Kentucky Derby

     

Kentucky Derby Release status: stable [box doku]
Description	PostInteractive Horse Race
Author(s)	A.B. (Bilex)
Platform	Gallop

Mechanics

Kentucky Derby was designed with Autodesk Inventor. The horses were manufactured with the CNC-Fräse the riders are laser-cut and most mechanical parts are

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Electronics

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  YNNOK en detail

Illumination

Two LED bars are in use as a status indicator. A handful BI-Color SMD-LEDs (SMP4-SBC) are mounted behind a piece of acrylic glass. If the door is open they shine GREEN or RED when the door is locked. In normal operation (closed but not locked) the color of both LEDs is changing slowly with ~30% of total brightness to save power. Unfortunately I realized too late that you need a higher PWM resolution than 8-Bit to do cool fading things including gamma correction.

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WiFi access

YNNOK uses a TL-WR1043ND WiFi router with OpenWRT to provide wireless access. The router comes with an USB port that is used to talk to a Teensy 2.0 Board programmed with Arduino. Several LUA scripts are used to send data via the serial port to the Teensy Board and then the data is transmitted via the RS-485 databus to YNNOK. The Teensy Board is redundant so far because the data could be easily transmitted via a USB -> RS-485 converter but in the future the board can do some more useful stuff like illumination dimming and so on. Update: Kitchen light can be controlled via Wifi.
YNNOK has an inner counter that counts up if the door status changes to OPEN. After door opening it sends back the new value via the bus. To read the counter ser2net is used. Just listen to the right TCP port and get the actual door count!

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  TL-WR1043ND and Teensy Board

Competitors & Winners

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Video

To be done..

Helpful Links

Teensy/Arduino WiFi with ser2net and OpenWRT