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.

 

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 ...

 

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 ...

Hello,

These are the specs. Albeit vague

https://www.davisinstruments.com/product_documents/weather/spec_sheets/6250_6351_57_SS.pdf

Bruiser

 

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?



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?