a simple switch that is hard to find , help needed please

Thread Starter

HaventgotaClue

Joined Aug 8, 2012
17
A simple switch and can i find one ? nope scanned the internet checked localy and doesnt seem anyone makes one .. which is stupid surely ?

So the switch i need for a project . is a simple 3 position round flicj switch to put on a control panel .

ie,

OFF
on 1 speed
on 2nd speed

12v 4 amps .. not rocket science is it ? but you try getting one. the cars now days dont have the old off or 1 speed or 2nd speed wiper or fan buttons no more there all on the indicator stalks or the round 4 positions etc,so seems the world doesnt need them ?

anyone tell me where i can get one ? mail order from anywhere ?
 

ErnieM

Joined Apr 24, 2011
8,377
I know EXACTLY what you are looking for: It is called an ON/ON/ON switch. They are not commonly known about but ever since I learned about them decades ago I get excited each time I find a place to use them.


Stocked by Digikey and others.

Here's why they are special: A conventional DPDT switch has 6 terminals on the bottom, the central terminal connects to the end terminal when the paddle points to the opposite side, and no matter how many poles there are all the sets of terminals switch the same way. They come in an ON-ON style (ie, no center position) or an ON-OFF-ON style where the center position is OFF for all connections.

Now an ON-ON-ON switch has a useful pattern to how the terminals connect:



Notice how the center position skews the connections.

I'll leave it as a puzzle to see who comes up with how to wire these for a 3 position switch.
 

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BSomer

Joined Dec 28, 2011
434
Or perhaps this one would work...
http://www.digikey.com/product-detail/en/2GG51-73/2GG51-73-ND/1007245

The problem is that the datasheet doesn't show too much information on how it connects the pins. It just says that it is a "ON-ON-OFF" type and that position 1 is 2 circuit on, position 2 is 1 circuit on, and position 3 is off. Check it out and see.
 

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Thread Starter

HaventgotaClue

Joined Aug 8, 2012
17

Thread Starter

HaventgotaClue

Joined Aug 8, 2012
17
Or perhaps this one would work...
http://www.digikey.com/product-detail/en/2GG51-73/2GG51-73-ND/1007245

The problem is that the datasheet doesn't show too much information on how it connects the pins. It just says that it is a "ON-ON-OFF" type and that position 1 is 2 circuit on, position 2 is 1 circuit on, and position 3 is off. Check it out and see.
Now this is most promising and could do the job .. now getting them is the next step ? well done for finding.
 

BSomer

Joined Dec 28, 2011
434
I think the reason it was coming up that way for me is because I am here in the US, could be wrong though. There were other sources listed for that specific part number at http://www.findchips.com/ ... That website searches various suppliers for the part number you put in the search bar. You have to have a good part number though and they don't search every supplier out there, mainly the big names.
 

MrChips

Joined Oct 2, 2009
30,824
Lots to choose from, starting at £1.04 from Radio Spares:

http://uk.rs-online.com/web/c/switches/rotary-switches-accessories/rotary-switches/


Sorted by price:

http://uk.rs-online.com/web/c/switches/rotary-switches-accessories/rotary-switches/?sort-by=P_breakPrice1&sort-order=asc&view-type=List&sort-option=Price

Most rotary switches come with many positions, e.g. up to twelve.
There is a metal tab that you bend up to make it stop at the max position that you desire.
To switch two separate lines such as power and speed you will need a double-pole (DP) switch.


Sorry, you asked for 4A. I'll keep looking.

EDIT:

Here is a 3-position toggle switch rated at 5A @ 28V

http://uk.rs-online.com/web/p/toggle-switches/7109876/

Identical to the one Ernie showed on post #6

Here are some more:

http://uk.rs-online.com/web/p/toggle-switches/7109674/

http://uk.rs-online.com/web/p/toggle-switches/7109845/
 
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