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looking for nice blue backlit pushbuttons

Discussion in 'Hobby Electronics' started by Heywood Jablome, Apr 17, 2005.

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  1. Went to dickies and jaycar but couldnt find anything I liked. I'll need
    about 100 to start with so they need to be at the right price. Backlight
    doesnt have to be blue but just something nice. Glass top would be
    excellent. A good tactile feel - with good positive click action. Sorry to
    be so picky but its for my future house as wall switches mounted on a blank
    plate connected to a low voltage controller which I am building. Just simple
    momentary action single pole. Any help appreciated in finding a quality
    supplier. The stuff at shops these days is so cheap.

    I like the look of the round saturn switches that the Cbus2 home automation
    lighting system has but I dont want the associated circuitry. Just the
  2. Caliban

    Caliban Guest

  3. Chris

    Chris Guest

    1. Are you looking at 100 of these for just one house?
    2. How many switches per plate?
    3. Do you wish to use these for dimming or will your controller do that?

  4. 1. Are you looking at 100 of these for just one house?
    On each plate I am thinking one button for on, one for off and 5 for
    presets. Thats 7 switches per plate.

    The house will no doubt have 15 to 20 switch plates so ill need around 100
    individual switches.

    The controller will do that. The switches should all be single position
    momentary pushbutton with a backlight LED.
  5. Mike Diack

    Mike Diack Guest

    Since you already have an MCU in the equation, sounds like an ideal
    application for a QPROX chip.
    They work great !
  6. Chris

    Chris Guest

    Short of taking a trip to Akihabara you are possibly best off contacting
    Clipsal and asking to see a rep in your area. See if you can purchase the
    Cbus plates/buttons without the circuitry. They are in my opinion the best
    looking switches available in the world. The other suggestion I was going to
    make was the Quantum proximity chips that Mike has already suggested with
    etched or coloured glass. Design a PCB to sit behind it with the QT chips
    and blue and orange leds for indicators - just like Clipsal's. However, with
    so many buttons to a single plate, you may be switching the wrong circuit.
    As well, I have found by experience that the more switches per plate the
    more confusion for users. Seriously consider labelling. What about a short
    touch for on and a longer touch for off - instead of 1 button for each.

    I would be interested to see what you end up using and what type of
    controllers you are using. Other oz manufacturers are Dynalite (the best and
    most flexible system around), HPM (I think they are still into it) and there
    is a crowd in your home town (Melb?) that is into home automation with their
    own gear but I can't remember their name.

  7. Since you already have an MCU in the equation, sounds like an ideal
    Wow, I have seen them on mini Ipods but had not considered them for this
    application. This looks really really cool. Especially for this application.
    Have you used the development board? The linear one looks like just the
    ticket. Hoping its not too pricey.
  8. Mike Diack

    Mike Diack Guest

    I didn't use the dev board, the app notes go into the layout issues very
    well so I made a board that fitted my application (in the back of a
    Clipsal/PDL flushplate) and it just went, no problems. Braemac sell them
    in user friendly MOQs (1 tube) and they aren't too pricey (IIRC around $5
    for the single buttons and $10 for the 6 button chips). You gotta be a
    wee bit careful with backlight LED switching glitches otherwise you can
    get into a tail chasing scenario, but they go into that in the appnotes.
    I have a sneaky suspicion that they really are mask PICs.
  9. dmm

    dmm Guest

    Those chips look cool. Farnell have got a range (QT-150 in SMD and PDIP for $8.27)
    in stock.

    I think I'll have a play with some of them... :cool:
  10. Mike Diack

    Mike Diack Guest

    They have HUGE play potential !
    My last app involved a giant blue rubber jellyfish that screamed "OUCH!!!"
    when the (museum) punters touched the tentacles.
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