bounty - solar powered adapter

[ryanckulp]

(for existing TRMNL developers, join the Discord and visit the #ideas > solar powered TRMNL thread)

requirements

1. should not require opening up / modding device
2. USB-C adapter to solar power

scope

• build working prototype that provides enough power for a 0% battery to produce screens every 15 mins
• provide BOM / purchase list / docs for anyone to build this themselves (+ we may also assemble some as an accessory)
• design or source 2x mounting options that cover indoor vs outdoor use (ex: kickstand vs wall plate + swivel toward sun)

compensation

$699

next steps

reply to claim, then report progress every 5 days to prevent release back to the community.

[yankobogdan]

I've ordered parts
It will take longer than 5 days to arrive
So, I don't want to claim it yet

[ruohki]

I have portable panels and a brick but no sun T_T

[mintdotco]

would something like this work?
https://www.alibaba.com/product-detail/Type-C-USB-Output-6v-5w_1601193133849.html
or
https://www.alibaba.com/product-detail/7W-Solar-Security-Camera-Charr-5V_1601350601791.html?selectedCarrierCode=SEMI_MANAGED_ECONOMIC@@ECONOMY

[yankobogdan]

would something like this work? https://www.alibaba.com/product-detail/Type-C-USB-Output-6v-5w_1601193133849.html or https://www.alibaba.com/product-detail/7W-Solar-Security-Camera-Charr-5V_1601350601791.html?selectedCarrierCode=SEMI_MANAGED_ECONOMIC@@ECONOMY

I've ordered smth very similar to test
I am almost sure it will work under decent sun, but not sure for the room conditions
So it's would be a subject of testing

[ruohki]

What spec is the original charger?

6V 5W 1.2A from the Panel is a weird Powerspec. I would assume 5V or 9V so that USB-C power is probably just VCC and GND rather than properly implemented USB-C PD.

[yankobogdan]

We need a stable 5V on the charger output
Even a low current like 0.1A would work
A cheap charger wouldn't be efficient, but it could be sufficient

[NetForces]

I have one of these here: https://www.spypoint.com/en/products/lithium-battery-solar-panel-5w/splb-10

Would work great. It has a direct 5V USB output.

[yankobogdan]

I have one of these here: https://www.spypoint.com/en/products/lithium-battery-solar-panel-5w/splb-10

Would work great. It has a direct 5V USB output.

Agree, but quite expensive
It has 7500mA battery capacity itself

[NetForces]

There is also Voltaic: https://voltaicsystems.com/small-solar-panels/ that has great options.