Projects for geeks


15 Jul 2012
Android screenshot

The goal of this tutorial is to show how to remotely control brightness of the LED using BeagleBone Linux powered board.

BeagleBone will run web service that allows to control LED using simple web application. Thanks to that you do not need to install any extra software. Any device that has web browser installed can be used as remote controller, e.g. smartphone, laptop etc.

17 Mar 2012

This is a project of the simple wheel. Since factory made wheels prizes are not very attractive (10€ for a piece of plastic does not look good), it’s cheaper to make it yourself. The wheel is optimized to be printed on 3D printer.

01 Jul 2011

The robot is able to balance on two wheels.
Originally this project was created using only junk parts to test software for electric unicycle. But as time passed the initial design was upgraded. At the beginning robot was using 2 hacked car lamp servos as motors, ATmega16 board, quickly assembled motor controller based on L293 and the only brand new part: gyro + 2 axis accelerometer board.

11 Nov 2010

Gear Position Indicator displays gear number for motorcycles, scooters or cars.


  • Displays gear number without delay
  • Cool animation modes
  • LED matrix display
  • Automatic brightness
  • Temperature sensor
  • Celsius and Fahrenheit scale
  • Software display rotation
  • Many configuration options

15 Jan 2010
Phototrigger picture


  • periodically shots a photo allowing time lapse photography (can be combined with bulb mode), max time between photos: 99:59:59 (h:m:s),
  • bulb time (maximum 99h 59m 59s),
  • postponed start (up to 24 h in advance),
  • powered by 2 AA(A) batteries (3V),
  • 2×16 characters LCD display + encoder for easy control,
  • easy to use software,
  • minimal number of components, small PCB,
  • RTC clock (no calendar),
13 Jun 2007
Grabber picture

The open/close manipulator is useful tool to retrieve small objects or attach a line to objects located underwater.

The jaws of are driven by the electric screwdriver. Using electric screwdriver has many advantages:

  • Easy available
  • Cheap, cost about 5€.
  • Powerful - 2.4Nm
  • Planetary gearbox

06 Dec 2006
RS485 board

RS485 is an alternatve for RS232 for long distances. Maximum length of the cable for RS232 is only 15m. For RS485 it is about 1200m. In addition you can connect many devices to RS485 bus (unlike RS232 — only 2).
Send/receive mode is selected by RTS signal. The converter was designed to be as simple as possible, so it has no some features that can be found in commercial grade products (e.g. galvanic separation).

05 Dec 2006
Control Unit board

Device was designed to be used as control unit for ROV or any other remotely controlled robot. As primary communication interface is used RS485. It allows controlling robot using 1200m long cable.
Several other interfaces allows reading data like temperature, depth and heading.

Normally ROV receives commands from the surface and sends back data read from sensors. Special software has to be written to perform this task.


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