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Latest project in the category "Is it actually useful or just an elaborate #shitpost?": #USB2Speakon!

It's a fully self-contained, USB-C-powered, 2-channel DAC + 5W Class-D amplifier inside a #Speakon connector.

Use it to connect your phone / laptop to any passive loudspeaker and enjoy surprisingly loud music (probably enough to host a room party)

(GitHub link for the interested: github.com/RainbowLabsDE/USB2S )

Video of it in action and build log below:

#usbc#dac#audio

I know that I have a steep hill to climb in order to help Carbon Dioxide Removal #CDR recover from the damage the #FossilFools and just plain grifters have done to the reputation of Direct Air Capture #DAC.

I'm hoping that the tangible product #BioChar can help to convince people to reconsider DAC for CDR.

The demonstrated recalcitrance of terra preta and ability of any and every farmer/gardener to manufacture and sequester it makes it one of my favorite approaches.
science.org/doi/10.1126/sciadv

Continued thread

My #CDR friends on twitter got mad at me for pointing out that the four regional Direct Air Capture (#DAC) Hubs under the Inflation Reduction Act (#IRA) specify a minimum CO₂ removal capacity of 50,000 tonnes/year.

Hence, each DAC Hub is a #time #machine that takes us back only about 40 seconds a year!

It's important to point this out because some people think CDR is a replacement for #decarbonization and that can never be the case.

energy.gov/oced/four-regional-

Energy.govFour Regional Clean Direct Air Capture HubsFour Regional Clean Direct Air Capture Hubs