HDMI whisperer: Unterschied zwischen den Versionen
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==What== | ==What== | ||
| − | Our HDMI switches provide only a classic infrared remote control, to | + | 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. |
==How== | ==How== | ||
| − | The cheap [[:Datei:5_Ports_1080P_Video_5_to_1_HDMI_Switch_Switcher_Splitter_Hub_for_HDTV_PS3_DVD_IR_Remote_.pdf|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. | + | The cheap [[:Datei:5_Ports_1080P_Video_5_to_1_HDMI_Switch_Switcher_Splitter_Hub_for_HDTV_PS3_DVD_IR_Remote_.pdf|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. | This receiver was plugged into the audio port of a laptop and the generated audio was captured. | ||
Version vom 22. November 2015, 16:31 Uhr
| Language: | English |
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| HDMI whisperer | |
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| 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 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:
Schematic
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 electronic parts stock):
