Elby DesignsED116 SH-Noise Expanded

Elby Designs ED116

The Elby Designs ED116 contains the same circuit as their ED115 module while adding some additional features. More specifically, it provides manual settings for the Red/Blue composition of the Violet noise, as well as rate control over the random source. 

The noise generator features a white noise output (produced by an NPN transistor), pink noise output (a combo of a 3dB octave filter and a buffer amplifier), violet noise output (featuring two frequency dependent elements in its feedback path), random noise output (essentially a 12dB/oct low-pass filter passing through low frequency components to produce a random voltage), and a digital random output. The digital random generates a +5V output each time the random voltage exceeds +2V, a -5V output when the voltage falls below -2V, and a 0V when the voltage is between -2V and +2V. 

The module also features a sample & hold section, which takes a random sample of the input and sends it to the output, resulting in a random voltage that changes in accordance with the positive edge present in the output.

ED116 Features

• White Noise output: Normalized to the S&H input
• Pink Noise output
• Violet Noise output
• Random Noise ouput: Normalized to the sample input
• Sample & Hold input
• Sample input
• Sample & Hold ouput
• 2 LED indicators
• Rate knob for Random noise
• Red and Blue level knob for Violet noise