CR123 Battery replacement
Adapter board that drops into a CR123 bay and runs the device from any 4–18 V supply or USB, so the power-hungry sensors stop needing new cells.
Run CR123 battery operated devices with any DC power source.
My Home Automation system have many battery operated devices and the power hungry ones tend to use the CR123 battery type. I got tired of replacing batteries ever too often so I made a CR123 adapter board.
The regulator I use is the 3 V version of LDL1117, but it can use any regulator with the same footprint. It can be powered from any 4-18 VDC source or from USB. In some places I wire it to a mains adapter, in other places I use a Power Bank.
Shelly Flood sensor powered by 12 VDC
Shelly Flood sensor powered by USB
Fitted in a 16 mm tube
In most cases it needs to be hot glued in place, or it can be fitted inside a piece of 16 mm plastic electrical tube to better fit the space of a CR123.
Contact me if you want some and have soldering skills, I have plenty of PCB’s (June 2020).