Neon effect

[andrej]

Hi,

pls, can anyone help me to achive a "neon effect" with 6 or 8 SMD led-s and 12F629 or 16F84 in PBP.
Example is in attach.

For sequence of lighting individual LED can be used numbers stored in EEPROM instead of random generated.

Thanks,

Andrej

[Jerson]

Yes, are you willing to pay for this?

[andrej]

...are you willing to pay for this?

No, no

I didnt mean to commercialize yours idea.

Im just hobiest in model railroading with some knowledge of PIC programming, and I want to illuminate my layout.

I did not mean a complete code, maybe a snippet for effect of one LED.

Thanks, anyway !

Andrej

[Jerson]

You could use 8 outputs to drive the smd leds. Have a table of bytes to write as the 'effect' you want. Then, sit in a loop doing this

counter = 0
loop:
counter = counter+1
if counter > tablesize then counter = 0

read byte from table[counter]
write byte to the port
pause for as long as you want

goto loop

This should get you started.

Jerson

[andrej]

Thanks,

I will try some, but how can I randomize a sequence of lighting according a numbers stored in EEPROM and finally light up all LED-s ?

Andrej

[Jerson]

your table could contain the lighting sequence which you want to produce

example
00011001 - light 3 leds
00100101 - light another 3 leds
11100011 - another pattern

Do this and fill your table with whatever you want.

Jerson

[andrej]

Thanks,

finally found time to complete this

[RussMartin]

His projects don't use a PIC, but you might take a look at:

http://www.hometown.aol.com/tractionfan/projects.htm

You can make a PIC emulate the twisted ring counter he uses, or do it with random number generation, all without EEPROM tables. If you want some code examples of both approaches, I can send them to you.