Racing start lights ( like F1 tracks)

Jun 30, 2005 2 Replies
M

Hello, i would like to know if someone has a link to a circuits to create starting lights for races ? I would like it to turn on 5 red LEDs one at a time without turning off the other till the 5 are on. Then turn them off altogether. and to be nicer. would love it to light



5 green LED's as soon as the reds turn off,

Thanx for the help


This is how i would like it to look like a . is for lights off a R is for red light on ang G is for green lights on:



at start



..... .....


1 sec later

R.... .....


1 sec later

RR... .....


1 sec later

RRR.. .....


1 sec later

RRRR. .....


1 sec later

RRRRR .....


1 sec later

..... GGGGG



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C

Good morning. This is one of those jobs that pretty much cries out for a $2 18-pin PIC. This is one of them. But I'd guess you'll want to be doing this with discrete logic. It's not that difficult (view in fixed font or M$ Notepad):

` Lightbar Clock ` VCC VCC ` + + ` | | .------------CLK ` .-. | LM555 | ` 470K| | | | ` | | .--o6 | VCC ` '-' | | | + ` | | | | | ` o--o--o2 | --- .01uF ` +| | 1 5 | --- ` --- '---o----o----' | RST ` 1uF--- | N.C. o--->

` | | | ` | | .-. ` === === | |47K ` GND GND | | ` '-' ` | ` === ` GND

` Lightbar Logic 2 VCC VCC ` VCC __ + + ` + .------. .------------------| \\ ___ ~~ | | ` | | | | |00 )o-|___|-|

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