I wanted to share this project with the community in case you have similar challenges. I do NOT however want to get into a debate on the cost of batteries vs the cost of converting sensors to batteries which has been debated several times on this community; I realize this is more expensive. But I value my personal time and this has and will save me there.
Several years ago when still using the ST platform, I explained how I converted a few sensors from batteries to USB power:
Recently I wanted to do the same to several Iris Motion sensors in my home that are a pain in the butt to get to given 10 foot ceilings and furniture underneath. Accessible attic space is above these 3 motion sensors so it was easy to run wires. The challenge:
- I wanted to be able to easily pop out the "battery" in case I needed to reset the motion without having to go into the attic.
- I needed to conceal the wiring for spouse approval
- My original ST solution which involved putting the step down voltage regulator inside the sensor which doesn't allow for either wants above.
I was inspired by this "Battery Eliminator" post and came up with a solution. I took one of my CR2 batteries to my local box store and purchased a dowel with a similar diameter, some small screws, and leveraged a box of 2 conductor security wire that I already have. Below is the final product. Differences from the Instructables Article:
- Instead of a selectable DC power adapter, I am using a 5V to 3.3V Step Down Voltage Regulator found on Amazon. This is the product I had mentioned in my ST article years ago.
- I used a hack saw to cut a small cross cut on the dowel so the wires leading to the screws can be pushed into it. My OCD didn't like the pictures in the article.
My battery eliminator:
Drilled hole into top of motion sensor for wire:
Battery eliminator installed into Iris Motion:
Over the weekend, I also installed one into a Sage Doorbell sensor that I put into my crawl space by the doorbell transformer: