A few weeks back, I caught a video on AvE’s YouTube channel of graphics drawn on an oscilloscope, given an audio input. Last week, Ben, Garrick and I decided to give it a try at OMG.
According to Garrick’s research earlier that week, “older scopes” do better with this sort of thing, and OMG’s scope is plenty old. We had to do some tinkering with the settings, and the phase, eventually arriving with the left channel on Input 2, alternating vertical and External trigger (ch2). It worked best if the laptop volume was turned clear up, as it gave the best signal to noise ratio.
We’d initially hooked the scope directly to a laptop headphone jack (through a spaghetti of cables), but as Eric pointed out “To be music, there’s gotta be…music”, and no devices we had would play on the headphone jack AND the internal speakers at the same time. We ended up hacking up a powered speaker to give us a stereo output and play both channels on a single speaker. This gives us something to feed the oscilloscope AND lets folks hear what the audio actually sounds like. In addition, it had a lot less noise than our initial mess of wires.
As for what we played, we just searched YouTube for “Oscilloscope Music”. Someone who works with Jeff mentioned Aphex twins “windowlicker” and “songs about my cat” by Venetian Snares as two examples of spectrographic songs.
For years, our makerspace has used a hodgepodge of solutions for storing members’ projects in progress and other personal belongings. Most recently, we’ve used a dozen or so plastic totes. The totes worked great, but were limited in quantity (they were industrial waste, and no more matching totes were available) so that not everyone could have one. Additionally, these totes were slightly trapezoidal, which wasted quite a bit of space between them.
To that end, Ben and Kevin undertook a project to convert personal storage to standard Letter/Legal Banker’s Boxes, which are readily available and pack more densely. They are a bit smaller than the totes we were using, but most members totes weren’t full, and we can store twice as many boxes in the same space.
If I hadn’t seen this myself, I don’t know that I’d believe it. Last night, we set out to test this Popsci article, and it seems to hold up.
We had 2 locks donated, a generic U-Lock, and a pretty beefy looking keyed padlock. The U-Lock’s steel turned out to be a bit too soft, and just bent a bunch, but the shackle on the padlock failed relatively quickly.
All said, we used 2 cans of air, but quite a bit of that was spent on the first lock. Both the body of the lock and the shackle sustained quite a bit of damage, though the damage to the body was mostly cosmetic and probably not “breaching”.
If I were to try it again, 2 things: 1. Strike the shackle directly, with a chisel or something, instead of the hammer face. 2. More lighting. Â The high-speed video was too dark to really show anything interesting. Â I keep forgetting how much light that thing takes..
Would you like to learn about lock picking? Come to our meeting Tuesday July 10th @ 7pm.
The meeting will feature a talk from a member of Toool.us (The Open Organization of Lockpickers), Steve Beck.
Steve will cover three topics, two of which are a little more hands on-ish, the first will be a basic lockpicking talk, the second will be a re-keying talk with a demo and the third will be about making your own picks with a demo.
Stick around after the talk for socializing and Makery Shenanigans.
RedBull Creation challenge entry. It’s a brain-wave game. The players stand on opposite sides with wireless headsets that measure brain waves. One of them presses the big red button on the back, and then as they focus the power of their minds, the arm responds to their brain wave readings, and moves back and forth according to who is focusing best. After 10 seconds the Bullduino (visible at the front in the window) checks whether the pointer is in one of the green scoring zones. If it is still in the yellow zone, it’s a tie and it just returns to center. If it is in one of the green zones the player on that side is the loser, and the ball sprays that player.