How to change multiple parts in circuit using one toggle switch?

[walnutzh]

How to change multiple parts in circuit using one toggle switch?
I mean if I wanna change some capacitors and resistors at the same time, is it possible using only one toggle switch to do that?

[Ripthorn]

The easiest way is to have the toggle switch controlling the power to multiple relays to get enough switching power. I did this in an amp one time where I was using a single switch to switch between plexi and JCM800 preamps.

[antonis]

It depends on items configuration..

[walnutzh]

The easiest way is to have the toggle switch controlling the power to multiple relays to get enough switching power. I did this in an amp one time where I was using a single switch to switch between plexi and JCM800 preamps.

I think your plexi and JCM800 preamps are two different unit with no sharing parts?

What I ask is to switch multiple parts in one circuit board(and other parts remain the same) 

[GibsonGM]

Yes, this often can be done. Can you show us with a drawing or good description what it is you would like to switch?  What kind of switch you would need depends on what you want to switch...

[walnutzh]

Yes, this often can be done. Can you show us with a drawing or good description what it is you would like to switch?  What kind of switch you would need depends on what you want to switch...

I was wondering how JHS Bonsai works... this pedal can change to multiple versions of the same circuit(Tube Screamer) using a rotary switch. I think this could be done with multiple layer PCB? but that seems to be too complicated...

I mean different versions share most parts and only a few capacitors or resistors are changed.. so it better reuse the unchanged parts for different modes right?

[teemuk]

I think it would be easier to help you if we knew what you are actually trying to achieve.

For this moment the answer to your question is: Yes, in some cases.

As said, the easiest method is to harness that single switch to control several other switches like relays, LDRs or semiconductors. Otherwise only in some rare cases can just a single switch be used to switch multiple circuit parts. But, for exsmple, if you only need an on/off type toggle, and every circuit or component you switch shunts to ground (e.g. gain stage + shunt clipping diodes + lo-pass cap) then you can switch all of them with a single switch.

[walnutzh]

I think it would be easier to help you if we knew what you are actually trying to achieve.

For this moment the answer to your question is: Yes, in some cases.

As said, the easiest method is to harness that single switch to control several other switches like relays, LDRs or semiconductors. Otherwise only in some rare cases can just a single switch be used to switch multiple circuit parts. But, for exsmple, if you only need an on/off type toggle, and every circuit or component you switch shunts to ground (e.g. gain stage + shunt clipping diodes + lo-pass cap) then you can switch all of them with a single switch.

hey, I just post above 

[theehman]

If it's just a few parts you can get toggle switches that have 4 poles.

[teemuk]

I'm not familiar with inner workings of JHS but e.g. Turbo Tube Screamer just uses a 2P4T rotary switch to select between four operating modes and associated components. That's like two rotary switches in one, each with four routing options. Want more options, add more throws or poles.

(Turbo Screamer uses one half of the switch to select between four different clipping diode arrangements and another half to select between gain/response. Schematic will show that it's actually a very simple setup).

Of course one can't achieve everything with that but I have a hunch JHS night not be far away from such setup. Many modern designs also replace a rotary switch with an encoder and switching logic. Outside you can't tell the difference.

[r080]

The JHS Bonsai might be a little complicated as far as a place to start. Yes, it uses a multiple throw rotary switch to set modes, but it also has a microcontroller and 7 quad spst analog switches.

A good simple example is the Fulltone Fulldrive 2 switch for vintage/flat mid/comp cut. It uses an on/off/on DPDT.

http://1.bp.blogspot.com/-6Jl-1PWqSDU/VYplag3p2qI/AAAAAAAAAZc/78LbbwXLxLQ/s1600/fulldrive.BMP

[Vivek]

Would Analog mux switches help in your situation ?

[amptramp]

For some situations, it is better to switch outputs (and maybe inputs if the input impedance is low) of identical circuits with the different components installed.  What you add in the complexity of having multiple copies of a given circuit is save in the number of poles you need.

[walnutzh]

The JHS Bonsai might be a little complicated as far as a place to start. Yes, it uses a multiple throw rotary switch to set modes, but it also has a microcontroller and 7 quad spst analog switches.

A good simple example is the Fulltone Fulldrive 2 switch for vintage/flat mid/comp cut. It uses an on/off/on DPDT.

http://1.bp.blogspot.com/-6Jl-1PWqSDU/VYplag3p2qI/AAAAAAAAAZc/78LbbwXLxLQ/s1600/fulldrive.BMP

wow this is informative! Using a microcontroller to switch 7 quad spst switches sounds both complicated and brilliant... thanks for that info

[walnutzh]

For some situations, it is better to switch outputs (and maybe inputs if the input impedance is low) of identical circuits with the different components installed.  What you add in the complexity of having multiple copies of a given circuit is save in the number of poles you need.

In this case the amount of parts sit in one circuit board must be huge... and the cost is high too... but yeah I think it's a solution maybe for say 2 version in one style pedal.

[Lizardmn]

I was wondering how JHS Bonsai works... this pedal can change to multiple versions of the same circuit(Tube Screamer) using a rotary switch. I think this could be done with multiple layer PCB? but that seems to be too complicated...

I mean different versions share most parts and only a few capacitors or resistors are changed.. so it better reuse the unchanged parts for different modes right?

From what I can tell of a gutshot from the Bonsai off of google, it seems to be what amptramp was talking about. I think it has 9 whole circuits in there (using surface mount components keeping everything nice and tiny) and switching between the ins/outs rather than say swapping the two resistors at the end to go between 808 and ts9.

What you add in the complexity of having multiple copies of a given circuit is save in the number of poles you need.

[walnutzh]

I was wondering how JHS Bonsai works... this pedal can change to multiple versions of the same circuit(Tube Screamer) using a rotary switch. I think this could be done with multiple layer PCB? but that seems to be too complicated...

I mean different versions share most parts and only a few capacitors or resistors are changed.. so it better reuse the unchanged parts for different modes right?

From what I can tell of a gutshot from the Bonsai off of google, it seems to be what amptramp was talking about. I think it has 9 whole circuits in there (using surface mount components keeping everything nice and tiny) and switching between the ins/outs rather than say swapping the two resistors at the end to go between 808 and ts9.

What you add in the complexity of having multiple copies of a given circuit is save in the number of poles you need.

I kinda doubt this solution is practical for 9 completely circuits...

[Lizardmn]

Full disclosure, I don't know for a fact that's what's going on here

https://image.ibb.co/kmDKLq/ADAEB332-82-E1-4356-BDDC-E4145-FF92902.jpg

Since there's only the one set of diodes it could well be switching individual components in and out, but either way its beyond the scope of my brain.
I can only assume the chips are doing the bulk of the work, which you wouldn't be able to replicate with a hardware switch unless you had like a million poles to work with.

[r080]

I took a closer look. There are 2 4558 chips, 1 single precision opamp, 1 24 pin chip I can't make out, and only 6 quad analog SPST switches.

I might have misunderstood the OP. Walnutzh, are you just wondering about this JHS pedal, or do you have something you are working on that you want to do?

[r080]

I am going to keep going, because I think it is interesting.

We have 9 modes and 24 SPST switches. I assume you would need 2 of the switches to go between the 4558s. That would let you connect 22 components wherever you want them with the rest of the switches. That should be more than enough to get 9 slightly different modes.

In the end, I am betting the analog switches end up being cheaper than some other options:

http://beavisaudio.com/projects/screamerlab/