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Hi all
I design Moving LED Display very quickly, just to satisfied my self, for this moment I just implement fix message, but can be very easy expend to change the message by push buttons, also any character you can design by your self and implement to the software another advantage, is the message board can be cascaded up or to the side, depend of the size you need. I used PIC16f84A but can by PIC16f628A or any similar. Using only FOUR pin from the Micro to rum LED’s, so ret can be used for anything else (push buttons, LCD …..).
guys I was wondering, for rojo's display, as in page one and two. Is it possible to use LED matrixes?
i am trying to use them now, but i was just wondering, if i use LED matrixes, the data from each row is connected to each block meaning, (one to each of the blocks for each row). however, if i use LEDs, and connect them as shown, i only have one connection to each row. Or maybe it doesnt matter how it is connected as long as the rows are connected to it?
Yes it would be easier if ROJO leads the way by showing us how to wire just one 8x8 Matrix in we could do the rest.
I am planning to make this project in two half, one is the Display part and one is the controller part. The display part is the costliest part in the project and one should really plan out the design. I believe the path is straight forward. The controler part can come in many flavours, Like PIC, ATMEL, FPGA, etc.
dude~! hoho, yeah, I actually built the same thing as rojo did.(gosh, thank him). But now i'm facing a problem with the LED matrix. I dont know if it would work if i connect them.........as you know each led matrix block's last led on each column is NOT able to be connected to the next led block's 1st column. Therefore, the rows are not all in series. Would that be a problem? or does the main control done by the column shift registers? cos with LED blocks, to connect every block, you hafta connect the 1st colum leds to the next column leds for row control. and with this, lets say you have 5 led blocks, it meahns that all 5 are directly connected to the input from the row controller. so, is it that by doing this, at one point, all blocks will display the SAME thing instead of scrolling? or its is allright because the shifting is done by the column drivers?
Hello,
I am making my moving sign using 20*(8*8) matrix LEDs. With row-scanning method, (40/5)*10(mA)*(8dots*20LEDs)=12.8Apeak, so I have to use 8*IRF530N as row-drivers. The problem now is: what is the power supply I should use for my 12.8A circuit? How big is it? Do you guys have any idea?
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