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Optical Coin switch plans available at Oscar's...

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froggerman:

The circuit you have looks like a 'debounce' circuit. Did you just try using the coin switch as input to the 'debounce' circuit? The problems you are having with the coin switch to IPAC might just be because the IPAC is set to register much faster button presses than you need for the coin switch.

alank2:


--- Quote from: papaschtroumpf on March 18, 2004, 02:32:09 pm ---FYI, I use the following in my cab for coin detect: Optek OPB 490 series "11"  (about $1.25 a piece at my local electronic store).
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I looked at those, but couldn't find any that were wide enough I thought I could mount across the coin chute easily.  That is cool that they make ones that act like a switch.  I *really* wish I had a local electronics store that supplied such items!  Even with one of these, I would think you might need a timer or debounce circuit to make the pulse long enough for the keyboard encoder to detect--how does it work for yours?

Thanks,

Alan

alank2:


--- Quote from: froggerman on March 18, 2004, 04:21:37 pm ---The circuit you have looks like a 'debounce' circuit. Did you just try using the coin switch as input to the 'debounce' circuit? The problems you are having with the coin switch to IPAC might just be because the IPAC is set to register much faster button presses than you need for the coin switch.

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Yes, I looked at doing a debounce circuit too.  Once it was apparent that I was going to have to make a circuit, I figured why not go a little bit further and make it optical, and I thought I would get better detection without physically touching the coin.  I would think it is possible that a properly done debounce/timer circuit could work just as well.

Thanks!

Alan

ErikRuud:

Nice Job!

We use the same emitter/detectors to do timing on our slotcar tracks.  I have found that the emitters that Radio Shack sells seperately have a higher output rating and work better with 2"-3" seperation that we use on the track.

I have thought about doing an optical coin door a couple of times.  
I don't have a coindoor, and I might never have one, but if I did, it would be optical.

alank2:


--- Quote from: ErikRuud on March 19, 2004, 10:36:05 am ---I have found that the emitters that Radio Shack sells seperately have a higher output rating and work better with 2"-3" seperation that we use on the track.

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Yes, I saw that one too.  Is it capable of more current than the one in the matched set?  What current are you using in your slot track LED?  I'm surprised you need a more powerful one.  I am only allowing 0.37ma (VERY small) to my LED and the phototransistor picks it up easily.  The spec says the LED can go up to 150ma which seems insane to me, but that is the spec.

Thanks,

Alan


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