hi
my hardware for led disply board is in the attachment file .
and i need help for the basic program for drive it.
(in the bascom or fastavr)
can anybody help me?
thanks.
Can you share the diagram with me because i also doing the same project.
i using the pic16f877a and shift register to control the LED dot matrix.
but i dont know how to drive the shift register to shift the text from column to column.
Can you share the diagram with me because i also doing the same project.
i using the pic16f877a and shift register to control the LED dot matrix.
but i dont know how to drive the shift register to shift the text from column to column.
Thanks
hi
you can download it from this tpic
i uploaded it in this topic .
but i can not write a program for it.
the onnection diagram is ok.
u cant download it?
Sorry I don't use AVR micro's but looking at it it looks a bit over the top if it's for a volt meter
blueroomelectronics here you go
the other question I would ask is you can't write the code and you want some one to do it for you ?
well how much are you willing to pay some one, we all like to help but asking some to write the code for you is a bit of a cheek I think, the way i lopok at it I'm willing to help others who are willing to help themselves.
Design is incomplete, no column driving transistors, no LED current limiting resistors.
The 74HC164 can source 20 ma per pin but the entire chip can only deliver a total of 50ma so you have to limit the current per pin to 50/8 or 6.25ma per LED.
Might work in a simulator but not real life.
PS Wizpic read your personal mail, I've sent you a letter.