Quantum Random Number Generator — Radon α-decay Entropy
METHOD   Slow-Clock LSB Extraction
DOCS   GitHub Repository
REAL QUANTUM RNG
This device generates true random numbers from the radioactive decay of Radon-222. When a Radon nucleus undergoes alpha decay, the exact moment of emission is governed by quantum mechanics and is fundamentally unpredictable. The RadonEye sensor detects individual decay events; our entropy engine extracts the pure randomness from decay timing via Slow-Clock LSB extraction, producing cryptographically-secure 16-bit random values. Unlike computational pseudo-random generators, this is authentic quantum randomness sourced directly from nature's quantum processes.
▮ Last Generated Random Number
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DECIMAL
GENERATED AT
BIT LENGTH32 bits
▮ Entropy Health
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BIAS SCORE
TOTAL BITS
ONES
ZEROS
▪ Selected Range


Packets
Bias |p(1)−50%|
⚑ Device
TYPE  ESP32-S3
SENSOR  RadonEye RD200V2
PROTOCOL  BLE 4.2
SOURCE   RadonEye RD200V2 • BLE C-Pulse
SERVER TIME   2026-05-01 12:41:10 UTC
SERVICE UUID
00001523-0000-1000-8000-00805f9b34fb
▩ Accumulated Raw Bias — Measurement by Measurement
The line shows the accumulated absolute bias after each 16-bit measurement packet. Early measurements are noisy and not very meaningful; after a few hundred measurements the curve should start to stabilise. Green is healthy, orange is borderline, and red indicates the bias has moved outside the safe margin.
□ Entropy Dispersion — 16-bit Values Over Time
Each dot is a 16-bit entropy packet. Good QRNG: dots uniformly scattered across the full [0, 65535] range.
▼ Recent Generated Random Numbers
Hex Value Decimal Bits Generated At (UTC)
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