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After ordering a bajillion different connectors and waiting for them to arrive, I have now made a nearly complete prototype of my #solar #meshtastic #radio node.

The current sensor is a bust l. When the battery is dead, the solar panel can't power the device or charge the battery pack if run through the current sensing circuit. I'll double check the documentation to make sure I didn't miss anything, but that's looking like it's going to be a bummer.

And I say *nearly* complete because I haven't wired in the MPPT board to make the most out of the #solar cell. (Hmm, I should check the current limit on that to figure out how many solar panels it can handle... hopefully at least one, ideally multiple in parallel).

#electronics #solarpunk #decentralized #mesh #network #decentralize #MeshNet

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Discussion

Liberty Farmer 11mo ago

What board / chipset are you building off of?

Dr. Hax 11mo ago

RAK Wireless gear. I'm probably going to switch to the meshtastic starter kit because it'd actually be cheaper than buying boards without any USB connector (strangely enough).

Dr. Hax 11mo ago

OK, the MPPT boards can output up to 1A, which means 4.2W. So probably one per panel.

But now I realized I only know the voltage of my panel, not the current (it's homemade). I'll have to see if I gave any info on the cells that I used when I built these panels more than a decade ago.

I can't measure more than 1A worth my meter, but borrowing a better ammeter is my backup plan.