Traveling through mainland Europe on a British passport leads you to several predictable conversations. There’s Marmite of course, then all the fun of the Brexit fair, and finally on a more serious note, beer. You see, I didn’t know this, but after decades of quaffing fine ales, I’m told we do it wrong because we drink our beer warm. “Warm?”, I say, thinking of a cooling glass of my local Old Hooky which is anything but warm when served in an Oxfordshire village pub, to receive the reply that they drink their beers cold. A bit of international deciphering later it emerges that “warm” is what I’d refer to as “cold”, or in fact “room temperature”, while “cold” in their parlance means “refrigerated”, or as I’d say it: “Too cold to taste anything”. Mild humour aside there’s clearly something afoot, so it’s time to get to the bottom of all this. Continue reading “Why Do Brits Drink Warm Beer?”
Outwardly, this sleek CO2 monitor designed by [Daniel Gernert] might look like something cooked up in Amazon’s consumer electronics division. But open up that 3D printed case, and you’ll find a surprisingly low parts count that’s been cleverly packed in so as to make the most of the enclosure’s meager internal dimensions.
There are, if you can believe it, just three principle components to this device: a Seeed Studio Seeeduino XIAO microcontroller, a Infineon S2GO PAS CO2 sensor board, and a ring of WS2812B LEDs. You could even delete the ring altogether and replace it with a single addressable LED to accomplish the same goal, but we’d say the full ring is money-well-spent if you’re going to spin up your own copy.
Functionality is very straightforward — the LED ring will indicate the detected CO2 concentration by lighting up green and working its way through yellow and onto red. The sensor has no wireless capability, but if you plug it into your computer, you can get a local readout of current conditions.
We love environmental monitoring solutions here almost as much as we love intricately designed 3D printed enclosures. If you’d like to see another project where those two concepts aligned, check out this printable ESP8266 sensor enclosure.
[James Sharman] has been working away on a 8-bit CPU of his own design. Naturally, with his computing device largely functional, the obvious question was asked: can it run DOOM? [James’] latest video explores this question, showing just how close he was able to get.
[James’] 8-bit pipelined CPU also has its own UART, VGA adapter, and sound adapter all built up on discrete components on various PCBs. There’s also a custom interface for a SNES controller as an input device. However, it’s fundamentally well below the specs that DOOM originally required at launch. His 8-bit CPU runs at just 4 MHz, with 64 KB of RAM. This compares poorly to the 32-bit, 33 MHz Intel 386 chips and 4 MB of RAM originally recommended to run the game.
In lieu of running the real thing, [James] demonstrated the limitations of his machine by coding his own demo, nicknamed Doomed. It’s able to average 19 fps video output at a resolution of 80×60, and consists of over 5,000 lines of hand-written assembly code. Fundamentally, it’s a basic 3D engine not dissimilar to Wolfenstein 3D, though without any actual gaming interactions involved.
[James] could have simply stated the machine won’t run DOOM. However, trying to get something similar up and running was a useful learning experience, and in his own words, highly satisfying. This attitude of pushing on in the face of adversity is what propels many other DOOM porting efforts.