Sequencial circuit help

Discussion in 'The Projects Forum' started by wdkh68, Jun 23, 2010.

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  1. wdkh68

    Thread Starter New Member

    Jan 12, 2010
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    Please look at the attached circuit and see if you can find anything wrong. The first LED's 1-17 should sequence followed by LED's 18-22 with each one fading off in about 3 seconds, and then starting over after LED 22 fades off. I have breadboarded this, but only hooked up Led,s #18 &19 circuit, so, I hooked up pin 15 (res) of IC2 to pin 7 of IC4. The first 9 do not light and 10-17 only light and sequence when I touch the metal base on my breadboard (crazy huh). I have checked the wiring and have swapped out IC's to no effect.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    Don't know what app reads that file type. Can you post it as a more common image file, like a PNG?
     
  3. wdkh68

    Thread Starter New Member

    Jan 12, 2010
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    When I click on the above attached file, it brings the schmatic up. When posting a new thread, below in the attachment list, it has sch. as one of the approved forms, so I don't know why it won't come up for you. I'll try another file.
     
  4. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    .sch is an approved format so you can share it with those who use the same program as you.

    You need to do a print screen, open paint, paste then save as .png format. Then all can see what you want us to see.
     
    wdkh68 likes this.
  5. beenthere

    Retired Moderator

    Apr 20, 2004
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