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WFMU bryce / health / mutual aid 

WFMU's wonderful Bryce had a really bad motorcycle accident recently. He's a freelancer with no health insurance. This fundraiser is for his medical bills, and isn't related to WFMU except everyone cares about him.

Here's the fundraising page if you are able to contribute:

gofundme.com/f/weve-kept-his-b

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internet office hours 

I'm going back to internet office hours for a while, which I'm not sure I really need to announce here, but FWIW.

It seemed to help my mental health a lot, to keep a list of things I wanted to use the internet for as they came up, then switch the modem on twice a day, do some of the internet tasks I'd written down previous, then switch it off again.

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It's cool seeing many new posts, I'll do one too.

I'm a composer based in the US midwest. My dayjob is fixing leaks in the fundraising system at a non-profit radio station. (We're slowly working on something we can open source for others to use...)

Otherwise I sometimes manage to stave off the horrors of life by playing with paper stuff, making little one-off book(let)s and playing my trumpet through various pieces of cardboard.

line level 

line level is...

what the hell is line level???

I've been measuring it from different "line level" devices on the scope my friend lent me.

maybe -200 millivolts to 200 millivolts is reasonable?

there seems to be no standard.

He Can Jog boosted

Essay editing and listening to Radio Jiro special Vangelis mix from a few years' back - what an amazing legacy: nts.live/shows/radio-jiro/epis

He Can Jog boosted

basic electronics 

Measured current with my meter for the first time yay haha.

My theory about the traces burning up because of too much current was very much unfounded. I measured ~31 microamps of current coming out of the battery, and ~4.7 microamps coming out of the opamp.

I'm not sure what amount of current I'd have to start worrying about, but that certainly isn't it. :)

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basic electronics 

Huh, well it all looked fried but I can't find any issues with the circuit now that I've got it plugged back into the scope.

I bet those terminal connectors are to blame. They're so easy to wiggle loose.

Tim Hunkin foretold this! Why didn't I listen to Tim!? Lol, well anyway this is encouraging. I think I can improve the connector situation without having to redo the whole amp circuit.

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basic electronics 

I dunked it in the river! The container leaked, this is certain. I assumed that's why it stopped working after a while haha. After taking it apart though, I found the battery still has a charge, and the solder points running along the ground side of the power connections look sorta tarnished. I see a little corrosion already from the water too!

I'm not sure what happened yet. Some ideas:

- The water shorted the battery out for a moment.
- The water corroded the solder enough to break the circuit.
- One of the terminal block connections came loose when I tossed it all into the river.
- I never measured the overall current going through the output of the opamp. Based on how the the traces on the ground side of the battery look (where current flows from IRL) maybe part of the circuit burned out from the current before any of the above even had a chance to happen.

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He Can Jog boosted

New publication and album out today on my new label. Ruaridh Law's 'A Sea of Cogs' which looks at work and identity at the beginning of the pandemic.

Grab a limited run book, or the digital version that includes a PDF.

blinktag.bandcamp.com/album/a-

basic electronics 

oh also I tested this first with the piezo glommed onto the solenoid in the first pic: it worked... then stopped working! haha. no idea what happened, but I assume my shitty soldering job is implicated somehow. :)

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basic electronics 

It works! I finished soldering this prototype over lunch. Tonight or tomorrow morning: waterproofing. Then I shall dunk it in the river and seeeee.

hecanjog.com/v/piezo-amp-updat

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basic electronics 

I'm back home today and tried wiring up an opamp to amplify a little test tone through a piezo.

It worked!!! Also: it worked on the first try! That's never happened before haha. Probably since the only thing I had to worry about was plugging things into the right pins on the chip, and picking two resistors out.

This is fun and exciting. I'm really looking forward to dunking a hydrophone with a preamp into the river.

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mildly crass 

I'm nearly 40 and I still giggle every time I use the phrase "take a fresh dump" at work. (As in: database dump.)

basic electronics 

While I'm in Milwaukee a friend showed me how to use an opamp. I'm excited, it's actually not as hard as I thought it would be!

If you hook the output of the opamp to the inverting input through a resistor, and hook the non-inverting input to ground (which he tried to explain to me the reasoning behind, but I don't get it) then you can just stick inputs with one resistor each into that inverting node, and they'll mix together! Changing the value of the resistor in the feedback loop from the output to the inverting input adjusts the gain, and changing the value of the resistor in front of the inputs going in for mixing will attenuate them. This is sooooo cool.

The output is phase inverted when you do it this way, but the math for figuring out resistor values is simpler (mix resistor divided by feedback resistor == gain IIRC) so he recommend going with it and just putting a second one in front to flip the phase back in place if needed.

ALSO, since most opamp chips have 2+ opamps, you can do a thing where you take the output from the phase inverted one for one line of a balanced cable, and the output from the second one with the input from the first fed back so they're out of phase... and there's your balanced cable noise cancelling magic!

Gonna record many little fish sounds, I'm excited.

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He Can Jog boosted

Also, for anyone who might not know me, I'm a musician who lives in Louisville, KY USA. I've performed as Shedding for over 20 years now (time flies 👀), was a member of a handful of rock bands over that time as well, and currently play guitar in an untitled art pop group, play synth in the Free Electronic Association of Louisville (Flanger Magazine, Hairbrushing, and I were founding members, but it includes potentially many others), mutant techno in a duo with my buddy Hairbrushing called GERUNDS, and work with my pal Tim Barnes making weird crispy electronic 'dance' music just for fun.

I'm a former educator looking to return if the situation is right, but until then working in logistics at a motorcycle parts/accessories company, which is sort of refreshingly low-stress. Low pay too unfortunately.

I love learning and reading, so I appreciate the perspectives shared by the super brilliant folks here about music, art, and technology.

My general website with miscellaneous info, dachshund photos, and a link to the Shedding page:

sellanraa.info/

internet office hours 

I think doing the thing where I just write down thoughts of stuff I want to do on the internet for the next time I turn on the modem is also helping me practice delayed gratification? I think that's something I'm pretty bad at.

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internet office hours 

internet office hours is the wrong way to put this. I'm just turning my modem on for periods when I want to use it, but leaving it off normally.

this helps me not strap into the matrix as soon as I wake up, or spend the entire day plugged in, but I still like to hang out online for stretches, like tonight for example I'm enjoying hanging out online for a while. 🙂

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tim hunkin's secret life of componets 

I made my way through his secret life of components series. I can tell it's something I'm going to enjoy revisiting again and again. So much great information, but just watching him mess around with all sorts of stuff has been incredibly inspiring, too.

The series: youtube.com/watch?v=6JAgXz6xO0

basic electronics 

glommed this hefty piezo onto a solenoid for... reasons ;-)

to be less flippant, the idear is basically to have a microcontroller make a toot sound through the piezo at the same time it activates the solenoid. gonna pick up some 1-2mm ball chain at the hardware store to hang off the edges of the piezo, hopefully making it into a little computer-controlled rattle-beep-dingus.

I might have ruined the crystal when I soldered onto it (underneath those blobs of hot glue is a mess of solder) so we'll see haha. Might have to redo the whole thing, but that's fine. This was a good first test. Now I need to try to work out an amplifier circuit for the piezo...

He Can Jog boosted

Do I have friends on here that formally do web accessibility consulting services? I would love to have a contact on hand to point people who would be willing and able to pay for such services in the future.

Amina Claudine Myers 

Her most recent album is really beautiful too. Compresses everything I love about her work into piano and voice.

discogs.com/release/19813219-A

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Amina Claudine Myers 

A friend just turned me onto this wonderful early album of hers:

youtube.com/watch?v=3lZjNhUKbc

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post.lurk.org

We are an instance for discussions around cultural freedom, experimental, new media art, net and computational culture, and things like that.

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