Tobias – Page 8 – www.haegi.org

27. April 2017

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clickButton Library for MCP23017

I had some issues with our implementation of the click detection on the smartswitch. While searching for a better solution I stumbled accross the arduino clickButton library which is already ported to the photon.

Unfortunately the clickButton library is only working with photon/arduino pins and is not supporting a MCP23017 port extender which is used by the smartswitch. To fix this issue I modified the library for the use of an MCP23017.

The sources are on github: https://github.com/Trekky12/clickButtonMCP.

16. September 2016

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Projects » OSMC / Ambilight

Ambilight for all HDMI sources

Since my ambilight installation is only usable for videos which are played directly from the Raspberry Pi I decided to upgrade the installation to support all HDMI sources.

Therefore I followed a german tutorial which can be found here: http://powerpi.de/ambilight-fuer-jedes-hdmi-geraet-die-ultimative-schritt-fuer-schritt-anleitung/

Parts:

USB videograbber
HDMI 2 AV Converter
HDMI-Splitter
Cinch-Connector (S-VIDEO)
HDMI switch

Installation:

All input sources are connected to the HDMI switch. (computer, Raspberry Pi, cable receiver).
The output of the switch is connected to the HDMI-Splitter where one cable is connected to the TV and the other one is connected to the HDMI 2 AV Converter.
The HDMI 2 AV Converter converts the input signal to a AV signal which can be read by the USB videograbber.
The output of the videograbber can be processed by the Raspberry Pi and the underlying Hyperion instance.

25. August 2016

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Projects » Misc

Gamepad2Keyboard Mapper for Dosbox on the Raspberry Pi

To play some old computer games with RetroPie I installed retrosmc on my Raspberry Pi running OSMC.

I was trying to play the retro game “Wacky Wheels” with DOSBox. Unfortunately my USB Gamepads were not able to handle the configuration of the input. So I wrote a small python script which maps gamepad inputs to keyboard inputs.

The script is shown below. It is executed with the start-script of “Wacky-Wheels” in “/home/osmc/RetroPie/roms/pc”:

#!/bin/bash
python /home/osmc/joystick.py &
JOYSTICK_PID=$!
/opt/retropie/emulators/dosbox/bin/dosbox -c "mount c /home/osmc/RetroPie/roms/pc" -c "c:" -c "cd WACKY" -c "WW.EXE" -c "exit"
kill $JOYSTICK_PID

Also it is important to have joysticktype=none in your dosbox-SVN.conf

13. November 2015

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Projects » WordClock

Photon WordClock

Recently I received the Particle Photon and developed a WordClock with the help of a WS2812B LED Strip.

The LEDs are cutted and arranged in a way described in the mikrocontroller.net article. The front plate and the inner grid are laser cutted by formulor.de and inserted in a 23x23cm RIBBA Frame of Ikea. Between the front plate and the inner grid is a white piece of paper to diffuse the light of the LEDs. The LEDs are glued to a Hartschaumplatte and connected to the Particle Photon. For adaptive lightning there is a LDR resistor attached.