RKMIX - RummyKub Mixer

RKMIX automatically mixes a set of RummyKub pieces and spits them all out on the table lying face-down.

RKMIX has 3 components:

• mixing drum
• colorSensor
• switch and turn-around mechanism

mixing drum

The mixing drum is driven by a pair of stepper motors Schrittmotor MOONS 1454HS5405-01N - NEMA 14 B - 1,8Grad.

• If the motors turn in the SAME direction, the drum is rotating and therefore MIXING the pieces in it.
• If the motors turn in the OPPOSITE direction, the drum carriage will be TILTED in order to empty it into the sorting Chute.

mix drum motor drive

connection to A4988 driver

one driver module per motor (Schrittmotor MOONS 1454HS5405-01N - NEMA 14 B - 1,8Grad).

motor has 2 coils:

• A-C coil
• B-D coil

Thus, 4 wires

driver has 4 outputs

• 1A, 1B
• 2A, 2B

Wire	Wire color	Connector pin number	driver output
D	BLUE	1	2B
B	RED	2	2A
C	GREEN	3	1B
A	BLACK	4	1A

(zu ergänzen)

color sensor

(zu ergänzen)

calibration

• RKMIX color sensor calibration

switch and turn-around mechanism

(zu ergänzen)

Software

Base Material:

• EdjeElectronics Playing Card Detecor:
  • Github page
  • Youtube Video demonstrating the card detector

Variant A: Detect Face with OpenCV

This uses a Raspberry Pi Model B Version 3, running OpenCV.

Setting up the Rapberry Pi with OpenCV

• http://www.life2coding.com/install-opencv-3-4-0-python-3-raspberry-pi-3/
• https://www.pyimagesearch.com/2018/09/26/install-opencv-4-on-your-raspberry-pi/

In OpenCV 4, drawKeypoints works differently as compared to OpenCV 3: https://www.google.com/search?client=firefox-b-d&q=opencv+4+drawkeypoints&client=firefox-b