01.
Beware fake parts
2021 Jan 21st

Beware fake parts

There are a lot of counterfeit electronic parts in circulation. It's especially a problem with parts that are obsolete, hard to find, or expensive; sold privately in places like eBay or AliExpress at unusually low prices; and shipped from the People's Republic of China. However, just this week I had to deal with a batch of fake TL074 op amps from a well-known US distributor. Here are some notes…

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02.
Listening longer to the Mandelbrot Set
2020 Dec 26th

Listening longer to the Mandelbrot Set

I've long been interested in ways to sonify fractals, and I wrote an article here about Listening to the Mandelbrot Set in 2017. At that time, I was thinking of it as a way to generate a waveform: basically, imagine running a point along the (infinitely wiggly!) boundary of the set, making many complete circuits per second, and use the real and imaginary coordinates of the moving point as w…

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03.
December 2020 updates:  shipping, Twitch
2020 Nov 29th

December 2020 updates: shipping, Twitch

I'm looking forward to a little bit of relaxation in December. I won't be going on vacation this year as I usually would, and that means I can fill orders throughout December. However, my local post offices have become unsafely crowded on weekends through a combination of increased demand, closures and reduced hours, failure to enforce safety rules, and the general emergency conditions that…

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