DIY dual concentric rotary switches

http://www.opencockpits.com/modules.php?name=Content&pa=showpage&pid=9

JDB.
[looking for a source for pre-built dual concentric rotary switches for an API500-sized project]

Hehe, awesome! :thumb: I can see you could also apply this to pot/switch combos aswell.

Is there an easy and repeatable way to correctly locate the centre of the shaft for drilling out for the shaft extensions?

oh that's good.

wonder if you can make duel gang pots in a similar fashion?

Excellent!

Just to be on the safe side

http://www.bourns.com/components.aspx?cmsphid=7631383|7163299|4907513

I have this idea that there may be a finite amount of time in the universe...
Kelly

I'm also not sure why I can't get this URL to post correctly, you'll have to paste in the last part :roll:

[quote author="Sleeper"]http://www.bourns.com/components.aspx?cmsphid=7631383|7163299|4907513[/quote]
Sure, they exist -- I believe Grayhill has a range of dual concentric switches too. As always, the trick is in getting them in DIY-quantities.

[quote author="Sleeper"]I'm also not sure why I can't get this URL to post correctly, you'll have to paste in the last part :roll:[/quote]
The forum software doesn't like links with dodgy characters such as '|'.

JDB.

Hi JDB,
yes of course the quantity can be a problem... here in the states I've ordered very small quantities of very obscure things from Allied and they could do it... sometimes.
it didn't always work.
I was interested in the link you sent...
I've tried to diy a dual pot and ended up having something useless.
Not that it was impossible, just that I didn't have the right parts on hand ...
I thought it would be a good idea to have an alternative in the same thread.
all the best
Kelly

That's so great. The last step is priceless:

9. WE ARE ARTISTS

But only if we now test that all works properly ;·)

Click to expand...

Hi JdB,

I guess these types just aren't small enough:
http://www.surplussales.com/Switches/SWSealed-2.html

Maybe at other pages...

Good Luck

[quote author="Gerald Jansen"]Hi JdB,

I guess these types just aren't small enough:
http://www.surplussales.com/Switches/SWSealed-2.html[/quote]
No, those are very nice; I'd found those too whilst Googling. The main downside for those is that it's apparently a (very) limited batch; for electromechanicals and other parts with low MBTF I prefer to use devices which have a good likelihood of still being available next year. I've had too many experiences like Pucho's lament in the Brewery, and for DIY I don't have the funds for a proper lifetime buy.

JD 'picky picky picky' B.

If you are into DIY a dual concentric switch then you can take the challenge of modifying Grayhill dual concentric ones as far as positions. Not easy but possible if you have a steady hand and good vision or a magnifyer.

I may be able to get 1 last batch of surplus Grayhills PCB mount. They are 2P2T or 2P3T from what I remember. I think there are 2 kinds in all. I can get a hold of about 100 of each if they are still available.

I sold about 50 a while ago on the Black market. It was such a pain to pack and ship I didn't buy the rest.

If you guys are interested in buying more than a few at a time I'll get them (I just don't want to ship hundreds of boxes of qty 1 or 2).

Jim