Meat Smoker From 55gal Drums

[Joel] wanted to use his newly acquired welding skills to make something useful. With tasty flesh in mind he put together this meat smoker. What resulted is incredible, but the fact that he then gave it away as a gift is just amazing.

A curved joint between two pipes is known as a ‘fish mouth’. They can be a hassle, as with the pirate wheel project, but [Joel] used his noggin to make things easier. He first modeled two 55 gallon drums in CAD. The intersecting curve was then generated by the software, printed out on paper, and stenciled on the drum to be cut out with a jigsaw.

[Joel’s] writeup is greatly detailed and shares many pictures. He makes every part of this smoker, including the wood handles and the stainless steel grates. The guy really knows how to build stuff, but we should have known that after seeing the Crushtoberfest.

MIDI Controlled Fire Drums

[youtube=http://www.youtube.com/watch?v=Zmp74fO2a38]

Using an MSA-T MIDI Decoder from Highly Liquid, [Rob Darman] was able to take the MIDI output of his Roland V-Drums and use that output to control fire shooting cannons, forming a setup that he calls fire drums. As seen in the video above, the response time between the V-Drums and the fire drums is pretty impressive. While this is by far one of the coolest things that we’ve seen controlled by MIDI, we’re naturally thinking about taking this to the next level; MIDI-controlled fireworks, anyone?

You may remember the MSA decoder devices from people wiring up MIDI drums to Rock Band.

MIDI Drums For Guitar Hero And Rock Band

[youtube=http://www.youtube.com/watch?v=2a497Hom8Gg&fmt=18]

Embedded above is [egyokeo]’s solution for using MIDI drums with Guitar Hero. He’s playing a DrumKAT MIDI kit. It connects to a PC running his MIDI Hero software, which handles timing and multinote combinations. The PC uses a USB ToolStick microcontroller to send commands to the console using an FPS adapter or soldered into the instrument. It’s a fairly good solution if you’re building a generic controller and need to modify the signaling.

When Rock Band was first released, modders sought to adapt their MIDI drum kits for use with the game. The easiest solution they found was Highly Liquid’s MSA-P. It’s a photorelay based MIDI decoder. You need to solder directly to the brain in the Rock Band drums. If you’re planning on modding any instrument, check the compatibility matrix first. Hopefully you’ll end up with something that can be used across multiple games.

[via Gizmodo]

RP2040 Boot Loader Is A Worm

[Hunter Adams] has written a secondary bootloader for the RP2040 that uses an IR link and can be extended to behave like a polite worm virus. This allows the easy updating of a large cluster of co-located RP2040-based controllers. This could be handy in applications like swarm robotics or virtual cattle fencing. The project he demonstrates in the two videos ( below the break ) uses a pair of IR transmitters/receivers. But he purposely wrote the boot loader to be independent of the serial link, which could be infrared, radio, audio, or just wires.

Not only did [Hunter] make a boot loader, but he documented the entire boot process of the RP2040 chip. Whether or not you need a secondary bootloader, this is an excellent resource for understanding how the RP2040 responds to power cycling and resets. The boot loader code is available at his GitHub repository.

You may recall that [Hunter] is the lecturer of Cornell University’s Designing with Microcontroller classes, whom we’ve mentioned before. We’ve also covered some of his students’ projects as well, like these air drums and this CoreXY pen plotter.

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Retrotechtacular: Air Mail For The Birds

Today, if you want to send a message to a distant location, you’ll probably send an e-mail or a text message. But it hasn’t always been that easy. Military commanders, in particular, have always needed ways to send messages and were early adopters of radio and, prior to that, schemes like semaphores, drums, horns, Aldis lamps, and even barrels of water to communicate over distances.

One of the most reliable ways to pass messages, even during the last world war, was by carrier pigeon.  Since the U.S. Army Signal Corps handled anything that included messages, it makes sense that the War Department issued TM 11-410 about how to use and care for pigeons. Think of it as the network operations guide of 1945. The practice, though, is much older. There is evidence that the Persians used pigeons in the 6th century BC, and Julius Caesar’s army also used the system.

You wouldn’t imagine that drawing an assignment in the Signal Corps might involve learning about breeding pigeons, training them, and providing them with medical attention, but that’s what some Signal Corps personnel did. The Army started experimenting with pigeons in 1878, but the Navy was the main user of the birds until World War I, when the U.S. Pigeon Intelligence Service was formed. In World War II, they saw use in situations where radio silence was important, like the D-Day invasion.

The Navy also disbanded its earlier Pigeon Messenger Service. It then returned to avian communications during the World Wars, using them to allow aviators to send messages back to base without radio traffic. The Navy had its own version of the pigeon manual.

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Hackaday Podcast Episode 259: Twin-T, Three-D, And Driving To A Tee

Hackaday Editors Elliot Williams and Al Williams sat down to compare notes on their favorite Hackaday posts of the week. You can listen in on this week’s podcast. The guys talked about the latest Hackaday contest and plans for Hackaday Europe. Plus, there’s a what’s that sound to try. Your guess can’t be worse than Al’s, so take a shot. You could win a limited-edition T-shirt.

In technical articles, Elliot spent the week reading about brushless motor design, twin-t oscillators, and a truly wondrous hack to reverse map a Nintendo Switch PCB. Al was more nostalgic, looking at the 555 and an old Radio Shack kit renewed. He also talked about a method to use SQL to retrieve information from Web APIs.

Quick hacks were a decided mix with everything from homemade potentiometers to waterproof 3D printing. Finally, the guys talked about Hackaday originals. Why don’t we teach teens to drive with simulators? And why would you want to run CP/M — the decades-old operating system — under Linux?

Download the file suitable for listening, burning on CDs, or pressing on vinyl.

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Solar E-Ink Weather Station Works On Dark Days, Too

One way to get through the winter doldrums is to take notice of the minuscule positive changes in weather as spring approaches. Although much of the US is experiencing a particularly warm month, that’s not the case in Germany where [rsappiawf] resides. Even so, they are having a good time charting the weather on their new solar-powered E-ink weather station.

And in spite of the dark winter days, the device has been delivering weather updates for over a week on solar power alone. The brains of this operation is an ESP32 S3 Mini, which [rsappiawf] operated on a little bit. For starters, they removed the integrated RGB LED in order to save precious milliamps. Then they upgraded the voltage regulator to a TPS73733DCQR.

[rsappiawf] also has a TPL5110 power timer breakout module in the mix, which saves even more power by only turning on every once in a while according to the potentiometer setting, and only then turning on the project’s power. Check out the brief demo after the break, including the cool sliding action into the 3D-printed holder.

There’s a lot you can do to lower power consumption in a project like this. Here’s one that will go 60 days on a charge.

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