Saturday, 7 April 2018

The Book of Morse code


Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment. It is named for Samuel F. B. Morse, an inventor of the telegraph.
Source: Wikipedia

Tuesday, 3 April 2018

The Morse code


Impressed by tilted twister robots by Hans Andersson. I decide to work on my own project. The main goal was to make it easy to translate dots and lines into a simple mechanism that any LeJOS fan can build.

All that this person should do is upload using the EV3 Control Center a properly named file with specific states for the selected engine:

statetwister_motor_[a..d].txt


This uploaded file(s) should be have, plain text content with one number in each line. First line is dedicated to set interval of motor rotation. Second line and next lines is for set zero /0/ or one /1/ to change motor state.




Sunday, 4 June 2017

The Vise

A vise (American English) or vice (British English) is a mechanical apparatus used to secure an object to allow work to be performed on it. Vises have two parallel jaws, one fixed and the other movable, threaded in and out by a screw and lever.
 Source: Wikipedia


Monday, 22 May 2017

Conveyor belt with gantry


You can use this model with my rail trolley. But for better interaction with touch sensor you should add bumper between frame and black axle.
For this purpose, I created instruction, you can see on the right. For bigger version -- click on it.

Remember that motor connected to Port A support the direction of movement of the conveyor belt.

Changing the direction of the motor connected to port B is forced alternately by activating the touch sensor.

EV3 Brick assigned ports:
  :: Port 1 for ultrasonic sensor
  :: Port 2 for touch sensor
  :: Port 3 for touch sensor
  :: Port A for medium motor
  :: Port B for medium motor







Tuesday, 16 May 2017

Self-ropelled Rail Trolley

This machine is dedicated to, move on toothed bar or elements with rack, like this one:

  Toothed Bar
  Gear Rack

The base element, that everything is building on is Technic Liftarm 5 x 11 Open Center Frame Thick
Thanks to the size of  used micromotor; I can build more lighter model and have more free space inside the frame.




Wednesday, 26 October 2016

Document scanner with feeder


This is prototype of paper scanner with simple feeder. This version support only one|two sheet of paper per cycle.

Software for this model use openCV to capture and processing with images. You can use web camera that support MJPEG format for this task. For more go to LeJOS Blog.



EV3 Brick assigned ports:
  :: Port 4 for Color sensor
  :: Port A for medium motor
  :: Port B for large motor
  :: Port USB for external camera