Zen Dice II
A truly random electronic dice and random number generator, times two.
Zen Dice II uses Zener avalanche technology to generate truly random dice rolls, decisions, and random numbers. The display is a pair of three color 8x8 LED arrays. Self-diagnostics insure that the random number generator is working reliably.
There are seven modes to choose from, click on a thumbnail for a bigger picture:
Double 6-sided Dice
Double 20-sided Dice
Double Heads/Tails Coin Flip
Double Yes/No Decision Maker
Decimal Random Number Generator
Hex Random Number Generator
Random 3-color Stars
Press the POWER/MODE button to power on and select the desired random generator mode.
Hold the POWER/MODE button for 2 seconds to power off.
Press a ROLL button to generate a random result.
The device will automatically power off after 5 minutes of inactivity.
The POWER/MODE button cycles through the operating modes, plus the diagnostic modes if they are enabled (see below).
|Mode #1 - 6 Sided Dice||Two independent 6 sided dice.|
|Mode #2 - Heads/Tails Coin Flip||Two independent coins. 'H' for Heads, 'T' for Tails.|
|Mode #3 - Yes/No Decision Maker||Two independent decisions. 'Y' for Yes, 'N' for No.|
|Mode #4 - 20 Sided Dice||Two independent 20 sided dice.|
|Mode #5 - Decimal Random Number||Two independent random number generators, 0 to 99.|
|Mode #6 - Hex Random Number||Two independent random number generators, 0x00 to 0xFF (0 to 255).|
|Mode #7 - Random Stars Display||Continuous display of pixels chosen by the random number generator.|
The self-monitoring checks the random number generator hardware parameters to make sure that it's operating reliably. If it's not operating within specifications then an error code will be displayed when a ROLL button is pressed.
|E1||Boost voltage out of range|
|E2||RNG signal rate not rational|
|E3||Probability space reduction failed (indicates bad RNG source)|
To enable the additional diagnostic modes hold down the left ROLL button while powering on.
|Diagnostic #1||Displays the boost voltage, which should be between 19 and 21 volts|
|Diagnostic #2||Displays RNG min and max events/ms, should be between 10 and 200|
|Diagnostic #3||Statistical analysis results for maximum run length of 0's and 1's|
|Diagnostic #4||Statistical analysis results for 0/1 bias test|
|3D Print Files||mechanical_j720_zen_dice_2.zip|
|Source Code (Arduino)||code_j720_zen_dice_2.zip|
|Source Code (PHP)||php_j720_zen_dice_2.zip|
|Power Requirement||5V Micro USB Charger|
|Dimensions||103x103x26 mm (4x4x1 in.)|
|Available fully assembled and tested|
|Buy it at Tindie|