dontplaymygame Posted March 18, 2008 Report Share Posted March 18, 2008 hi can any one tell me if i still need to connect the resistors to the inputs of the din module if im using normally open buttons?and can i use this link http://www.ucapps.de/mbhp/mbhp_dinx4_32buttons.pdf as my guide line?10x Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted March 18, 2008 Report Share Posted March 18, 2008 Yes, you need the Pull-upsThese pull-up resistors are required if buttons are connected to the digital inputs. They ensure that the pins are supplied by defined voltage levels when a button is not closed (pressed). If you are using the DIN module with a MIDIO128, you maybe want to drive the pins "high-active" (which means: +5V = on, 0V = off). In this case please solder the two red isolated cables not to 5V, but to 0V (Vss), so that the resistors act as pull-downs.Your MIDIbox will send a lot of random MIDI traffic without these pull-ups, so don't miss them!Source: http://www.ucapps.de/mbhp_din.htmlGreets, Roger Quote Link to comment Share on other sites More sharing options...
/tilted/ Posted March 18, 2008 Report Share Posted March 18, 2008 hi can any one tell me if i still need to connect the resistors to the inputs of the din module if im using normally open buttons?This is not a special case.Normally-open switches (NO) are the standard.For the record, if you were using normally-closed switches (NC), you would still need the pull up/pull down resistors. Quote Link to comment Share on other sites More sharing options...
dontplaymygame Posted March 19, 2008 Author Report Share Posted March 19, 2008 cheers Quote Link to comment Share on other sites More sharing options...
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