#garfield Logs

May 06 2020

02:17 AM rue_mohr: 5 lobe encoder
02:23 AM rue_mohr: so, edge every 72 degrees
02:23 AM rue_mohr: a counter clocked at 390625 Hz
02:23 AM rue_mohr: RPM = ?/counts*?
11:21 AM aandrew: Fizzbuzz is my favourite interview question. Easily filters out those who can’t think logically. Didn’t have to be a real program, just on whiteboard in pseudo code
11:30 AM polprog: im against whiteboard interviews but a general "show me how a Fizz Buzz program would work" is a very good question
03:21 PM polprog: https://www.edn.com/wp-content/uploads/contenteetimes-images-edncollections-jim-williams-lab-20070323.jpg
04:23 PM aandrew: polprog: yep, I actually met Bob Pease many many years ago
04:24 PM aandrew: turned out I was at the same hotel as him, and we drank a bunch of apricot brandy and chatted. I'm not sure how much HE got out of the exchange but it was a pretty amazing time
04:25 PM aandrew: dude had an entourage of National employees whose sole job was to get him absolutely anything he wanted and make sure he didn't get killed
04:30 PM polprog: >Pease was killed in the crash of his 1969 Volkswagen Beetle, on June 18, 2011.[25][26][27] He was leaving a gathering in memory of Jim Williams, who was another well-known analog circuit designer, a technical author, and a renowned staff engineer working at Linear Technology. Pease was 70 years old, and was survived by his wife, two sons, and three grandchildren.[27] The sudden death of Pease triggered
04:30 PM polprog: a small flood of remembrances and tributes from fellow technical writers, practicing engineers, and electronics hardware hacking enthusiasts.[22][25][28][29][30]
04:31 PM polprog: oh god.. thats unfortunate
04:31 PM polprog: must have been a great meet
04:31 PM rue_mohr: polprog, OMG
04:31 PM rue_mohr: my lab is in, like 3x better state than that guys!!!
04:31 PM polprog: yeah
04:32 PM polprog: i cleaned up mine for the livestream
04:32 PM rue_mohr: YES I'v not got the worst mess!
04:32 PM polprog: and couldnt find the kit i was going to use
04:32 PM polprog: clean desk is a sign of dirty mind :v
04:32 PM * polprog goes to get some more udon from the box
04:33 PM rue_mohr: so, on the drive to work I came up with that new circuit
04:34 PM rue_mohr: so, that desk is EXACTLY why decade boxes are important!
04:34 PM rue_mohr: he must have almost as many components on that bench as I have in my stocks
04:34 PM rue_mohr: along with what looks like a lot of teardown pcb's which I find odd
04:35 PM Tom_L: easier to reach
04:35 PM rue_mohr: well, I feel I'm doing ok now
04:36 PM rue_mohr: the main part of my realization was how to make an oscillator with 3 parts that had an open collector output that I could OR with a voltage feedback signal
04:36 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1258050190377807872/photo/1
04:36 PM rue_mohr: that occured to me on the drive to work
04:39 PM Tom_L: it occured to me not to go to work on the drive to work but i went anyway
04:40 PM polprog: nice
05:38 PM polprog: goodnight
05:38 PM aandrew: polprog: yes, it's sad how the newspaper described him too, just "an elderly man" :-(
05:39 PM polprog: :/
05:39 PM polprog: shame
07:13 PM rue_shop1: it works :)
07:13 PM rue_shop1: had to add a few more parts tho
10:26 PM rue_shop1: so, I'm executing 2 forks on the decade box
10:26 PM rue_shop1: one fork is gathering mechanical switches
10:26 PM rue_shop1: small, 10 position ones...
10:26 PM rue_shop1: the other fork is gathering parts for the digital one
10:27 PM rue_shop1: there was a nice argument for the digital one, I can have it walk "any" value, OR set it to walk standard values
10:27 PM rue_shop1: AND I can choose the standard
10:27 PM rue_shop1: which brings up interface change requests
10:28 PM rue_shop1: as at that point I'm getting into some menus
10:35 PM Tom_L: what's it for?
10:54 PM rue_shop1: so, when I'm building the circuits like I been doing latley
10:54 PM rue_shop1: I need to hunt resistor values
10:54 PM rue_shop1: aka, find the sweet spot
10:55 PM rue_shop1: or, sometimes, even the ballpark
10:55 PM rue_shop1: having a large bin or random resistors takes me a while
10:55 PM rue_shop1: so I want to make a resistor box
10:55 PM rue_shop1: that I can dial in the resistance
10:55 PM rue_shop1: but, I want a digital one
10:55 PM rue_shop1: with dual outputs
10:56 PM rue_shop1: and changable resistors
10:56 PM rue_shop1: that fits in a 1U box
10:56 PM rue_shop1: and has usb control
10:56 PM rue_shop1: maybe a VFD screen
10:57 PM Tom_L: fancy
10:57 PM rue_shop1: yea
10:57 PM rue_shop1: too fancy
10:58 PM rue_shop1: thats why I'm also gathering switches for a machanical one
10:58 PM rue_shop1: 6 pots, all on a big ass geared gang shaft, with a 6 position selector
10:58 PM rue_shop1: but my gear library accidently got cleared out with a machine reinstall
10:59 PM rue_shop1: might have a copy of it, but it needed a redo anyhow
10:59 PM rue_shop1: so...
10:59 PM rue_shop1: battle of the rues
11:00 PM rue_shop1: the motor driver thing is going really well tho
11:00 PM rue_shop1: I'm learning lots for the big CNC motor driver
11:37 PM rue_mohr: hahah I started the tilt and pan mirror in 2012
11:37 PM rue_mohr: damn