pataroulis Posted March 31, 2009 Report Share Posted March 31, 2009 Couldn't find something like it so I ask thee here. Could I use +-15Volt PSU instead of +-12V for AOUT_LC (for midibox CV, SID and seq)Thank you all!Aris Quote Link to comment Share on other sites More sharing options...
Futureman Posted April 1, 2009 Report Share Posted April 1, 2009 I'd advise against giving something +-15Volts when +-12Volts is required..But, it'll be a piece of piss to convert a +-15 to +-12.. assuming it has normal boring regulators in it..Look for the 7815 and the 7915 regulators and swap them with 7812 & 7912's respectively.RegardsMikeedit.. and if you can't get inside your power supply or it's not practical, you could use the +12volt & -12volt regulators to drop the +-15 to +-12Volts.. Quote Link to comment Share on other sites More sharing options...
/tilted/ Posted April 1, 2009 Report Share Posted April 1, 2009 See here:http://www.midibox.org/forum/index.php/topic,12531.0.htmlSummary: the TL072 (the only chip in the design which gets +/- supply) will happily run on +/-15V. Quote Link to comment Share on other sites More sharing options...
pataroulis Posted April 1, 2009 Author Report Share Posted April 1, 2009 Thanks guys for the answers, I will put it under 15 v and tell you what happens (probably nothing)The thing is that my modular setup has a +-15 v PSU I've made and I wouldn't like to downgrade it since it will feed some yusynth modules as wellSo I'll check it and get back to you Quote Link to comment Share on other sites More sharing options...
pataroulis Posted April 7, 2009 Author Report Share Posted April 7, 2009 Ummm.. it seems I've done something wrong and I've done it twice.. When I set it to 12/4 bits, the 4bits seems to work (almost) but all the others are just dead.. I have to follow the signal trail up to TL072 to see if the problem is on the opamp or at the 74hc595.. When I go to calibrate, it is just the same voltage throughout the range. :( Quote Link to comment Share on other sites More sharing options...
seppoman Posted April 7, 2009 Report Share Posted April 7, 2009 just to be sure, you know that you first need to recompile/upload your application with AOUT mode set for aout_lc? just today there was another midiboxer on the chat who tried to get the LC running and didn't know this. E.g. the Seq app is set for a regular (MAX525) AOUT by default, which gives strange results when using this setting with a LC.S Quote Link to comment Share on other sites More sharing options...
pataroulis Posted April 7, 2009 Author Report Share Posted April 7, 2009 AAAAAAAAAAAAAAAARRRRRRRRRGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHH!I'm a pure cretin!! Quote Link to comment Share on other sites More sharing options...
seppoman Posted April 7, 2009 Report Share Posted April 7, 2009 Haha :Dglad I could help :) Quote Link to comment Share on other sites More sharing options...
pataroulis Posted April 9, 2009 Author Report Share Posted April 9, 2009 Works like a charm now!! So to answer my own question +-15volts will do fine on aout_lc!Thank you all guys!(and sorry for my stupidity :-[ Quote Link to comment Share on other sites More sharing options...
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