ilan Expert Licensed User Longtime User Nov 9, 2017 #1 hi i have a dot matrix that i would like to connect to my arduino and turn on some leds int it. is there a example how to do it with b4r? this is the unit i have:
hi i have a dot matrix that i would like to connect to my arduino and turn on some leds int it. is there a example how to do it with b4r? this is the unit i have:
KMatle Expert Licensed User Longtime User Nov 10, 2017 #2 I think you need a bit-shifter like this: https://www.sparkfun.com/products/13699 I bought a package for my raspberry and it was with the matrix display. Tutorial: http://www.instructables.com/id/LED-matrix-using-shift-registers/ Reason: you have 8x8 = 64 pins on that led but only "7 or 8" pins on your arduino (I assume) = You can address one row only. Good luck Upvote 0
I think you need a bit-shifter like this: https://www.sparkfun.com/products/13699 I bought a package for my raspberry and it was with the matrix display. Tutorial: http://www.instructables.com/id/LED-matrix-using-shift-registers/ Reason: you have 8x8 = 64 pins on that led but only "7 or 8" pins on your arduino (I assume) = You can address one row only. Good luck
derez Expert Licensed User Longtime User Nov 10, 2017 #3 See this https://www.b4x.com/android/forum/threads/74hc595-shift-register-for-multiple-output.71531/ for code example, the code is for color matrix so yours should be simpler. Upvote 0
See this https://www.b4x.com/android/forum/threads/74hc595-shift-register-for-multiple-output.71531/ for code example, the code is for color matrix so yours should be simpler.