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Jim Granville
09/10/15 20:24
Read: 533 times


 
#190569 - Sure, if you already have 12 x MAX7219
Responding to: Raghunathan's previous message
Raghunathan said:
Will the following idea be OK ?

1. I connect the segment displays in parallel for all 12 drivers and connect the header to the MCU port pins.
2. I connect the 12 nos CS pins of MAX7219 to 12 pins of MCU. Now I can send through SPI the required digit information to any of the 12 MAX7219 that I choose by controlling the CS line..


Sure, if you already have 12 x MAX7219.
However, as Erik mentioned, these days you can add a small 8051 and a 7 wide CMOS driver like ULN2003V12 for less than a MAX7219.



List of 7 messages in thread
TopicAuthorDate
One 89V51RD2 and 12 nos 4 digit LED modules      Raghunathan      09/08/15 08:23      
   shift registers      Jan Waclawek      09/08/15 12:44      
   LED drivers      Jim Granville      09/08/15 15:51      
      Why not many MAX7219 drivers?      Raghunathan      09/09/15 04:44      
         Sure, if you already have 12 x MAX7219       Jim Granville      09/10/15 20:24      
            Thanks to all those who responded      Raghunathan      09/12/15 20:47      
   might have been ridicolous, but      Erik Malund      09/09/15 06:44      

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