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Archive for October 5th, 2015

Avalanche Noise Amp: Hardware

Finally, the as-built hardware for the Avalanche Noise Random Number Display gadget:

Reverse-bias noise amplifier - detail

Reverse-bias noise amplifier – detail

The noise interconnection consists of one little wire:

High Speed Randoms - Schematic - overview

High Speed Randoms – Schematic – overview

The noise generator, amplifier, and bias power supply:

High Speed Randoms - Schematic - avalanche noise amplifier

High Speed Randoms – Schematic – avalanche noise amplifier

The Arduino (Pro Mini, at least) and the logic / LED power supply:

High Speed Randoms - Schematic - Arduino and power

High Speed Randoms – Schematic – Arduino and power

The row drivers:

High Speed Randoms - Schematic - row drivers

High Speed Randoms – Schematic – row drivers

And the red-green-blue LED column drivers:

High Speed Randoms - Schematic - column drivers

High Speed Randoms – Schematic – column drivers

All of which make the common-anode RGB LED matrix blink merrily away:

High Speed Randoms - Schematic - 8x8 RGB LED Matrix

High Speed Randoms – Schematic – 8×8 RGB LED Matrix

Now all it needs is a dollop of source code…

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