/learn/learning-center/stem-academy/microbit/b/blog/posts/project-bbc-micro-bit-someone-behind-you-sensor---part-2---led-indicationThis is Part 2 of the Micro:bit version of the someone behind you sensor. For those who did part 1, this one adds an addressable LEDs to indicate when the PIR motion sensor is triggered. It also has a secondary nightlight mode that turns on the...en-USTelligent Community 12https://community.element14.com/learn/learning-center/stem-academy/microbit/b/blog/posts/project-bbc-micro-bit-someone-behind-you-sensor---part-2---led-indicationMon, 20 Aug 2018 00:11:24 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0e68a11f-a4c6-4721-91cd-7c5cbf4520ccgenebren0<p>Nice little project.&nbsp; PIR sensors are pretty cool devices.&nbsp; I have worked with multiple PIR sensors and recently built one from scratch for a client that wanted tight integration of the sensor into a single board solution.&nbsp; I was happy to find available detectors and lenses for under $4.00 in low volumes.&nbsp; These coupled with an amplifier and microcontroller (already being used in other parts of the design) and you have flexible and programmable PIR detector.</p><p>&nbsp;</p><p>Gene</p><img src="https://community.element14.com/aggbug?PostID=5374&AppID=140&AppType=Weblog&ContentType=0" width="1" height="1">