|Involvierte:||User:Phaer User:m68k User:Pk User:Jackie|
|Beschreibung:||It's a custom-built remote control interface for our cheap Chinese HDMI switches|
Our HDMI switches provide only a classic infrared remote control, to interface easier with Slackomatic we replaced the infrared receiver with a few wav files and a small custom-built level shifter.
The cheap Sindax 5 to 1 HDMI switches we got have an IR remote control that comes with a 3.5mm audio connector to plug in a cape with a
TSOP383 AX-1838HS IR receiver module.
This receiver was plugged into the audio port of a laptop and the generated audio was captured.
That gave us 5 different audio files.
The files were post-edited using Audacity and now we can simply play them and attach the audio out from the Raspberry Pi directly to the HDMI switch IR receiver port with a small piece of voltage converter logic in between.
Wav files with the recorded IR commands:
The more or less mono files from above split into stereo files with only the left or right channel in use
the supply voltage is actually +3.3V instead of the shown +5V.
As NPN transistors we took 2x BC547B from Metalab's fine electronic parts stock).