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Does this switch wiring work for what I want?
Posted: 26 Nov 2016, 19:12
by JakeAC5253
I want to break a signal path which has no discrete components in it as of now. I want a 3 position toggle switch to have the options of Stock (signal pass through), Resistor 1 (signal path broken and routed into Resistor 1), and Resistor 2 (signal path broken and routed into Resistor 2). I've been pondering this, but I think I have figured out how to do it. Can anyone look this over and see if this looks correct? The switch is an ON-ON-ON DP3T switch. Forgive the sloppy Paint work, I'm a mechanic, not an artist
Re: Does this switch wiring work for what I want?
Posted: 26 Nov 2016, 19:19
by JakeAC5253
Actually, I think I just corrected my own design. Try this one.
Actually I don't think this one works either. Maybe both jumpers combined? Now I've got myself confused...
Re: Does this switch wiring work for what I want?
Posted: 27 Nov 2016, 07:37
by oldrenegade
I believe a on-on-on toggle switch works as so.
Re: Does this switch wiring work for what I want?
Posted: 27 Nov 2016, 09:51
by deltafred
I've never seen a 3 position toggle switch with 8 connections (but they may exist). I have seen plenty as shown by oldrenegade.
To get your required combinations you would connect it as follows.
Input to pin 2
output to pin 5
Link 3, 4
R1 between 1,4
R2 between 3,6
This would give
on [on] on - signal straight through
[on] on on - R1 in series with signal
on on [on] - R2 in series with signal
Re: Does this switch wiring work for what I want?
Posted: 27 Nov 2016, 15:05
by JakeAC5253
Interesting. I did a google search of a DP3T switch, and it came up with this result.
That's the assumption I was coming from. You've obviously solved the issue though using that switch style. Now is that considered an ON-ON-ON DPDT, or is that in fact what a DP3T is? I haven't found much documentation about these types of uncommon switches that go beyond basic two position SPDT and any variation thereof with more poles. The uncommon ones being DP3T, or 4P3T etc.
Re: Does this switch wiring work for what I want?
Posted: 27 Nov 2016, 21:53
by deltafred
JakeAC5253 wrote:Now is that considered an ON-ON-ON DPDT, or is that in fact what a DP3T is?
Yes, you are right, that is a DPDT on-on-on, the one you showed is one form of DP3T but as I said I haven't seen a toggle switch like that.
Re: Does this switch wiring work for what I want?
Posted: 28 Nov 2016, 04:30
by JakeAC5253
deltafred wrote:JakeAC5253 wrote:Now is that considered an ON-ON-ON DPDT, or is that in fact what a DP3T is?
Yes, you are right, that is a DPDT on-on-on, the one you showed is one form of DP3T but as I said I haven't seen a toggle switch like that.
Awesome, thanks a lot for the help man!
Re: Does this switch wiring work for what I want?
Posted: 28 Nov 2016, 17:28
by Dirk_Hendrik
deltafred wrote:JakeAC5253 wrote:Now is that considered an ON-ON-ON DPDT, or is that in fact what a DP3T is?
Yes, you are right, that is a DPDT on-on-on, the one you showed is one form of DP3T but as I said I haven't seen a toggle switch like that.
Neither have I. If one can find a switch in that functionality it's a slide switch disguised as a toggle.
Ontopic.
The usual 3 position toggles are On-off-On where the center contact(s) do not make a connection to the outer contact when in the middle position. When the application allows to change order from resitor-short-resistor to short-resistor-resistor a on-off-on switch will work like a charm. One outer position will be the short. The center position will be the highest resistor value required. The last position will be that "highest value" in parallel with a resistor that together creates the value for the lower required resistor value.
And the switch will probably be cheaper and less chunky
