zephyrin Posted December 28, 2012 Report Share Posted December 28, 2012 i have bought some led Digit display like this http://www.lenoo.com/ec99/myyp090083/GoodsDescr.asp?category_id=51&parent_id=0&prod_id=2066 I wanted to konw how connecting The 3 DIGT on the DOUT. Quote Link to comment Share on other sites More sharing options...
TK. Posted December 28, 2012 Report Share Posted December 28, 2012 The default configuration is: ; === BPM digits === ; ; set to 1 or 2 to enable the 3 optional BPM digits ; 0: BPM digits disabled ; 1: digits with common cathode ; 2: digits with common anode #define DEFAULT_BPM_DIGITS_ENABLED 0 ; ; define the shift register to which the segments are connected (0=disabled) #define DEFAULT_BPM_DIGITS_SEGMENTS 5 ; define the shift register to which the common pins (cathodes or anodes) are connected (0=disabled) #define DEFAULT_BPM_DIGITS_COMMON 6 You would have to set the DEFAULT_BPM_DIGITS_ENABLED either to 1 or 2, depending on which LED digit you got (your link doesn't make this clear). Here a link to the MBSEQ V4 schematic: http://www.ucapps.de/midibox_seq/mbseq_v4_bpm_digits.pdf MB808 only supports 3 digits (since BPM is working at .0 resolution), therefore connect: - the common line of the first digit to D2 of the DEFAULT_BPM_DIGITS_COMMON DOUT - the common line of the second digit to D1 of the DEFAULT_BPM_DIGITS_COMMON DOUT - the common line of the third digit to D0 of the DEFAULT_BPM_DIGITS_COMMON DOUT Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
zephyrin Posted December 28, 2012 Author Report Share Posted December 28, 2012 Thank you Thorsten, Can i used D3 D4 D5 ect ... of the DEFAULT_BPM_DIGITS_COMMON DOUT for led ( for exemple for Beat, Recod and live switch) If yes, i need to used resistor for the D3 D4 D5 ect ... ? Quote Link to comment Share on other sites More sharing options...
TK. Posted December 28, 2012 Report Share Posted December 28, 2012 No, unfortunately the DEFAULT_BPM_DIGITS_COMMON assignment allocates the complete SR Reason: if you would add additional LEDs, they wouldn't be so bright anymore since the DOUT is used as current source for all 7 segments of the digit. Therefore such an option hasn't been considered in the firmware configuration. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
zephyrin Posted December 29, 2012 Author Report Share Posted December 29, 2012 Thorsten, it's correct that the a,b,c,d,e,f,g and dot connection is sahred (the same) for the 3 displays and only cathode (or anode ) are separate ? Quote Link to comment Share on other sites More sharing options...
TK. Posted December 30, 2012 Report Share Posted December 30, 2012 Thorsten, it's correct that the a,b,c,d,e,f,g and dot connection is sahred (the same) for the 3 displays and only cathode (or anode ) are separate ? yes - the segments are controlled time-multiplexed. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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