bs2 candle

Jayguy5000

I read an article once about a bs2 and some LEDs making the appearance of the LEd's flickering as if it were a candle. where can I find a complete how-to for this project?

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Actually I think Im going to add the whiskers to my tank and let it roam, just need to figure out where.

xcqnudt

i think the book "what's a microprocessor?" can help u!

CCraig

I think there was a updated one, but I can't find it. The first one was a BS1 and is in Nuts & Volts # 126 on the download page.

You should also look at www.efx-tek.com/topics/wickled.html


HTH, Chris

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I'm not scared of your robot. I'm covered by Old Glory (youtube)

Post Edited (CCraig) : 7/15/2007 4:53:38 AM GMT

Forrest

Nuts & Volts #126 posted at Parallax has the updated schematic. This project is simple to build - I made it myself here http://forums.parallax.com/showthread.php?p=616628

TechnoRobbo

If you dont mind dedicating a BS2 solely to this task here's a code that works nicely.

Use an LED connected to Pin 0 in series with a 220 ohm resisor (or 470 if you want your battery to last longer). If you need to drive multiple LED's use some NPN transistors and a second voltage supply.

'·{$STAMP BS2}
' {$PBASIC 2.5}

Ramp· VAR Byte
speed VAR Byte
x···· VAR Byte
result VAR Word

DO
RANDOM result
RAMP=RESULT.HIGHBYTE MIN 64

RANDOM result
speed=RESULT.HIGHNIB· MIN 1

FOR x=32 TO ramp STEP speed
· PWM 0,x,5
NEXT

RANDOM result
speed=RESULT.HIGHNIB· MIN 1

FOR x=ramp TO 32 STEP speed
· PWM 0,x,1
NEXT


LOOP


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Have Fun


TR

Post Edited (TechnoRobbo) : 7/20/2007 1:59:08 AM GMT