Help, Need Mechanical/Electrical Flasher Circuit 120vac

Discussion in 'The Projects Forum' started by lgchristianson, Nov 1, 2006.

  1. lgchristianson

    Thread Starter New Member

    Nov 1, 2006
    3
    0
    Hi All,
    I know I should be able to do this in my sleep but certain brain cells appear to be on holiday.... may also be age related.

    I'm assembling a commercial control panel to operate two 3phase pumps with light and horn alarms. I have everything sized and designed for my needs but was unable to find a simple way to flash the LED lamp in my high/high circuit. I figure it'll need an "on" delay and an "off" delay relay but can't seem to get the logic right. The plan is to flash a light and sound a horn with a PB and latching relay to silence the horn but keep the light flashing until the level drops below the setpoint at which point it all resets. Damn timing relay logic is giving me fits. I don't have a lot of time to play as I'm also supervising the entire installation at the facility.

    I found a good source for the logic but no specifics here:

    http://www.allaboutcircuits.com/vol_4/chpt_5/3.html

    Anyone point me to a simple schematic somewhere?
    Thank,
    -Larry
     
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    4
    It'd probably be easier and cheaper to use a flasher relay instead.
     
  3. Spoggles

    Well-Known Member

    Dec 2, 2005
    67
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  4. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    The one connected directly to the mains depends on the coil in the bulb.
     
  5. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    I'm not sure how many other funtions your panel has (sensor inputs... pressure, temp, level etc for pump control) but it may simplify this to use a PLC, then the additional horn and flasher circuit would be a piece of cake.
     
  6. lgchristianson

    Thread Starter New Member

    Nov 1, 2006
    3
    0
    Thanks for the input...
    After posting this I did find a flasher that does just that, a "recycle flashing relay". I just didn't know what it was called! lol I was Googling all sorts of stuff but not that.
    Guess that's the route I'm taking.
    Thanks All,
    -L
     
  7. lgchristianson

    Thread Starter New Member

    Nov 1, 2006
    3
    0
    I thought about using a PLC but I don't believe the amount of input/outputs warrant it. All of it was pretty simple really but the timing logic was confusing to me. I have a problem with short term memory loss from an illness and that's one area that suffers.
     
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