retropie

Bringing back classic retro games to live with RetroPie

Back in the 1980s and 1990s console games were king. Not so much for the graphic quality, but because there was no competition. There was no mobile phones and Internet had limited use in scientists lab and military ships. If you want to know what if felt like when your…

Internet Rover with Raspberry Arduino DFRobot Romeo board, taking commands from a website

New DIY shop in Victoria!

Elmtree Computers & Hobbies supply you with the most exciting electronic inventions to support your innovation and hobby needs. They supply Internet of Things, edgy computer technologies, as well as the classic electronic components that make up most of the computing world these days such as resistors, capacitors, and transistors….

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How to run logout script or sound on Linux XFCE

Most of you would know how to run script on boot / session login on Linux, but not on logout / shut-down. Here is one way you can do it: Change the /usr/bin/xfce4-session executable with a shell script which runs the original xfce4-session and your logout script if xfce4-session finished….

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How to drive 2 DC motors with Raspberry Pi 2 GPIO and DRV8833 chip

DRV8833 sells for around $6, but it performs beyond expectation without all the flufy hardware surrounding your typical motor controller extension board or hat. With stand-up pins, it could sit nicely on a breadboard or permanent proto-board. What you need in this setup: Raspberry Pi 2 SD Card running Raspbian Power…

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Object detection based on color (colour) with Python 3, OpenCV 3, Pi Camera, and Raspberry Pi 2

This Python 3 code will mark a blue object in the screen, mark it with a red dot and each time the object moves, the red dot will follow it. The application of this could range from robot vision to automatic video camera. Feel free to adjust the treshold setting…

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