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Two 3D-Printed Concrete Projects Bring the Concept Home to the US
Taking a look at the construction of the first 3D-printed home to be funded by a public-private grant and the first residential 3D building. Is this start of 3D concrete printing a new foothold into the U.S. construction industry?
July 21, 2021
PERI
The first home funded by a public-private grant broke ground in early June 2021. Headed up by a 3D printed home construction company Alquist 3D in partnership with the Virginia Center for Housing Research at Virginia Tech., the construction is being done in Richmond, Va., and funded by a $500,000 Innovation Demonstration grant from Virginia Housing. Project:HOMES and the Better Housing Coalition have provided a site, will aid in regulatory compliance such as permits, zoning, and insurance as well as homeownership services.
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PrivacyMic: A smart home system that doesn’t record speech
Microphones are perhaps the most common electronic sensor in the world, with an estimated 320 million listening for our commands in the world’s smart speakers. The trouble is that they’re capable of hearing everything else, too. But now, a team of University of Michigan researchers has developed a system that can inform a smart home – or listen for the signal that would turn on a smart speaker – without eavesdropping on audible sound.
The key to the device, called PrivacyMic, is ultrasonic sound at frequencies above the range of human hearing. Running dishwashers, computer monitors, even finger snaps, all generate ultrasonic sounds, which have a frequency of 20 kilohertz or higher. We can’t hear them – but dogs, cats and PrivacyMic can.
June 10, 2021
In my earlier posts about building a custom Raspberry Pi SATA NAS, and supercharging it with 2.5G networking and OMV, I noted that my builds were experimental only they were a mess of cables and parts, with a hilariously-oversized 700W PC power supply.
I lamented the fact there was no simple SATA backplane on a board for the Raspberry Pi Compute Module 4. But no longer.
Wiretrustee s SATA Board integrates a SATA controller and data and power for up to four SATA drives with a Raspberry Pi Compute Module 4.
And their entire solution makes for a great little Raspberry Pi-based NAS, using software like OpenMediaVault.