| elfman222 |
I know this is the stupidest question ever, but on switches that have 3 leads, what is the 3rd for? which is which?
thanks. |
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| li_gangyi |
| It'll depend on how u wire it..there's a NO and a NC contact (Normally Closed and Normally Open) It'll work "the other way" if you wire it incorrectly...check with a multimeter when in doubt... |
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| elfman222 |
| Thanks.... now to find my multimeter:D :confused: |
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| GregGC |
| quote: | Originally posted by elfman222
I know this is the stupidest question ever, but on switches that have 3 leads, what is the 3rd for? which is which?
thanks. |
An example: |
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| li_gangyi |
| that would be when u wanna have a "selector" switch...to switch between the first and second...for a power switch...just a pair of connectors (Middle and one of either side) will do...just nake sure you orientate the switch right... |
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| Circlotron |
| You could use the switch to do an immediate A/B comparison of a "burnt in" vs a "not burnt in" power cord and and find out that there is no difference at all. ;) |
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| 2Bak |
| GregGC, on you schematic what is the function of R1 and C1? |
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| theChris |
| it is an RC lowpass filter. off the top of my head i would assume it is to remove radio-frequency interferance from the source. |
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| theChris |
| quote: | Originally posted by Circlotron
You could use the switch to do an immediate A/B comparison of a "burnt in" vs a "not burnt in" power cord and and find out that there is no difference at all. ;) |
you're just not wearing the right color shirt. not rocket science here. :clown: |
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| macboy |
To get technical, a switch with 3 connectors is called "dual throw". With this type of switch, the centre connector is connected to either of the other two, depending on where the switch is set. There may also be a center "off" position, where the center connector is not connected to either one. This switch may be referred to as "SPDT" (Single Pole, Dual Throw).
A switch can also have more than one "pole". Think of it as two (or more) separate switches internally that are all activated by the same rocker/lever. Such a switch may be called DPDT (Dual Pole, Dual Throw) and in this case has 6 connections. |
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| don ward |
| I dont think its a stupid question, it isnt wrong to ask basic questions in an area you arent an expert in.? dw |
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