Simulating motion with LEDs

Discussion in 'Homework Help' started by dave_is_sexy, Apr 25, 2005.

  1. dave_is_sexy

    Thread Starter New Member

    Jan 16, 2005
    Hi all. I'm also stuck on the following

    a row of 8 green LEDs (bi colour with RED).
    To start with, the last LED is red
    moving a rheosat will turn this green, and the 7th red
    continuing to move the rheostat will make the 6th red, and put the 7th back to green

    Currently I have a set of 16 comparators and 8 NAND gates and a heck of a lot of resistors and transistors to stop things blowing up. I feel certain there must be a standard circuit for this which is better than mine.

    Help much appreciated ^_^ xxxxxxxxxxxxxxx
  2. mozikluv

    AAC Fanatic!

    Jan 22, 2004

    you can do it with a CD4017. have the output ORwired with 1N4148.