Hello everyone,
Does anybody know of a switch that is available that is able to perform the action shown in the attachment. Basically what i want to do is to be able to have a single switch to make or break multiple circuits.
If it needs to be 8 pole, try to find a 8PDT relay.
But 2 4PDT relays, controlled in parallel, would work too.
well technically i would need to control about 76 circuits. Could you propose options ? thank you
Is this one of those threads where we get the information a tiny piece at a time so that not until page 3 do we know what you actually want to do?
How about THIS ONE ? (Larry)
They are all pretty expensive. I am trying to find a cheap solution but so far the Jameco switch is the lowest price. You need 10 of the to get 80PDT SWITCH (four unused).
For $40 I don't think you can beat it.
Sorry for my ignorance. Ill ellaborate more,
I want to keep it short since i dont want to bore you with unnecessary details.
So from my attachment below - You can see basically i just need to short multiple (76) circuits from the resistance to the ground with the help of a single switch. so i am try to figure out a way how i am able to achieve this.
fieryfire:
Hello everyone,Does anybody know of a switch that is available that is able to perform the action shown in the attachment. Basically what i want to do is to be able to have a single switch to make or break multiple circuits.
Isn't this why people use rotary switches?
Paul
Isn't this why people use rotary switches?
No, it's not. People use rotary switches to make or break single circuits . (1 of 8 etc)
The OP wants to connect 76 circuits simultaneously or as close to that as possible.
So from my attachment below - You can see basically i just need to short multiple (76) circuits from the resistance to the ground with the help of a single switch. so i am try to figure out a way how i am able to achieve this.
You are not going to find a single switch with that many poles but you can use multiple analog switches or relays.
Ten of these would cost you close to $150
fieryfire:
Hello everyone,Does anybody know of a switch that is available that is able to perform the action shown in the attachment. Basically what i want to do is to be able to have a single switch to make or break multiple circuits.
Tell us exactly what circuits you want to switch, full details...
Tell us exactly what circuits you want to switch, full details...
SEE Reply #5
So from my attachment below - You can see basically i just need to short multiple (76) circuits from the resistance to the ground with the help of a single switch. so i am try to figure out a way how i am able to achieve this.
(see circled ends of unterminated resistors)
Application meets all the qualifying criteria for an analog switch.
I cannot believe you need mechanical switches. MOSFETs maybe? CMOS analogue switches?
I cannot believe you need mechanical switches. MOSFETs maybe? CMOS analogue switches?
He doesn't , but 76 alligator clips might take a while to connect...
raschemmel:
No, it's not. People use rotary switches to make or break single circuits . (1 of 8 etc)
The OP wants to connect 76 circuits simultaneously or as close to that as possible.
Baloney! I have seen rotary switches with multiple SPDP segments per wafer, perhaps 6 per wafer, and an unlimited number of wafers on a single shaft.
Paul
Baloney! I have seen rotary switches with multiple SPDP segments per wafer, perhaps 6 per wafer, and an unlimited number of wafers on a single shaft.
For clarification, the OP's application really only needs SPST contacts but he needs enough different combinations to add up to 76 (which factors to 2 2 & 19) so probably the logical solution would involve
10 8PST switches, relays or analog switchs, the last 4 of which would be unused.
I have not seen multiple spst switches on a single wafer but they might be available.
the most I have seen is 2-way, 6 pole. (you would need 13 of these to do 76 SPSTs)
Each wafer would have to have 8 commons and 8 contacts.
If 10 of these were combined on a single shaft that would be 80 SPST switches ,which meets the OP's
criteria.
I can't find anything like that in a rotary switch catalog but if I did I am sure it would cost more than
$40. (the cost of 1 Jameco push button 8PDT switches)
Each wafer would have to have 8 commons and 8 contacts.
If 10 of these were combined on a single shaft that would be 80 SPST switches ,which meets the OP's
criteria.
And an ENORMOUS great big lever to operate them all!
And an ENORMOUS great big lever to operate them all!
I don't think so. I have never worked with rotary switch equipment (old technology) but I have seen
rotary switches with multiple wafers. (in some Heathkits I think) and as I recall, the friction is not
so great that you need a large lever to rotate it. A regular 1 1/2" to 2" diameter knob would probably
be sufficient. I don't think a 1" diameter knob would have enough leverage to rotate 10 wafers.
Many years ago we were making various test boxes for customers and I was running out of rotary switches. I found an posting on Ebay for a rotary switch mfg. and repair kit and bought it. Is a large tool box full of containers filled with silver plated switch components to make almost any type of wafer switch for either fiber or ceramic rotary switch. All tools are included.
Of course, since buying the kit, I have never used it. But I just looked and it seems to have all the components to make the rotary switch the OP requires, and then some. looks like 6 SPST per wafer and there are some pretty long shafts in the kit.
Not volunteering to make the switch!
Paul
looks like 6 SPST per wafer
That's the most poles I have encountered.
You could sell the kit to the OP and let him hash it out , 
raschemmel:
That's the most poles I have encountered.
You could sell the kit to the OP and let him hash it out ,
Then we would both be happy and the OP would have something to do in the evenings!
Paul