Zlob Modular - Entropy

Entropy is a small 3hp analog random voltage and noise generator. It centers around a sample and hold circuit normalled to white noise, with a toggle switch selecting between sample or track and hold modes. You get three colored noise outputs (white, pink, brown) plus a smooth random CV output.

The smooth random section called "Infra" offers two ranges via another toggle. The left position gives active, wiggly modulation, while the right position produces slower, broader voltage movements. A PCB trimmer (at the top of the motherboard) adjusts the white noise amplitude, which affects the rate of the smooth random changes. LED soldermask windows show positive and negative voltage crossings, and the sample and hold has typical analog droop characteristics.

This is straightforward analog randomness without digital processing - just hardware-generated voltages and noise for modulation and texture in your patches, a good tiny random utility.

Features:

• Small Analog Randomness Generator
• Sample/track and hold normalled to white noise
• Adjustable random voltage spread via PCB trimmer
• White, pink, and brown noise outputs (10Vpp)
• Smooth "Infra" random CV with dual range settings
• LED voltage crossing indicators (red/blue)
• Reverse power protection

Geek Curiosa:

The "droop characteristics" refer to how analog sample and hold circuits naturally lose voltage over time — like a leaky bucket. When Entropy samples a voltage, it slowly bleeds away at about 600mV after 5 minutes and 1.2V after 10 minutes. This isn't a flaw but classic analog behavior that adds character, creating subtle voltage drift rather than perfectly static held values.