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can anyone send me the code that move image display to right in assemblly using AT89c51 or AT89c2051 on 10*16 dotmatrix. i dont know how to save shape of the charactors on Eprom n how to make message move when its a long sentence.plz help me
lesen guys ! im try ing to control my led display board by serial port or keyboard(which is better) but the program which i have is just for scrolling the text and even this text is in the flash of micro but i need to keep my charachter in the external (or internal) eeprom and then i call them according to the text which is requested by keyboard ... but i can't do it becouse im not very good in programing and olso i didn't findout the logic of how to do it !!!
can any one help me to improve this program to : getting text from keyboard and save it in the eeprom micro and show it , untill next text entered .(EVEN if we turned it off , it show that text after re turning on) ???
by the way, im not english and my alphabet is " persian" can any one guide me how to change english base of ' getting characters of keyboard ' ?
or donate me 100 points to download this files and study them?
Hi every one this project I made it . All is ok working but found shadow follow my massage. i dont know if can solve this problem.
i used at89c52 - 74138 - 4028 as shift registry
DB 80h,0ffh,0ffh,0ffh,80h,0b6h,0b6h,86h,0ffh,0ffh,0ffh,80H,0BFH,0BFH,0BFH,0ffh,0ffh,0ffh
DB 80h,0beh,0beh,80h,0ffh,0ffh,0ffh,80h,0b6h,0b6h,80h,0ffh,0ffh,0ffh,80h,0f7h,0f7h,87h,0ffh,0ffh,0ffh
DB 80h,0f7h,0f7h,87h,0ffh,0ffh,0ffh,80h,0b6h,0b6h,86h,0ffh,0ffh,0ffh,80h,0beh,0beh,80h
end
IS THERE ANY FREE WARE OR JAVA POWERED PAGE WHERE I CAN GENERATE
CHARACTER FOR OTHER DISPLAYS THAT MAY NOT NECESSARILY BE 5 BY 7 MATRIX? I MAY HAVE TO MAKE A DOT MATRIX THAT IS NOT USING 7 BY 5 MATRIX. AGAIN I PLAN TO HAVE 80 COLUMNS AT 40HZ SCANNING RATE. DOES IT MEAN I MAY HAVE TO APPLY 800ma CURRENT TO GET SAME INTENSITY AS 10ma CONTINOUS CURRENT?PLEASE I NEED TO HERE FROM MY FRIENDS OUT THERE.
IS THERE ANY FREE WARE OR JAVA POWERED PAGE WHERE I CAN GENERATE
CHARACTER FOR OTHER DISPLAYS THAT MAY NOT NECESSARILY BE 5 BY 7 MATRIX? I MAY HAVE TO MAKE A DOT MATRIX THAT IS NOT USING 7 BY 5 MATRIX. AGAIN I PLAN TO HAVE 80 COLUMNS AT 40HZ SCANNING RATE. DOES IT MEAN I MAY HAVE TO APPLY 800ma CURRENT TO GET SAME INTENSITY AS 10ma CONTINOUS CURRENT?PLEASE I NEED TO HERE FROM MY FRIENDS OUT THERE.
does anyone have idea of how to use external eeprom to store font lookup table and using serial communication from a terminal windows to type in your message, i may have to use up to forty columns
Added after 7 minutes:
bluemmetronics i dont think i am being unrealistic, i saw a guy who used atiny for his project and he wanted to explain the scanning stuff, but he said in his explaination that because the leds have to be on for a short time, you had to apply much more current and even went as far as showing how to do the calculation, so that was how i arrived at 800ma, but i am feeling that would be too much and that is why i had to come to the forum.
as for 50hz the guy advised that if your ac is a 50hz line, you should not use 50hz and same apply if you make use of 60hz ac line, he suggested between 40 and 70hz, you can check from wanadoe.com or something like that for the projects.
any comment? i am waiting and online now.
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