#robotics Logs

Aug 23 2020

03:22 AM Jak_o_Shadows: Why didn't I put mounting holes in this PCB?
04:42 AM mrdata: because you want it to fly and be free?
04:42 AM mrdata: idk
06:18 AM Jak_o_Shadows: I think I didn't have much space
06:18 AM Jak_o_Shadows: cause all through hole
06:18 AM Jak_o_Shadows: but damn it was dumb
07:39 AM mrdata: you can route dadoes in the box
07:39 AM mrdata: oh he left
07:41 AM mrdata: or install pins
07:53 AM mrdata: https://en.wikipedia.org/wiki/Dado_(joinery)
11:54 AM rue_mohr: I use board clamps a lot, saves pcb
01:43 PM rue_mohr: who here has a bench power supply?
01:43 PM rue_mohr: a variable one
02:07 PM weyland|yutani: i gues a 30 buck one doesnt count
02:07 PM weyland|yutani: guess
02:12 PM rue_mohr: what kinda display does it have? or does it?
02:13 PM rue_mohr: I'm building one
02:13 PM rue_mohr: I"m having a problem selecting a display
02:13 PM rue_mohr: I have some neon ones, that are 200 lines over 10cm, which is better than anything else for resolution
02:14 PM rue_mohr: but their bar graph
02:14 PM mrdata: did you want red LED display or pixels
02:14 PM rue_mohr: I dont want digits
02:14 PM mrdata: no retro, then
02:14 PM rue_mohr: you cant see bumps and pulses in current
02:14 PM mrdata: hmm
02:15 PM rue_mohr: and if a load is pulsing, I need to be abel to see it
02:15 PM mrdata: i might use an oscilloscope for that
02:15 PM mrdata: but okay
02:15 PM rue_mohr: you can see pretty good detail just from analog meters
02:15 PM rue_mohr: but I'd like a different form factor
02:16 PM rue_mohr: current is less of an issue, the 200 elements have a resolution of 25mA/bar
02:17 PM rue_mohr: but 0.1V/line is bothering me for voltage
02:17 PM rue_mohr: honestly, I'd not see better resolution on an analog meter
02:17 PM rue_mohr: not over 20V
02:18 PM rue_mohr: often, analog meters give a faster reading than a digit display too
02:19 PM rue_mohr: there is nothing like waiting over half a second for a digit display to do its reading
02:20 PM mrdata: fast reading is good
02:20 PM rue_mohr: the neon displays are good
02:20 PM rue_mohr: 70Hz, 200 elements over 10cm, but they can only do bar mode
02:21 PM rue_mohr: they cant do dot mode
02:21 PM mrdata: you want a power indicator like you see on some audio amps? showing a bar graph
02:21 PM rue_mohr: yea, loooong and narrow
02:21 PM mrdata: those must exist for fairly cheap
02:21 PM rue_mohr: I want to go somewhere from 10cm to 12cm long
02:22 PM rue_mohr: no
02:22 PM rue_mohr: the ratio is wrong
02:22 PM rue_mohr: there are 256x64 oled modules, but their small
02:22 PM rue_mohr: like 5cm long
02:22 PM mrdata: hmm
02:22 PM rue_mohr: I'm pondering projected laser too
02:24 PM rue_mohr: I tried a galv based on a speaker last night, not enough deflection, I dont think mods would get it there nicely
02:25 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1297462494236155906
02:25 PM rue_mohr: if it'll load...
02:25 PM rue_mohr: the modified laser printer was working out nice
02:26 PM rue_mohr: the motor speed didn't want to behave tho
02:27 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1294114347283701760
04:33 PM polprog: rue_mohr: i was at the forest all day today
04:33 PM polprog: i need to get back on track with palasm..
04:34 PM Tom_L: if a tree fell in the forest and nobody was there, did it make any noise?
04:35 PM rue_mohr: as long as it didn't fall on polprog its ok
04:35 PM polprog: thanks for caring ;)
04:36 PM polprog: i think i saw tracks of a badger this morning
04:36 PM polprog: heavy, 5 claws
04:36 PM polprog: near a hole