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John Bump
Works at Texas Instruments
Attended Reed College
Lived in denver
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John Bump

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Anyone have any experience writing hardware interrupts from pci cards under visual c++ on XP? Is this an overwhelmingly huge project for someone with very little windows programming experience?
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Evan Brody's profile photoThomas Scoville's profile photoJohn Bump's profile photo
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(I'd have to use a Beaglebone anyway, given where I work, although that's not a bad thing.)
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John Bump

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Many cyclists use Garmin bike computers, because they integrate gps, heart rate monitor, cadence, and power information and record it all so we can look at it later. If your bike falls over with the garmin on the handlebars, the two tiny plastic mounting tabs on the back break off. Then you end up rubber-banding it onto the mount, or buying a $70 new back plate for it, or giving it to a handy friend to fix. This is how I acquired mine, and now another friend has had the same thing happen. Insofar as I have a system to fix them, I ran his through. (Note that since I first started doing these, people have come up with other commercially available repairs.)
So, picture of what the tabs are supposed to look like, picture of his broken one, the cnc mill cutting a dovetailed slot in wood as a test run, cutting a dovetailed slot in the back of his computer, brass strip the same thickness as the tabs with a new tab-shaped recess cut in it, then a couple of the final fitting. I had to hand-file 60 degree dovetail angles on the edges and countersink the 1-72 screwheads, both of which were a pain, but not half as much of a pain as trying to get 1-72 nuts onto the screws, with a bit of epoxy making everything sticky. That required two sets of tweezers under a microscope.
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Eto Demerze's profile photoChris Davies (cd34)'s profile photoJohn Bump's profile photoDavid Bump's profile photo
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The dogearsgps is a great solution, but auto-play video--argh. Especially since that video, on my speakers, sounded exactly like a hard drive failing in spindle-tap mode.
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John Bump

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and this is my second favorite new (ish) music.
https://www.youtube.com/watch?v=PDA6-kIdldA
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I <3 <3 <3 her voice.
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John Bump

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As regards new music and record stores, this is my current favorite new music.
https://www.youtube.com/watch?v=fr2pdwhjtjU
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Thomas Scoville's profile photoJohn Bump's profile photo
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Bowie was definitely who I was thinking of, but I can see the others now that you mention it.
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John Bump

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I can't resist this.
 
+John Bump​
Gravity Lens @Gravity_Lens. @mathemaniac That joke is not going to get a reactive response, but there will be some real impedance. Daniel Dippold · 11h11 hours ago. Daniel Dippold @DaniDipp. @mathemaniac Please explain. I know what a voltage divider is, but I haven't heard of "Thunder Ohm" D: ...
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John Dempsey's profile photoBrian Holt Hawthorne's profile photoMartin Andersen's profile photoCurtis Edenfield's profile photo
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Seriously! LMAO!
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John Bump

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For the LambdaMOO people out there, Loree just posted elsewhere that Dagard passed away yesterday.  I don't know anything more than that.
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John Bump

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Pokemon Go updates: 1, battery save mode is almost totally awesome. Turn it on in PG, and when you hold the phone upside-down it turns off the screen and stops rendering graphics, but still tracks and alerts. Except sometimes it crashes if your phone goes long enough to engage screen lock. 2: downloading maps and using them offline. Some people say this works, one google engineer says it doesn't. I've done it, but haven't yet noticed any difference in bandwidth usage, so I'm dubious. Sorry to make this public but a ton of people are talking about these.
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Sean Lally's profile photoMichael Rutherford's profile photoRichard Masoner's profile photoThomas Scoville's profile photo
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About two years ago, one of the maker-associated websites, like hackaday or make magazine, posted a link to a series of 15-20 videos made by this inventor who'd made close to a billion dollars inventing and producing medical equipment. The videos were on fast, effective prototyping. Specifically, one was about using laser/waterjets to cut precise micropositioning equipment out of metal sheet by cutting interdigitated slits to allow the metal to flex. Anyone familiar with this?
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John Bump's profile photoEto Demerze's profile photoJoe Beam's profile photo
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is it possible that there is a maker space that will have those ?
Or a shop that will do the cuts for you? at a price of course.
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John Bump

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Hey machinist friends. I'm routing out stuff from flat aluminum stock, so I'm slotting through it with an end mill. I don't care about the slot width, only the dimensional accuracy of one side. What width cutter should I use? Larger cutters are stronger, smaller cutters mean less material removal. What optimization strategy do you choose? (Cheapest endmill? Whatever endmill you have? are both reasonable answers.)
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John Bump's profile photoJustin Mann's profile photo
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most of the speed/feed stuff is done by feel and/or experience. there are equations to get you close but lots of variables from there. i have always adjusted based on sound. there is a particular sound when a cutter is running right. i will admit though, that technique goes south fast when using mills smaller than .062"!!!
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Lunchtime ride.  I gained 2kg in the last week or so because the weather hasn't been riding-conducive, which converted me from able-to-draft-the-lead-climbers-up-the-hill to struggling-to-stay-midpack.  But I didn't get dropped.  Right near the end of the 35k, the ride turned into a sprint.  I hit a slight pothole and heard a dink!dink!dink! sound, assumed I'd broken a spoke.  Worse: I tore the hub flange off.  I <3 my American Classic wheels: half the price of other similar-weight wheels and easy to find repair parts for.  But, apparently, a bit too lightly built.  (Though, at 30,000 miles, still pretty satisfactory.)
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Daniel D's profile photoJohn Bump's profile photoRobert Clark's profile photo
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+John Bump I like high flange hubs. They add even more.
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While we're doing electronics jokes...
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Larry Maxwell's profile photoSteve Case's profile photoLynne Watanabe's profile photo
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Yes!! It was you!! Lol~~~~!!
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Work
Occupation
electron wrangler
Skills
armor, bikes, chemistry, desiterata, engineering, fencing, gizmology, house repair, injuries &c.
Employment
  • Texas Instruments
    present
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Previously
denver - loveland colorado - leadville colorado - portland oregon - seattle washington - boise idaho - fort collins colorado - eugene oregon
Story
Tagline
Mad scientist
Introduction
John, aka Random, aka smellsofbikes, aka several other things.
Bragging rights
Mad scientist. Not crabby, just at an oblique angle to reality.
Education
  • Reed College
    chemistry, 1986 - 1988
Basic Information
Gender
Male
Relationship
Married
Other names
Random, smellsofbikes, jens, solipsist
They had what I needed, found and brought it out fairly promptly, and helped me load it. They have a great assortment of wood and hardware besides.
Public - 3 years ago
reviewed 3 years ago
1 review
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