A few months ago, I found this Hacker News post about the AirGradient DIY Air Quality Monitor . I had already been considering buying an AirThings Wave Plus sensor to monitor my home's CO2 levels, but the high price and limited 'ownership' of the data coming from it turned me off.

So I built two AirGradient DIY air quality monitor boards (see above), and integrated them into my Prometheus + Grafana home monitoring setup I've been using to monitor other things in my house:

The Sennheiser MKE 200 is a compact shotgun microphone, and it's a small and cheap way to improve the sound you get for vlogging, or b-roll footage over the built in mic on your camera or phone.

I bought this microphone for use making my YouTube videos, and I'm not getting any compensation for this review. I just wanted to see if it would be a good 'run and gun' mic for some of my work, and to share my thoughts here.

After

Ahmad Byagowi, the project lead for Open Compute Project's Time Appliance, reached out to me a couple weeks ago and asked if I'd be willing to test the new Time Card Facebook had announced in mid-August on a Raspberry Pi Compute Module 4. Since I have a sort of obsession with plugging anything and everything into a Pi to see what works and what doesn't, I took him up on the offer.

The official specs had PCI Express Gen 3 on a x4 slot as a

Today I released a video about how—and why—I 3D Printed my Grandpa and put him on my bottle of ketchup. Watch it here .

I sculpted a bust of my Grandpa in high school, gave it to my grandparents, got it back after he died and my Grandma moved out of her house (I wrote a tribute to my 'Grandpa Charlie' ), and I kept on moving it around my office because I didn't have room for it:

I shoot the 'A-roll' for my YouTube videos with a Sony a6000 and a small Glide Gear TMP 75 smartphone teleprompter :

Until recently, I had these mounted on a tripod just off the back corner of my desk:

After I posted my Raspberry Pi Blade server video last week, lots of commenters asked what you'd do with a Pi cluster. Many asked out of curiosity, while others seemed to shudder at the very idea of a Pi cluster , because obviously a cheap PC would perform better... right?

Before we go any further, I'd say probably 90 percent of my readers shouldn't build a Pi cluster.

But some of you should. Why?

Well, the first thing I have to

I've been getting into OpenSCAD lately—I'd rather wrestle with a text-based 3D modeling application for more dimensional models than fight with lockups of Fusion 360!

One thing I wanted to do recently was model a sheet-metal object that would be cut from a flat piece of sheet metal, then folded into its final form using a brake. Before 3D printing the final design, or cutting metal, I wanted to 'dry fit' my design to make sure my

A few weeks ago, I received two early copies of Uptime.Lab 's CM4 Blade.

The Blade is built for the Raspberry Pi Compute Module 4 , which has the same processor as the Pi 4 and Pi 400, but without any of the built-in IO ports. You plug the CM4 into the Blade, then the Blade breaks out the connections to add some interesting features.

A 1U rackmount enclosure is in the works, and 16 ¹ of these boards would deliver:

After months of testing various SATA cards on the Raspberry Pi Compute Module 4, the default Raspberry Pi OS kernel now includes SATA support out of the box .

In the past, if you wanted to use SATA hard drives or SSDs and get native SATA speeds, and be able to RAID them together for redundancy or performance, you'd have to recompile the Linux kernel with SATA and AHCI.

Sure you could always use hard drives and SSDs with SATA to USB adapters, but you sacrifice 10-20%