Need help finding a mini tactile button that isn't momentary.

Discussion in 'General Off-Topic Chat' started by Devante, Jan 10, 2013.

  1. Devante
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    Member Devante Crescent fresh at best.

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    Hi guys.

    I basically want to connect and LED to a 2032 battery and have a mini-tact button press on/off for it.

    All the mini-tact buttons I find are "momentary," which means you have to hold them down for the light to come on and let go for it to turn off. I want it to be like a normal switch; press once for on, press again for off.

    Here's an example of the kind of small button I need: http://dx.com/p/td-85xu-mini-tact-switches-50-piece-pack-122514

    On a side note, I also need a 3mm semi-bright yellow LED. How exactly do I hook it up? I think I need a resistor in the line somewhere?

    Thanks guys!
     
  2. FAST6191

    Reporter FAST6191 Techromancer

    pip
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    I am not aware of much in the way of pushbutton mini tact that are not momentary (indeed closest you will probably get is http://www.digikey.com/scripts/dkse...&newproducts=0&ptm=0&fid=0&quantity=0&PV235=1 * or going slightly bigger with http://www.digikey.com/product-detail/en/ESB-30B102/P11164S-ND/354752 ), most people when looking for SMT type gear will tend to end up with a DIP switch, a slide switch or something very similar. I had a quick look to see if there was much in the rotary world (thinking SMT rotary encoder or variable) and there was not a lot that was small.

    *bonus for most of those however is they come with their own LED including options for either a bright white one or an amber one. Be careful if you do order one as you can still get momentary versions of those.

    A scan through of the LED pages of the same sites reveals quite a range of voltages and current draws so probably best to link up something like
    http://led.linear1.org/1led.wiz

    There is a temptation to ponder thyristors but I would slap my own self for taking that thought too far.
     
  3. Devante
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    Member Devante Crescent fresh at best.

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    I think these are exactly what I'm looking for. Maybe you can verify.
    http://www.digikey.com/product-detail/en/50-0015-00/519PB-ND/307997
    http://www.digikey.com/product-detail/en/40-4911-00/514PB-ND/523396

    Oh and look here: http://www.modeltrainsoftware.com/3v.html

    Looks like exactly what I'm looking for! I was even going to buy a 2032 holder.

    Wish that button was black but whatever. :P'

    Oh and by the way, are you saying a resistor is not needed?
    I didn't think so either, but everything I read says add one, even for a single LED.
     
  4. FAST6191

    Reporter FAST6191 Techromancer

    pip
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    How did I miss those earlier. Well serves me right for relying entirely on parametric searches.

    Yeah they (all three) look good, be warned digikey and most other retailers like them will sting you hard for shipping unless you are a business or school or buying more than about $50 worth of gear.

    Button being black- that looks like plastic and I figure permanent markers exist for a reason.

    Resistors- I linked up a calculator as things seemed a bit variable in the LED world and you did not appear to have any picked out. You can run certain LEDs under certain conditions without one but I would not advise it (indeed I usually go so far as to give each LED a resistor if I can) as they can still be burned out by accident.
     
  5. Devante
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    Member Devante Crescent fresh at best.

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    Good tip about the resistor.

    Oh and Sharpee has saved me many times and will many times again. ;>

    Thanks for replying.
    I always see you helping people out with great information about all types of topics.
     

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