Profile

Cover photo
John Bump
Works at Texas Instruments
Attended Reed College
Lived in denver
4,225 followers|382,130 views
AboutPostsPhotosVideosReviews

Stream

John Bump

Shared publicly  - 
 
man debugging V4 of the previously mentioned tachometer is tricky when both my power supplies decide to go insane.  One suddenly is a jagged not-very-DC 22V rather than its rated 12V, which is bad for linear regulators; the other suddenly decided to only supply 10 milliamps when it's on the 500mA range.  Now I have a bunch of cooked semiconductors.  This is why you test the power section of a board before connecting it or loading the expensive parts, which thankfully are still sitting in bags.  V4 adds jumpers so the user can specify how many interrupts per revolution to count.  Now it'll react rapidly to 10 rpm, as well as managing to count 230,000 rpm.
1
Dave Smith's profile photo
 
Automotive electrics is a very noisy, spiky world anyway so consider your duff power supplies as a design stress test.
Add a comment...

John Bump

Shared publicly  - 
 
A friend gave me a working, albeit aged, ultrasonic cleaner today!
It is NOT large enough to put your head in.  Sorry, people who are into that.  It IS large enough to start running lots of bike and car parts through.  Wheee!  I've always wanted one.
4
Chris Hoover's profile photoAdam Pressler's profile photoLynne Watanabe's profile photoJohn Bump's profile photo
7 comments
 
+Chris Hoover Only if they survived
Add a comment...

John Bump

Shared publicly  - 
 
A particularly clever hack.
 
I2C from the VGA port on a laptop, yes it definitely works.
20
2
Josh Rhodes's profile photoAaron Stemple's profile photoMongrel Shark's profile photo
2 comments
 
Isn't it?
Add a comment...

John Bump

Shared publicly  - 
 
Dave Brubeck having a great time in a live performance from 1959.  It's interesting to watch his hands.  It's also interesting that until they go off on an improv stretch it sounds almost identical to the studio version of the song.  They didn't need much cleanup.
Dave Brubeck Quartet - "Blue Rondo à la Turk," live
13
jon sanford's profile photoDavid Bump's profile photoJean Bump's profile photo
6 comments
 
+jon sanford
I missed the pot thing=I was a psychology/history/education major, and all my classmates were pretty square.  I knew the kids in the Greek houses, however, and this looks like them.
Add a comment...

John Bump

Shared publicly  - 
 
Jolie Holland just released a song from her new album.  It's quite a different sound from her previous folk blues.
Jolie Holland - "Dark Days"
3
Aaron Stemple's profile photoJohn Bump's profile photo
6 comments
 
I was thinking of when I've seen her in concert.  She may have gotten studio musicians for both the youtube pieces.
Add a comment...
Have him in circles
4,225 people
 
#cleanallthethings  ultrasonic edition: four rings, a piece of cnc aluminum, a 1981 campy super record front derailleur, and the choke plate from a 1971 datsun 1200, so far.  All look superb now.  (The front derailleur looks more record than superbe, actually.)  (vintage bike parts pun.)
2
Aaron Stemple's profile photoJohn Bump's profile photo
2 comments
 
You and me both.  You can crack teeth and dislodge fillings that way.
Add a comment...

John Bump

Shared publicly  - 
 
PSA as a result of a convo in +steph wanamaker's stream about the "G+ is dead" meme: I'm getting about 500 new posts per hour, of which about 80% are interesting enough that I want to respond or should read the links before commenting.  As such, I simply can't read everything.  If you've posted something you want me to see, tag me.  Otherwise I'm unlikely to see it.  Which is to say: thank goodness it's a ghost town, because it's already too busy.
6
1
steph wanamaker's profile photoHo Liu's profile photoAaron Stemple's profile photoJohn Bump's profile photo
8 comments
 
+Ho Liu
Oh i have them there and that is the only way i get the posts.. and there are still people who dont make their way into my stream.
Add a comment...

John Bump

Shared publicly  - 
 
Erroll Garner, who played purely by sound, having a great time at a keyboard some time in the 1950's.  Erroll Garner "I get a kick out of you"
4
David Bump's profile photo
 
Awesome.  And something I don't have in my collection, either.
Add a comment...

John Bump

Shared publicly  - 
 
This album just came out and I like it, but particularly this song, which unfortunately I can't find on youtube.  http://www.last.fm/music/Thus+Owls/_/A+Windful+Of+Screams
1
اسامه عبد المنعم's profile photoAaron Stemple's profile photoJohn Bump's profile photo
3 comments
Add a comment...

John Bump

Shared publicly  - 
 
The Pixies managed to crank out a seriously good album, much better than I'd expected.  Frank's voice sounds 20 years younger.
9
Add a comment...
People
Have him in circles
4,225 people
Work
Occupation
electron wrangler
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
Links
Contributor to
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 - 8 months ago
reviewed 8 months ago
1 review
Map
Map
Map