![\"BunkerHIllMotionSensorSale\"](\"http:\/\/www.apolonio.com\/blog\/wp-content\/uploads\/2015\/12\/BunkerHIllMotionSensorSale.jpg\")
<\/a>![\"BunkerHillMotionSensorCoupon\"](\"http:\/\/www.apolonio.com\/blog\/wp-content\/uploads\/2015\/12\/BunkerHillMotionSensorCoupon.jpg\")
<\/a><\/p>\nSince I had a coupon I decided to try one out. \u00a0I am sure glad I did, now I am ready to pick up a couple more.<\/p>\n
There are two parts, a motion sensor transmitter and a receiver chime.<\/p>\n
I wasn’t going to modify the transmitter, I just worked on the receiver part.<\/p>\n It uses either 3 C Size batteries, there is a label outside saying it can take a 6 volt DC power supply as well, but I tried a 5V power supply and it works too.<\/p>\n There are 6 screws holding this shut, 4 slightly larger screws were external, 2 were under the battery.<\/p>\n I looked at the PC board and using a digital multimeter I was able to identify the where the chime signal came out.<\/p>\n When the alarm triggers, it sends a .4V signal down the signal line. \u00a0Attaching the other link to your arduino, rasperry pi, or esp8266 ground makes this thing work.<\/p>\n In my arduino code I simply use the digitalRead function. \u00a0I am decided to use a NodeMCU.<\/p>\n The actual hardware mod took less than an hour, \u00a0now that I know what plugs where, I would say it would take me half an hour to do one.<\/p>\n","protected":false},"excerpt":{"rendered":" This mod was so amazingly simple. \u00a0A couple of weeks ago I saw this ad in some Harbor Freight flyer I got. Since I had a coupon I decided to try one out. \u00a0I am sure glad I did, now … Continue reading <\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n