I want to be able to switch between ~3-5 inputs and only have the active ground/return connected at any given time. I know it would be easier to keep all grounds connected and simply switch the input wire, and I'll do that if this proves too complicated, but I wanted to give this a try.
As I understand, I should connect the ground wire first before connecting the signal. So the switch should go as follows:
State 1:
Signal 1 connected
Ground 1 connected
Signal 2 disconnected
Ground 2 disconnected
State 2:
Signal 1 connected
Ground 1 connected
Signal 2 disconnected
Ground 2 connected
State 3:
Signal 1 disconnected
Ground 1 disconnected
Signal 2 connected
Ground 2 connected
The trouble is, I don't know how to translate that into the specs on a switch. I assume I would need something with two decks, one for the signal and one for the ground, and have the ground deck shorting and the signal deck non-shorting?
As I understand, I should connect the ground wire first before connecting the signal. So the switch should go as follows:
State 1:
Signal 1 connected
Ground 1 connected
Signal 2 disconnected
Ground 2 disconnected
State 2:
Signal 1 connected
Ground 1 connected
Signal 2 disconnected
Ground 2 connected
State 3:
Signal 1 disconnected
Ground 1 disconnected
Signal 2 connected
Ground 2 connected
The trouble is, I don't know how to translate that into the specs on a switch. I assume I would need something with two decks, one for the signal and one for the ground, and have the ground deck shorting and the signal deck non-shorting?
I used a three deck 4 pole non-shorting rotary switch. I used one deck for the right channel, one deck for the left and used 2 of the three poles on the third deck for the grounds One pole for the left channel and one pole for the right.. Works a treat. No popping when switching and absolutely no crosstalk that is audible. I know it was overkill but it was what I found on Mouser. When I dig up the wiring diagram I'll post it.
Selector Switch
Selector Switch
So you would go from 100% input 1 to 100% input 2, with a brief period of no input, and input 2 would connect left/right/ground simultaneously? Glad to hear that works well. That gives me some confidence.
Yes. The guy I was relying on for help said there was no need for a MBB switch and it works fine.
Could you have used one deck, three position, three poll? One poll for L, one poll for R, and one poll for the grounds? Or four poll with separate grounds?
I'm trying to understand he switch topologies. Seems like you could use one deck/three poll, or three deck, one poll?
Absolutely could have done what you said. I was unclear what I was trying to do when I ordered the switch.
Actually I think you'd need a 4 deck one pole. or 1 deck 4 pole.
Right Positive - one deck or one pole
Left Positive - one deck or one pole
Right Ground - one deck or one pole
Left Ground - one deck or one pole.
I'm sure there are much more elegant methods to do this but I am a real novic
Actually I think you'd need a 4 deck one pole. or 1 deck 4 pole.
Right Positive - one deck or one pole
Left Positive - one deck or one pole
Right Ground - one deck or one pole
Left Ground - one deck or one pole.
I'm sure there are much more elegant methods to do this but I am a real novic
That makes sense. I would have done exactly what you did. I might try a one-deck-4-pole switch and see how it goes. Mouser is great about returns.
I just looked at Mouser for that and couldn't find a switch I could use. I wanted at least 4 or 5 positions.
This one looks like it would work: https://www.mouser.com/ProductDetail/Grayhill/56A30-01-4-03N?qs=ls7QRyWmRk7sI/2onIAkiQ==
Hello There!
I would like to build a preamp and I need to switch the inputs. At first I thought it will be a simple thing, but maybe I was wrong.
The question is, what do I want to switch?
a) To disconnect the signal with a series switch, or the signal to ground with a parallel switch?
b) To disconnect the signal and ground or only the signal?
c) What would I like to switch to? Relay, reed relay, analog switch IC, transistor etc.
Do you have any idea what can be help for me?
Thank you in advence
I would like to build a preamp and I need to switch the inputs. At first I thought it will be a simple thing, but maybe I was wrong.
The question is, what do I want to switch?
a) To disconnect the signal with a series switch, or the signal to ground with a parallel switch?
b) To disconnect the signal and ground or only the signal?
c) What would I like to switch to? Relay, reed relay, analog switch IC, transistor etc.
Do you have any idea what can be help for me?
Thank you in advence
Here is an example, ready to use.
https://www.ebay.com/itm/1443833130...vdvSVBLJ_t0QJdkuERy7RAX8YjbF21PUaAuawEALw_wcB
https://www.ebay.com/itm/1443833130...vdvSVBLJ_t0QJdkuERy7RAX8YjbF21PUaAuawEALw_wcB