Tag: Electronics

September 10, 2018 / / General Rambling
March 19, 2017 / / Coding
January 25, 2013 / / Projects
September 17, 2012 / / Electronics
July 9, 2012 / / Electronics

I just recently got a good deal on a second-hand Hantek DSO1060 – not the greatest scope in the world at 60MHz bandwidth/2ch/150MS/s (note: sub-nyquist for two channel). However, for what I paid, it was a darn good deal, especially since I don’t have a true DSO with your standard math functions (my main scope is the Tek 2221a, which has both analog and digital modes, where digital has none of the niceties like FFT/multiply/divide).

Coincidentally, I also just found myself building from spare parts, then trying to troubleshoot, a computer that happened to sporadically restart itself with no obvious cause. After loading the bios, then noticing odd case fan behavior where it would spool up and down over and over, then noticing the BIOS reporting highly unstable voltages, I started suspecting the power supply. And out came the DSO1060!

November 29, 2011 / / Electronics
Eagle parts!

I finally got around to putting my personal Eagle parts library on Github. There’s not much else to it, find it here here. The most noteworthy thing in there is the SOT223-5 footprint, which I couldn’t find anywhere online or in the default libraries. Enjoy! Complete listing below.

November 28, 2011 / / Electronics
USB IR Toy v3

I got the USB IR Toy v3 as a free PCB from Dangerous Prototypes a few weeks back, but until recently I haven’t had much time to track down all the parts for it. Given that this is a v3 and not a v2, there isn’t a simple shopping cart of parts at Mouser kicking around. So, I decided to make one!

August 14, 2010 / / Electronics
front view
My custom board

A few people asked about this. I’ve seen breadboards with binding posts before, but usually they’re nothing special, just some banana plugs near the board that you can screw a jumper wire into. I wanted something a little more full featured, so I whipped this up.

August 12, 2010 / / Electronics
Bulbdial clock with breadboard and multimeter
Let’s make it touch sensitive!

UPDATE: People keep asking about the breadboard setup. Fair enough. I’ll throw together a quick overview when I get home today.
UPDATE: here it is: http://www.alexwhittemore.com/?p=462

The Bulbdial clock from Evil Mad Scientist is probably the coolest clock idea I’ve ever seen. Even cooler are my parents, who got the kit for my birthday.  The basic idea is that three rings of LEDs cast shadows onto a clock face to form H/M/S hands, somewhat like a sundial, with the hands slowly animating around. A lot of thought clearly went into making this kit, and it’s very nicely done, but there’s a major drawback: I want to use it on my bed side table, where I usually keep a clock, but it’s too bright for me to fall asleep! Of course, that’s been thought of too: in the normal view mode, the three buttons at the bottom of the clock are brightness up, down, and “mute,” which turns off the LEDs entirely. But they’re hard to get to buried underneath the frame of the clock, and it makes muting the display cumbersome in the dark. Let’s fix that!

August 11, 2010 / / Electronics
Crappy Buds
Crappy Buds

Say what you will, but iPhones are pretty awesome, and so are the headsets that come with them. At least up until you put them in your ears. The inline controls are awesome, but the speakers are uncomfortable, lacking in low end punch, and do nothing for sound isolation. Other, much better headphones exist, but for under a gajillion dollars, none come with the same kind of inline controls. Here’s how to have the best of both worlds.