy source capable of 175kbps.

Side view.

The Zenerglass, top view. A reverse biased diode entropy source capable of 175kbps.

Top view.

The Zenerglass is a simple implementation of a reverse biased Zener diode entropy source. The diode creates avalanche noise and feeds the unamplified but buffered signal into the analogue to digital converter within an Arduino Uno. It’s super compact, standing 280mm high and operates on 12V. It generates 175kbps of entropy via it’s Ethernet connection.

It also has pretty lights that indicate when someone accesses the device…

The Zenerglass indicating that it's transferring entropy.

The Zenerglass indicating that it's transferring entropy.

The Zener diode based entropy source at the heart of the Zenerglass.

The Zener diode based entropy source.