Guest steeg Posted August 28, 2003 Report Share Posted August 28, 2003 I'm just tinkering with the idea of building a very simple knobbox based on the midibox plus, and was just wondering if it would work like this http://home.no/steeg/midiboxplus_simple.gifjust erasing the things I don't need :)i would only need one bank, and program the pots with sysexmaybe someone also could help me look over my parts list, so i don't miss anything8 Pot 10k lin1 PIC18Fxxx1 10MHz crystal (paralel cut)1 74HC001 6N1381 78053 LED2 Female MIDI (5pin DIN)1 Diode 1N41484 Diode B40C8001 Power 500mA 7-10VResistors1 100 Ohm1 1k1 1,2k1 5,6k3 2203 4702 100kCeramic Capactitators2 33pF1 330nF1 100nFPolarized Capacitators2 1uF1 2200uF1 10uF Quote Link to comment Share on other sites More sharing options...
TK. Posted August 30, 2003 Report Share Posted August 30, 2003 Everything ok, but you should add the 4 10k pull-up resistors to RC0-RC3, otherwise the box will generate random events due to open inputsBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
Guest steeg Posted September 11, 2003 Report Share Posted September 11, 2003 Why is that, is it something with the program for the pic, or is it a hardware thing with the pic?I was also thinking about adding a led as value indicator for each pot, would this require rewriting the pic-code?I might also go for a button for each pot to set the init value to the current value. This could be done, right? Which connectors could be used for this? I wouldn't have any problems with rewriting the code to fit my needs..Thank you very much for your answer. Quote Link to comment Share on other sites More sharing options...
TK. Posted September 12, 2003 Report Share Posted September 12, 2003 Why is that, is it something with the program for the pic, or is it a hardware thing with the pic? This is a hardware related topic.I was also thinking about adding a led as value indicator for each pot, would this require rewriting the pic-code? I might also go for a button for each pot to set the init value to the current value. This could be done, right? Which connectors could be used for this? I wouldn't have any problems with rewriting the code to fit my needs.. This cannot be done without removing existing features due to memory limitations.I can send you the source code (-> request it via EMail), but please note that I don't support the PIC16F projects anymore. PIC16F programming definitely makes no fun, especially the PIC16F MIDIbox firmwares are everything else than expandable since I had to use a lot of dirty programming tricks to get so much functions as possible into the small memory. Several people who tried to integrate new functions finally gave up.If you want to do the right step, if you want to program new functions without so much effort like for the old PIC16F firmwares, then switch to MIOS!Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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