I recently received an email from someone asking me how I got the voice recording in my videos to sound so clear and strong. The answer to that question is much more complex than I'll deal with here, but that person asked me mostly about the microphone I used, and if that could make a big difference in getting better recordings. Here's what I replied:
I didn't know it at the time, but my results testing the EDUP WiFi 6 card (which uses the Intel AX200 chipset) on the Raspberry Pi in December weren't accurate.
It doesn't get 1.34 gigabits of bandwidth with the Raspberry Pi Compute Module 4 like I stated in my December video, WiFi 6 on the Raspberry Pi CM4 makes it Fly!.
I'm very thorough in my benchmarking, and if there's ever a weird anomaly, I try everything I can to prove or disprove the result before sharing it with anyone.
In this case, since I was chomping at the bit to move on to testing a Rosewill 2.5 gigabit Ethernet card, I didn't spend as much time as I should have re-verifying my results.
I got this Rosewill RC-20001 PCIe 2.5 Gbps Network Adapter working on the Raspberry Pi Compute Module 4.
Right after I got the card working, though, I tested it in an external powered PCI Express riser, and that test released the card's magic smoke. Oops.
Here's a dramatic re-enactment that's actually pretty accurate to what it looked like in real life:
Luckily, buying a replacment wasn't too bad, since the card is less than $20. But to get it to work on my spiffy new ten gigabit network, I also had to buy a new SFP+ transceiver that was compatible with 1, 2.5, 5, and 10 Gbps data rates, and that cost $60!
Obviously there's a vast difference between a new Core i9 laptop with 32 GB of RAM, a dedicated GPU, and a 2 terabytes of fast storage and a tiny Raspberry Pi running ARM. So it wasn't a fair fight, but I could do a lot of things well enough, and every generation of Pi has gotten better.
A few weeks ago, someone from Mindshare Management asked me if I'd like to do the same test, but this time with an almost one-for-one replacement laptop: the new Kubuntu Focus M2.
Review video: Check out the video that goes along with this review:
There are many Raspberry Pi projects where I spend a few hours (or dozens of hours) building something with a Pi, and realize at the end that not only could I have purchased an off-the-shelf product to do the same thing for half the component cost, but it would work better too.
But this is not one of those projects:
The Raspberry Pi and its HQ camera make a surprisingly potent webcam, and if you want to cover the basics, and rival the image quality of all but the highest-end dedicated webcams, you can do it for under $100.
Above is a single frame from a recording I did with the HQ Camera on my Raspberry Pi Zero W connected as a standard USB webcam using the Camera app on Windows 10 on my Dell laptop.
After the Raspberry Pi 400 was launched earlier this morning, there was a lot of discussion over the thermals and performance of the upgraded 1.8 GHz System on a Chip inside:
I wanted to spend a little time in this post testing overclocking, performance, power consumption, and thermals in depth.
There is also a video that goes along with this post, if you're more visually-inclined:
Today Raspberry Pi Trading announced the Raspberry Pi 400, the latest in the series of small education-focused computers that started with the original Raspberry Pi in 2012.
But the Pi 400 delivers something many have desired: an official Pi 4 board built right into a Pi Keyboard, in a space- and performance-efficient way.
Six years ago, the Raspberry Pi Foundation introduced the Compute Module: a teensy-tiny version of the popular Raspberry Pi model B board.
Between then and now, there have been multiple revisions to the Compute Module, like the 3+ I used in my Raspberry Pi Cluster YouTube series, but they've all had the same basic form factor and a very limited feature set.
But today, that all changes with the fourth generation of the compute module, the Compute Module 4! Here's a size comparison with the previous-generation Compute Module 3+, some other common Pi models, and an SD and microSD card (remember when the original Pi used a full-size SD card?):
Both posts generated great discussion, and there were three things I wanted to cover in this follow-up, namely:
- Which drives support UASP
- Real-world performance benchmarks
- TRIM support
For reference, here are all the products I'm testing in this post (product links are to their Amazon product page, starting from top middle, clockwise):
While it's forte is stills photography, the D750 isn't bad at video; it can output up to 1080p at 60 frames per second, and has full-time autofocus, but the live view autofocus isn't that great, so I recommend manual focus if you don't have to move around much.
Why would you use a D750? Well, for the same reason you'd use most any other DSLR or mirrorless camera for video instead of a cheaper webcam or built-in camera on your laptop: the video quality is amazing!