16x64 LED Matrix Digital Clock (www.silvesterdao.com)

[alleexx6]

maybe you have orcad desing of this, I realy like it

[ssdao]

8051 is enough.

[MetalpREY]

Hi, nice work! question: did you use any eprom or other external memory to read the caracters data for the rows? or the rom capability of 8051 is enough? thanks for you answer, i´m from Argentina

[Vlakpage]

8051 can do this fine, you need fast I/O, not some bogus theoretical max MIPS and btw there are one-clockers to at least 100 MHz

[ssdao]

@Vlakpage 8051 has many variants, the one i used is traditional one with 512 bytes ram, 24MHz clock. Using SPI will help but 32-bits MCU is cheaper nowadays...

[ebfr]

23:33:59, 23:34:00, 23:34:02? Where did 23:34:01 go? And 23:33:52?

[ssdao]

@ebfr internally the rtc counting the seconds but the display needs more than 1 second update. it can be fixed by updating time to display more frequently or always updating the time to display.

[daxweb]

hi...

what's the medium ampere draw of matrix?

[ssdao]

@daxweb: 500-1000mA. sometimes less than 500mA if only few LEDs on.

[ssdao]

I don't have the LED module schematic man. since i bought the module ready made by many home industry in China. I just hook-up my mcu with the module.