i already try it...can you suggest an IC, that would be lest components needed and low cost? my problem realy is finding and IC, other IC could do that, but with some resistor and darlington pairs...etchuzaifahm said:Visit https://www.sparkfun.com/datasheets/Components/FYM-20881ABxx.pdf for a datasheet. It is just one of many dual-color matrices available.
If you have driven a single color matrix. What you need to do first is drive 2 or three at once. You should use 74595 shift register to input data to columns and use 7445N to select rows using 1/8 scanning method.
Then for the dual color, scheme is the same except, in single color you had one 74595 for each matrix, now you will have two. 4094 is much better than 74595 for driving dual color matrices.
Let me know if you need further help.
dual Color( red and Green) about elektor...i already read that topic...thanks.zuisti said:Hi leoren_tm,
I don't know exactly what do you want (what means the "dual Dot-matrix") but I'm attached here my old projects about this thema. These are using at89c2051 and 6 or 8 pieces of 7*5 LED dot matrix modules. I think the 7*5 is enough but it's easy to modify the circuits and the programs to 8*8 matrix.
For this projects I'm used Proteus because it can be simulate the circuit, if you don't have it, the circuit screenshots are also included.
Study first the original PDF from ELEKTOR (included in the folder ORI in the zip), this was also my start point.
Hope this helps
zuisti
leoren_tm said:does proteus support MCU programming?
Hi;leoren_tm said:"base drive impedance"
cayou explain it futher? i think shodowing could be elimated by blanking...by means of your sofware..
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