HDMI whisperer: Unterschied zwischen den Versionen

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==What==
 
==What==
Our HDMI switches provide only a classic infrared remote control, to interface with [[Slackomatic]] we replaced the infrared receiver with a few wav files and a small custom-built level shifter.
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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.
 +
 
  
 
==How==
 
==How==
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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.
 
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.
 +
  
 
==Data==
 
==Data==
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# [[:Datei:Input_hdmi4.wav|HDMI 4]]
 
# [[:Datei:Input_hdmi4.wav|HDMI 4]]
 
# [[:Datei:Input_hdmi5.wav|HDMI 5]]
 
# [[:Datei:Input_hdmi5.wav|HDMI 5]]
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[[Datei:Wandlerumgs.jpg|345px|right]]
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==Schematic==
 
==Schematic==
 +
Circuit
  
Circuit (n.b: the supply voltage is actually 3.3V instead of the shown 5V. As NPN transistors we took 2x BC547B from Metalab's [[Bauteilsortiment#Transistoren|electronic parts stock]]):
+
the supply voltage is actually +3.3V instead of the shown +5V.  
  
[[Datei:Wandlerumgs.jpg|miniatur,left]]
+
As NPN transistors we took 2x BC547B from Metalab's fine [[Bauteilsortiment#Transistoren|electronic parts stock]]).
  
 +
<br clear=all>
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==Pictures==
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[[Datei:HDMI whisperer.jpg]]
  
[[Datei:HDMI whisperer.jpg]]
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__NOTOC__
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[[Kategorie:Projekte]]

Version vom 22. November 2015, 16:45 Uhr

Language: English
Subpages:
HDMI_whisperer hat keine Unterseiten.


HDMI whisperer
HDMI whisperer.png
Gestartet: 21.11.2015
Involvierte: User:Phaer User:m68k User:Pk
Status: active
Beschreibung: It's a custom-built remote control interface for our cheap Chinese HDMI switches
Shutdownprozedur:
Zuletzt aktualisiert: 21.11.2015

What

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.


How

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.

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.


Data

Wav files with the recorded IR commands:

  1. HDMI 1
  2. HDMI 2
  3. HDMI 3
  4. HDMI 4
  5. HDMI 5
Wandlerumgs.jpg


Schematic

Circuit

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).


Pictures

HDMI whisperer.jpg