Quick question. (I should know this, but I don't)

[haveyouseenhim]

I'm working on a layout with off-board switches and one of them is a DPDT. are switch lugs numbered like the lugs of an IC? It seems like something super basic that I should know     Which way is the standard way to number switches?


    1   6
    2   5
    3   4

or

    1   4
    2   5
    3   6

or

    1   2
    3   4
    5   6

[armdnrdy]

It would be the second one down.

2 and 5 are the common and 1 and 4 seem to be on the same side. Sometimes I see them in drawings as 1,2,3 A and 1,2,3, B with 2 always being then common.

Here's something that might help.

https://www.nkkswitches.com/pdf/switch%20basics_web08.pdf

[haveyouseenhim]

Awesome   thanks... The PDF was very useful.

[armdnrdy]

You welcome.

I stockpile basic info like that because my memory is a bit strange sometimes.

I can remember complicated things that I learned a week ago or years ago, but something basic like LED polarity....I have to look up every time!! Crazy!!

I know..I know...the little flag....but is it the anode or the cathode?

And I can't tell you how many times I've metered switches! But, it's better to do it right the first time!

[R.G.]

Sorry to complicate things for you.

I've seen switches with manufacturers numbering pins in all three ways.

Get the datasheet or use a meter are the only two sure ways. The datasheet is what the manufacturer thought he did. The meter tells you what he really did.

[haveyouseenhim]

Sorry to complicate things for you.

I've seen switches with manufacturers numbering pins in all three ways.

Get the datasheet or use a meter are the only two sure ways. The datasheet is what the manufacturer thought he did. The meter tells you what he really did.

I know how the switch is set up.  My confusion was that the layout has wires labeled: to sw5, to sw2, to sw3  etc.   

thanks though

[Ronan]

Therefore you need a schematic, which would be nice if it was posted with the layout.

[haveyouseenhim]

Therefore you need a schematic, which would be nice if it was posted with the layout.

I didnt realize the schemy was posted with the layout. When i found the layout it was on google images from sabrotone. I looked at the site and the schemy was with it.

Thanks Ian     It's always something simple/common sense when I have a problem

[Pyr0]

You should have just checked on Haralds site, he always does numbering for his layouts like this

http://www.sabrotone.com/wp-content/uploads/2011/03/3pdt_numbering.jpg