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Electronics => Electronics => Topic started by: airman00 on November 27, 2008, 09:55:46 AM

Title: Thumbwheel pot with number
Post by: airman00 on November 27, 2008, 09:55:46 AM
Can anyone help me out finding a thumbwheel potentiometer with numbers on the top of it
(http://tbn1.google.com/images?q=tbn:IzbJp2cf7E9gwM:http://media.digikey.com/photos/Bourns%2520Photos/3352H%2520SERIES.jpg)

I wanna do something thats gonna look like this:
(http://tbn0.google.com/images?q=tbn:A4fwKnrV68FjuM:http://www.coinopgamemuseum.com/mechanisms/coincounter/incrementdetail.jpg)

I want to have three digit number selection - which means three thumbwheel potentiometers with numbers on them.Microcontroller does an A2D on the pot and translates that analog reading into what position the thumbwheel pot is turned to ( aka which number )
Title: Re: Thumbwheel pot with number
Post by: Soeren on November 27, 2008, 03:59:56 PM
Hi,

Why not just use Binary Thumbwheel Switches?
Title: Re: Thumbwheel pot with number
Post by: airman00 on November 27, 2008, 05:12:13 PM
Quote from: Soeren on November 27, 2008, 03:59:56 PM
Hi,
Why not just use Binary Thumbwheel Switches?
because I want 999 combinations and dont want that many binary switches :P
Title: Re: Thumbwheel pot with number
Post by: Soeren on November 27, 2008, 07:47:24 PM
Quote from: airman00 on November 27, 2008, 05:12:13 PM
Quote from: Soeren on November 27, 2008, 03:59:56 PM
Hi,
Why not just use Binary Thumbwheel Switches?
because I want 999 combinations and dont want that many binary switches :P
Plain old switches is not what I had in mind - didn't you ever heard of thumbwheel switches?
3 of them is all it takes (and in your case, go for BCD coded output rather than raw binary)

Well, a picture paints a thousand words, or in this case combinations, so here goes...
(http://img1.tradeget.com/integralsystems/NS629MXH1thumbwheelswitches.jpg)
Title: Re: Thumbwheel pot with number
Post by: airman00 on November 27, 2008, 08:14:03 PM
Oh I see now what you were referring to.
A thumbwheel pot would be easier to use and interface , but I guess if I cant find a thumbwheel pot I'll use a thumbwheel switch, Thanks for bringing it up.

Anyone know if thumbwheel pots even exist?
Title: Re: Thumbwheel pot with number
Post by: Trumpkin on November 27, 2008, 09:35:30 PM
I did quite a bit of searching for you. I found out at digikey if you search "pot thumbwheel"  P4C1502 through P4D2503 all have numbers on them!
Title: Re: Thumbwheel pot with number
Post by: airman00 on November 27, 2008, 10:06:40 PM
Quote from: Trumpkin on November 27, 2008, 09:35:30 PM
I did quite a bit of searching for you. I found out at digikey if you search "pot thumbwheel"  P4C1502 through P4D2503 all have numbers on them!
(http://media.digikey.com/photos/Panasonic%20Photos/THUMBWHEEL%20POT%20P4C,P4D.jpg)

Thanks but I wanted ones that can be read from the top and not from the side , pictures of which can be found in Soeren's post. They should look exactly like the ones in Soeren's post except be pots and not switches.