Would the linked code be good for using the onion d6t as a simple switch in a circuit?
First of all how about a link to "onion d6t". I assume you are not planning to use a d6t bulldozer on your program.
Weedpharma
Hi,
http://www.omron.com/ecb/products/pdf/en-d6t.pdf
Edit Sorry doesn't work for some reason. Attached file.
The link provided has some code on it, its an omron item, above is the link.
onion might be a translation problem.
Tom..... 
en-d6t.pdf (821 KB)
I gather from this abandoned thread, the OP wants to use detect people in a room.
I don't understand why an inexpensive PIR sensor isn't used. A PIR sensor could be used as a switch without the need of a microcontroller as wicko mentioned doing in this thread. The arduino was only added when he wanted to use two sensors (though I still the Arduino wasn't really needed).
Why a new thread? This sure seems like it's related to the previous thread. IMO, switching threads is disrespectful to the people attempting to help.
TomGeorge:
Hi,
http://www.omron.com/ecb/products/pdf/en-d6t.pdfEdit Sorry doesn't work for some reason. Attached file.
The insert a link button has put an extra "http://" into your link. You can see that if you hover over the link.
I sometimes have to edit any links in my posts multiple times to get them to work correctly.
TomGeorge:
Why a new thread? This sure seems like it's related to the previous thread. IMO, switching threads is disrespectful to the people attempting to help.
Well, he just as likely will not pursue answers on this one either. 