Help need Flash at peak voltage

Discussion in 'The Projects Forum' started by RossAnthony, Jan 26, 2011.

  1. RossAnthony

    Thread Starter New Member

    Jan 10, 2011
    2
    0
    Hi

    I need to build a circuit that ramps up to peak voltage stay there for five seconds and then ramps down, by connecting the output to leds it will cause the leds to brighten flash for five seconds and then
    I found this circuit online and after adding a few components, I got it to suit my needs of the voltages ramping up and down so that the led brightens and dims, I now need to add a flash to the circuit, what i have tried doing is adding a 555 timer in the astable mode that pulses for five seconds and then turns of for five seconds. My problem is though when I hook up the 555 to the circuit it negates the dimming and the brightening. Any help would be greatly appreciated
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    Actually I've come up with several ideas on the subject, you can read them at LEDs, 555s, Flashers, and Light Chasers.

    Word is not a good medium for images here, people do not like to open unknown files. You can load attachments and display them large like this....

    [​IMG]

    or you can use the local albums AAC has as part of the service.

    Read my link, then get back with this thread. I think we can get you there.
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
  4. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    Gone again.
     
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