jayhartigan Posted December 15, 2015 Report Share Posted December 15, 2015 I am making a TRRS-TRS cable to output code from a Tentacle to Denecke app on a iPhone or iPad. As I type this I wonder if the iPad has a mic input as the iPhone does. I'm using an iPhone 6S to test this. I have tried several obvious combinations but none seem to work. Can anyone give me advise on how to wire this simple cable? Is this as difficult as it seems to be? I'm feeding mic out of the Tentacle. Thanks Jay Quote Link to comment Share on other sites More sharing options...
jayhartigan Posted December 15, 2015 Author Report Share Posted December 15, 2015 I should have checked the Denecke web site before I wrote this post. They make it pretty clear I need to add a 1K and .022uf cap to the circuit. That'll be a trick. Quote Link to comment Share on other sites More sharing options...
TomBoisseau Posted December 15, 2015 Report Share Posted December 15, 2015 Quote Link to comment Share on other sites More sharing options...
jayhartigan Posted December 19, 2015 Author Report Share Posted December 19, 2015 I am doing something wrong. Using a .022uF cap parallel to a 1K resistor I can see code on the Denecke app using the scope tab but it says "no valid input" and no numbers from a Tentacle output at mic level. Does anyone have any insight into this problem? Quote Link to comment Share on other sites More sharing options...
Wandering Ear Posted December 19, 2015 Report Share Posted December 19, 2015 It may be a sign strength issue. If I remember correctly there is a signal level meter in the app and signal should be in the 70-80% range. Quote Link to comment Share on other sites More sharing options...
Shastapete Posted December 20, 2015 Report Share Posted December 20, 2015 Do you have the 100k resistor in your circuit? That pads a line level signal down to mic level for the iDevice. i suggest turning up the output level of the timecode in the tentical Quote Link to comment Share on other sites More sharing options...
jayhartigan Posted December 20, 2015 Author Report Share Posted December 20, 2015 I used the no pad directions as I can easily reduce the level at the Tentacle. I'm trying to reinvent the wheel and maybe I should just buy the cable already made up. Quote Link to comment Share on other sites More sharing options...
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