Touch Switch

[Tom Hubin]

Hello,

I am looking for a small component or circuit to make a touch switch of
an aluminum shell. Circuitry inside the shell would only be active while
somebody is touching the shell. When not touched I need minimal battery
drainage.

Tom Hubin
[email protected]

 

[[email protected]]

I am looking for a small component or circuit to make a touch switch

www.digikey.com and search for "427-1099-2-ND"

DigiKey sells a single-IC solution to this, from Quantum research
group.
Look at QT118 for a low-power part. They work pretty well. From
a human factors point of view, you can do two interesting things:


(1) make a pushbutton that apes/felony inmates/severe abuse cannot kill

(2) make a pushbutton no one knows is there