SIO2SD wiring help

[djmat56]

Hi all. I have an SIO2SD device and am looking to mount it inside some sort of case. Now I will need to somehow wire some new buttons to be able to do this and solder them to the SIO2SD board but is it just as simple as wiring to the 2 small contacts in front of each button (see pic)? or would I use contacts above (s1, s2 etc)

 

 

[hendersonn]

You should be able to just solder your new switch to the lower pads (those smd caps up top could be destroyed if you linger your iron near it for too long). I'd test it by jumping them and comparing the results to it's normal operation first though, just to be sure.

Edited January 14, 2015 by hendersonn

[RodCastler]

It depends on your board. Try to get the schematics for it or measure with a multimeter.

Most likely those pushbuttons ground specific pins from the micro, and you will need to mimic that with your external switches. For that, you will need to solder your wire to the pin in the switch that is NOT grounded.

 

But again, that will depend on the specific design for your board. Which brand /model is it?

 

This shows what I did with the Lotharek model.

[hendersonn]

The pushbutton is already completing a circuit, you should be able to just solder to the same terminals as the existing one(s). A multimeter would be helpful in knowing the polarity, but generally speaking, switches don't care.

 

The only thing I always forget about these tactile switches is which legs are connected to each other. I think ,according to your picture, the left pair are connected to each other, and the right pair are connected. The button bridges them together when it is pressed (completing the circuit).