Arduino XBee Project: Silent Laser Tripwire Doorbell/products/arduino/b/blog/posts/arduino-xbee-project-silent-laser-tripwire-doorbellDoorbells are the 20th century version of today&#39;s perpetually-interrupting cell phone. There you are, cooking a delicious dinner or reading a nice book when the doorbell rudely goes off in your ear. Sure, you&#39;re glad to see whoever is at the ...en-USTelligent Community 12RE: Arduino XBee Project: Silent Laser Tripwire Doorbellhttps://community.element14.com/products/arduino/b/blog/posts/arduino-xbee-project-silent-laser-tripwire-doorbellSun, 25 Feb 2018 15:11:04 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:014c9264-92a0-45fd-8ce6-77b46c6f768fmodeduck0<p>What an amazing detailed video-clip. Thank you for expanding my knowledge base. I really love it.</p><p>David<br />Writer of <a class="jive-link-external-small" href="https://doorbellgears.com/" rel="nofollow ugc noopener" target="_blank">Best Doorbell</a></p><img src="https://community.element14.com/aggbug?PostID=17843&AppID=145&AppType=Weblog&ContentType=0" width="1" height="1">RE: Arduino XBee Project: Silent Laser Tripwire Doorbellhttps://community.element14.com/products/arduino/b/blog/posts/arduino-xbee-project-silent-laser-tripwire-doorbellSat, 07 Jun 2014 10:35:27 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:014c9264-92a0-45fd-8ce6-77b46c6f768fterrydark0<p>Cheapest at Newark, as far as I can tell, is approx $59.&nbsp; Adafruit stock one at $5.95, at <a class="jive-link-external-small" href="https://www.adafruit.com/product/1054" rel="nofollow ugc noopener" target="_blank" title="https://www.adafruit.com/product/1054">https://www.adafruit.com/product/1054</a>, but I am sure you could it cheaper if you looked at other sites.</p><p>&nbsp;</p><p>Terry</p><img src="https://community.element14.com/aggbug?PostID=17843&AppID=145&AppType=Weblog&ContentType=0" width="1" height="1">RE: Arduino XBee Project: Silent Laser Tripwire Doorbellhttps://community.element14.com/products/arduino/b/blog/posts/arduino-xbee-project-silent-laser-tripwire-doorbellFri, 06 Jun 2014 19:16:43 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:014c9264-92a0-45fd-8ce6-77b46c6f768fDAB1<p>Hi Dave,</p><p>&nbsp;</p><p>Nice project.&nbsp; I may have to look into doing a project like this as I just recently lost my last four-footed door monitor.</p><p>&nbsp;</p><p>Did you consider a passive PIR sensor instead of the laser line break?</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=17843&AppID=145&AppType=Weblog&ContentType=0" width="1" height="1">