[TriEmbed] Switching Switches

[Charles McClelland]

To any switch experts,

I have been looking for a small switch to turn on and off my low-power board (less than 100mA) and have not found anything great.  Part of the issue is that the terminology of switches is confusing: on-off, on-mom, off-(on), etc.  and some of it must be due to my last of skill in doing parametric searches on Digikey and Mouser.  I just know the switch I am looking for is out there but which of the tens of thousands is it?

I have been using this Single Pole Double Throw (SPDT) power switch from Sparkfun.  It works well but it takes up space and I only need a Single Pole Single Throw (SPST) variety.  Ideally, I could find a push-on, push-off switch which - I believe - is written on-off in the switch function terminology but I have yet to find a source in my Google searching that would confirm this.  

I found this switch after a long search but I am still not sure it is the one I need as it only says it is on-off (and not the more descriptive push-on, push-off) anywhere on the documentation or website.  Also, I am not sure if there is something else I am missing after Paul’s presentation where the switch had significant noise.  This should not be a big deal for a power switch as I have a couple capacitors on both sides of the power regulator - correct?

I am sweating these decisions because I need to make a number of these boards for a project with the City of Raleigh and I don’t want to screw it up.  If you have other suggestions within my component budget of $1.50 a piece, please let me know.  

Thanks,

Chip




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