How to sort 3 terminals with push button switch?
Try to replace damaged membrane keypad with push swithes.... is it possible?
There are 3 terminal to short in order to work

 

Usually, control signals need to be pulled high or low. You can do this with transistors.

If this is not the case, use analog switches to connect the terminals.

 

Usually, control signals need to be pulled high or low. You can do this with transistors.

If this is not the case, use analog switches to connect the terminals.

 

I can not find a push buttons to sort 3 pins when pressed. When press one of 16 switches must 1-2-6 terminals to be sort, etc

 

I can not find a push buttons to sort 3 pins when pressed. When press one of 16 switches must 1-2-6 terminals to be sort, etc

You can take three push buttons and glue the caps together.

 

ok thanks thats make sense....

 

You can take three push buttons and glue the caps together.

You only need two. Can you find a DPST push button? That would do it.

 

Look for 3PDT momentary ON pushbutton.

https://www.ckswitches.com/media/1397/8020.pdf

 

Why do you need three switches? It seems quite simple to me short 3 terminals with two switches. Maybe we have a different understanding of what he is asking for.

Terminals A B & C

Switch 1 between A and B
Switch 2 between B and C.

 

Why do you need three switches? It seems quite simple to me short 3 terminals with two switches. Maybe we have a different understanding of what he is asking for.

Terminals A B & C

Switch 1 between A and B
Switch 2 between B and C.

You're right. I didn't think of that. All you need is a DPST or DPDT pushbutton.

 

However, I am doubtful that a membrane keypad is actually doing that. Don’t see why it would use more than two terminals.

TS: Are you sure two of the terminals on your keypad keys are not already shorted together?

 

However, I am doubtful that a membrane keypad is actually doing that. Don’t see why it would use more than two terminals.

TS: Are you sure two of the terminals on your keypad keys are not already shorted together?

Yes. The information provided by TS is lacking, again typical of the X-Y problem. But I did not bother to pursue it.

 

Yes. The information provided by TS is lacking, again typical of the X-Y problem. But I did not bother to pursue it.

here is the chart:
1-2-6
1-2-7
1-2-8
1-2-9
1-3-6
1-3-7
1-3-8
1-3-9
1-4-6
1-4-7
1-4-8
1-4-9
1-5-6
1-5-7
1-5-8
1-5-9
its seems all connected to common #1
how to to that with 1 push button swhich?

 

However, I am doubtful that a membrane keypad is actually doing that. Don’t see why it would use more than two terminals.

TS: Are you sure two of the terminals on your keypad keys are not already shorted together?

yes #1 and #10 are sort together. How to sort 1,2,5? or 1,3,5, etc