Weather Station 3V PSU

It looks like we’re not getting enough sun light to charge the batteries in my weather station, so I had to built a simple LM317 based 3V supply that I could get into the battery compartment. This should allow me run a 12V supply to the remote station.

Tried to build in 3D to maximise space.. Heating won’t be a problem, the weather station draws 20mA for about 1sec every 30sec or so for the transmission, the rest of the time the draw is about 8mA. Here are a few photos of the build:

Compact LM317 3V supply (top)

Compact LM317 3V supply (top)

Compact LM317 3V supply (bottom)

Compact LM317 3V supply (bottom)

Compact LM317 3V supply (top)

Compact LM317 3V supply (top)

 

Installed in the battery box of the weather station remote

Installed in the battery box of the weather station remote