On Tuesday 07 March 2017 03:45:15 Chris Albertson wrote: > Today almost all user controls are "tactile switches" they are kind of > like micro switches that are soldered to a PCB and then there is a > larger piece of plastic that the user presses. All consumer > electronics is made this way, car radios, TV sets, computers even cell > phones. They come in different sizes but even the "large" ones are > tiny > Which gives me an idea. There are also large numbers of rubber buttons with a conductive elastomer that when pushed puts a low enough R across two adjacent traces, easily low enough to pull the normal logic 1 of an input pullup, close enough to ground to be a logic 0. With at least 40 kajillion of those around in car key fobs and tv remotes, I could cut a contact out of their pcbs, and use the button too. Or just buy the ready made. I have a counterbore in the face of the panel thats about 15.5mm's in diameter, and at least 4mm's deep, one is deeper because as usual, the 1/8" bit was walking out of the collet because those TTS holders aren't keyed, so they slip and limit the torque I can apply when tightening the collet nut. I do not have that problem if the bit is actually in an r8 chuck, but its unhandy to change too.
> Here is an example > https://www.amazon.com/microtivity-IM206-6x6x6mm-Tact-Switch/dp/B004RX >KWI6 Nice, and I can make them work, by making the pcb to hold them but even though I added another $35 worth of carbide tooling, they would only ship this item with my NEXT order over $25. I backed out and will find then elsewhere. As a lady friend of mine named JoAnn Dow would say, scrooooem. I'm going back to bed anyway. > They use these, I think because no one today would design a product > they requires hand soldering, The "tact switch" can be surface mounted > and soldered in a reflow oven. > > All I've seen are momentary contact and if a toggle is needed to do > that in the software that monitors the switch. > > A few months ago, knowing I wanted to make a pendent controller I > bought a bunch of different momentary connect push buttons from > different eBay vendors. The only way to find out if they are any > good is to buy them. So I bought from a half dozen different vendors > > BTW I thought all of the Radio Shack stored were closed and the > company was gone. I guess not yet. > > On Mon, Mar 6, 2017 at 2:39 PM, Gene Heskett <ghesk...@shentel.net> wrote: > > I bought what I thought were 3 momentary contact spst pushbutton at > > the Bridgeport shack Saturday. I opened the plastic bag to measure > > them and machine the holes in the apron to hold them Saturday night. > > > > Putting the thing back together slowly today, I wondered if my dvm > > could show me which end was which on the led in the button but at > > 1.7 volts, no, so I moved the probes to check the switch, pushed it > > once, goes to zero ohms and stays there until I push it again! No > > place on the bag does it say alternate action. And I don't care how > > gently you push it, no hint of an alternate action can be felt. > > > > And fleabay is no help, all are wrong mounting, everthing is nuts on > > the backside of the panel, without a long enough of a thread to work > > in a panel that despite the front being countersunk 5mm's, is still > > 8+mm's thick. Ditto digikey, Newark-Element14, and Mouser. And no > > one makes it easy to spec the desired diameter and mount. Somebody, > > and it sure isn't going to be me, could spend weeks finding a front > > of the panel, pushes into a 12mm hole to mount momentary contact > > switch. I am not about to sit and read 40,000 pdf's just to find out > > how big it is and how it mounts. I wouldn't mind a spring loaded to > > off toggle, but everything I tried recently needed an extra 2" on > > the handle to toggle it w/o cutting fingers on the bat handle. I've > > dealt with pushbutton toggles before and they have uniformly been a > > high rate of replacement items, the toggle gives up in <1000 pushes. > > > > Do I make brackets for minimicroswitches and machine my own buttons > > to push the rollers? > > > > The whole world is on backorder, and until its not, we are not going > > to make America Great again. > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > ------------------------------------------------------------ > > ------------------ > > Announcing the Oxford Dictionaries API! The API offers > > world-renowned dictionary content that is easy and intuitive to > > access. Sign up for an account today to start using our lexical data > > to power your apps and projects. Get started today and enter our > > developer competition. http://sdm.link/oxford > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! The API offers world-renowned dictionary content that is easy and intuitive to access. Sign up for an account today to start using our lexical data to power your apps and projects. Get started today and enter our developer competition. http://sdm.link/oxford _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
