Replacing 3v 1300mA CR123 battery on Weather Sation with Solar.

Thread Starter

Bruiser

Joined Jun 4, 2019
10
upload_2019-6-4_12-30-47.png
The weather station has what they refer to as a super capacitor that has failed over a 6 year lifespan.

As a result of a failed solar charged capacitor, the lithium battery will last approximately one week.

Replacement parts would cost over $100USD

So I made it my own challenge to build a 3.3v 0.35mA power supply to replace the lithium ion battery.

Thoughts on 12v solar charging solution on 3.3v stepdown for a semi permanent solution?

Step down produces 3A

How do get 3A reduced to .35mA (would a 0.35a fuse wired to 3A lead work?)

Does this sound like a decent idea, or a bad idea?

Any advice is good advice.
 

Attachments

mvas

Joined Jun 19, 2017
538
View attachment 179022
Thoughts on 12v solar charging solution on 3.3v stepdown for a semi permanent solution?

Step down produces 3A

How do get 3A reduced to .35mA (would a 0.35a fuse wired to 3A lead work?)
Step-Down does not "produce" 3 amps
The Weather Station draws 30 ma (peak)
What are the spec's of ...
a) The Solar Panel
b) The Super Cap / Rechargeable Battery
c) The Step-Down Buck Converter
Yes, it can work ...
 
Last edited:

Thread Starter

Bruiser

Joined Jun 4, 2019
10
Step-Down does not "produce" 3 amps
The Weather Station draws 30 ma (peak)
What are the spec's of ...
a) The Solar Panel
b) The Super Cap / Rechargeable Battery
c) The Step-Down Buck Converter
Yes, it can work ...

And is this all I need?

upload_2019-6-5_6-51-53.png

Input: 10W Solar Panel to 12v charge controller to battery

Output:
a. 12v battery to buck converter input
b. Buck converter output to (fuse?)
c. (Fuse?) out soldered to station terminals

Thoughts?
 

Attachments

Top