#garfield Logs

Aug 10 2020

12:14 AM zhanx_workshop: x11
12:20 AM zhanx_workshop: turn it up to 11 always
12:20 AM zhanx_workshop: but really if the knob registers as a button. 1x 10x 100x
12:20 AM zhanx_workshop: cycle it
12:21 AM rue_shop2: hmm
12:22 AM rue_shop2: that could get annoying with bounce
12:22 AM rue_shop2: I have no indicators to tell you what its doing otherwise
12:22 AM zhanx_workshop: add some leds
12:22 AM zhanx_workshop: green yellow red
12:22 AM rue_shop2: cant out of io
12:23 AM rue_shop2: this is a super simple digital pot
12:23 AM zhanx_workshop: charlieplex
12:23 AM zhanx_workshop: ?
12:23 AM rue_shop2: a tiny13 bridges from an encoder to a DAC
12:23 AM zhanx_workshop: k
12:23 AM rue_shop2: the idea is drop-in replacement for a voltage divider
12:29 AM rue_shop1: using 2 of them for control refs for a bench power supply
12:29 AM rue_shop1: a *simple* one
12:29 AM rue_shop2: cause, heaven forbid this get complex like the one I started 5 years ago
12:30 AM zhanx_workshop: lol
12:31 AM rue_shop1: 20 seems like a good ratio
12:31 AM rue_shop1: 20 turns to get thru full range is annoying
12:31 AM rue_shop1: then, pushed in, 1 turn for full range
12:32 AM rue_shop1: but 20 is a good fine adjust speed
12:32 AM zhanx_workshop: 10 so you are not twisting so much? or do you need it that fine?
12:33 AM rue_mohr: so
12:34 AM rue_mohr: I have it so that, when pushed in, its 1 turn from 0-100%
12:34 AM rue_mohr: without being pushed in, its 20 turns 0-100%
12:34 AM rue_mohr: ?
12:34 AM rue_mohr: it also means its harder to accidently slip by a large div when releasing the button
12:35 AM rue_mohr: if that makes sense
12:35 AM rue_mohr: I should make some knobs with toms wheels, these china ones are 20 divisions, which is annoying for binary math
02:48 AM polprog: oh boy that webpage
02:49 AM polprog: i dont believe it, every request shows a Last-Modified from 2020. they made it just months ago
02:49 AM polprog: Server: Apache/2.2.11 (Win32) PHP/5.3.0
02:50 AM polprog: all i can say that wasnt a garden variety newb
02:50 AM polprog: ok, time to make the transistor tester
02:50 AM polprog: where do i keep the rocker?
03:18 AM polprog: it works well
04:10 AM polprog: https://polprog.net/rozne1/ircjunk/tpairtester/
03:13 PM polprog: rue_mohr: i tried my hand at smelting aluminum two years ago, this is what i got
03:14 PM polprog: https://polprog.net/rozne1/ircjunk/various/alu1.jpeg
03:45 PM Tom_L: that's art
03:46 PM polprog: thats what you get for not having a crucible
03:46 PM polprog: but im pretty sure because it all flown down between the coals, it didnt oxidize entirely
03:52 PM polprog: https://polprog.net/rozne1/ircjunk/cardputer/
03:53 PM polprog: the tiny backplane finally came handy
03:53 PM polprog: despite the weird proprietiary connector it has a normal ISA bus
07:00 PM rue_mohr: huh
08:51 PM ShopMoon: rue_mohr: CW transmitter???
08:51 PM ShopMoon: whats that?
09:03 PM rue_mohr: transciever
09:03 PM rue_mohr: cb
09:09 PM zhanx_workshop: with a thermal difference of 2x temp i pull a .9 percent expansion rate . which results in .25 liters of water moving
09:10 PM zhanx_workshop: my heat exchanger is not installed either
09:10 PM rue_mohr: ok
09:10 PM rue_mohr: pump or AC?
09:11 PM zhanx_workshop: solar with no panels and 2 check valves
09:11 PM rue_mohr: yep
09:12 PM rue_mohr: I thought you were going to do a big pneumatic thermal tank that generated suction/pressure over the course of the day
09:12 PM zhanx_workshop: once i get the heat exchanger working
09:12 PM zhanx_workshop: that is the goal
09:12 PM rue_mohr: I wonder if a person could almost design something like a stirrling engine
09:13 PM zhanx_workshop: it is
09:13 PM rue_mohr: and use the peak of the heating cycle to push water over the collector and cause a chilling cycle
09:14 PM rue_mohr: so, whats your design look like then?
09:14 PM rue_mohr: whats the difference in air volume between day 20c and 40c
09:15 PM rue_mohr: maybe more than 40...
09:15 PM zhanx_workshop: .9
09:15 PM rue_mohr: hey I think my brain turned on
09:15 PM rue_mohr: really!?
09:15 PM rue_mohr: oh
09:15 PM zhanx_workshop: its a small unit
09:15 PM rue_mohr: wait you mean 10% delta
09:15 PM zhanx_workshop: 9%
09:16 PM rue_mohr: ok, so if I had a piece of 4" PVC that was 20 feet long
09:16 PM zhanx_workshop: food time hold the thought and yes
09:17 PM rue_mohr: 49.42L
09:17 PM rue_mohr: so the air would cycle from that to...
09:18 PM rue_mohr: 44.48L?
09:18 PM rue_mohr: delta
09:18 PM rue_mohr: 5L
09:18 PM rue_mohr: ?
09:22 PM rue_mohr: kinda sucks
09:22 PM rue_mohr: you need something that state changes at about 30c
10:14 PM zhanx_workshop: rue_mohr, adding solar reflectors to generate more heat
10:15 PM zhanx_workshop: reminder its hot in texas
10:56 PM zhanx_workshop: rue_mohr, its working thats all that counts
11:20 PM rue_shop1: I'm thinking here
11:23 PM zhanx_workshop: rue its a sterling engine for sure
11:24 PM rue_mohr: cooled by the water it pumps?
11:24 PM zhanx_workshop: yes
11:24 PM rue_mohr: stronger faster harder
11:26 PM zhanx_workshop: yep
11:26 PM zhanx_workshop: i wonder if i can get it to prime the well
11:26 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1293040435246424064/photo/1
11:26 PM rue_mohr: got a kit today
11:26 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1293040186272575488/photo/1
11:26 PM rue_mohr: well, two
11:27 PM zhanx_workshop: its that a lathe?
11:27 PM rue_mohr: steam engine
11:29 PM zhanx_workshop: oh welding hood didnt charge will try new batteries
11:29 PM rue_mohr: one of the guys I know what clearing a shed
11:29 PM rue_mohr: so I didn't say no
11:29 PM zhanx_workshop: i wouldn't either
11:29 PM rue_mohr: oh polprog I got a CF of that made
11:29 PM rue_mohr: ok, I need to start supper and make a regulator circuit