#robotics Logs

Sep 12 2015

07:32 veverak any tips for i2c temp sensor?
07:45 deshipu what range?
07:45 veverak 20 - 125c ?
07:45 veverak ok
07:45 veverak to be more precise
07:46 deshipu no, don't be precise, keep us guessing
07:46 veverak i want to use up to 13 temp sensors, 8 voltage sensors, and at least 4 pwm outputs
07:46 veverak ideally on one arduino
07:46 veverak :)
07:46 deshipu by voltage sensors you mean ADC?
07:46 veverak yeah
07:46 veverak 5 and 12 V
07:47 veverak oh, I liead
07:47 veverak *lied
07:47 veverak one arduino or network of multiple ones
07:47 veverak or something else entirely...
07:48 deshipu well, an arduino has 8 ADC inputs and 6 PWM outputs, the problem is, I²C is on two of the ADC inputs
07:48 veverak hmm
07:48 veverak well I suppose I could make it 6 voltage sensors
07:48 veverak nah
07:48 veverak deshipu: as I thinkg about it, scalable arduino network would be propably better idea
07:48 deshipu maybe spi? spi would only use 2 of your PWM outputs
07:49 veverak if I figure out how to make it moer "sane"
07:49 veverak deshipu: you mean to use spi for temp sensors?
07:49 deshipu yeah
07:49 veverak I would guess that spi sensors would be expensive?
07:49 deshipu well, then you would need chip enable for each sensor
07:49 deshipu forget it
07:50 deshipu but
07:50 deshipu you can put everything on i2c
07:50 deshipu and have i2c adc
07:50 veverak yeah
07:50 veverak only problem is that local shop got only i2c sensors, that are limited to 8 devices
07:50 veverak (sucks hard)
07:51 veverak but, if I would use one-wire/adc temp sensors on multiple arduinos that are connected via i2c
07:51 veverak that could work :
07:51 veverak :)
07:51 deshipu so, software i2c for the sensors, and hardware for communicating between the arduinos?
07:51 deshipu what are you making, btw?
07:52 veverak reprap upgrades
07:52 deshipu bleh
07:52 veverak temp/voltage sensor for each stepper driver
07:52 veverak and temp sensors for box I have reprap in
07:52 veverak :)
07:52 veverak which reminds me that multiple arduinos will be much better
07:52 veverak less "kilometers" of wires
07:53 deshipu I would just use a cheap analog sensor and an arduino per motor
07:53 veverak yeah, seems more legit
07:53 veverak also there is 0.5m space between "electronics box" and "box with 3d printer"
07:54 veverak + multiple arduinos means that I don't have to do everything at once, but add one arduino per week or something like that
07:54 deshipu have you seen the wearable 3d printer? :)
07:54 veverak do I want to?
07:55 veverak nah
07:55 veverak don't want to
07:55 verak just spent week working on 3d printers for his
07:55 deshipu it's a hat
07:55 veverak less 3d printers today I suppose
07:55 deshipu fewer
07:55 deshipu I have a filter on '3d print' and 'drone'
07:56 veverak :D :D :D
07:56 deshipu two aspects of the maker culture that I avoid
07:56 veverak you filtered bigger half of hw-hackers community!
07:56 veverak :D
07:56 veverak http://www.hwkitchen.com/products/freaduino-pro-328-5v-16mhz/ looks awesome
07:56 veverak allready used that
07:56 deshipu white, nice
07:57 deshipu do they have 8Mhz version?
07:57 veverak I don't think so
07:58 deshipu sad panda
07:58 veverak http://www.elecfreaks.com/store/freaduino-uno-rev18-mbefuno-p-414.html
07:58 veverak but I like this modification of uno
07:59 deshipu http://www.hwkitchen.com/products/netduino-mini/
07:59 deshipu wow
08:00 veverak nah
08:00 veverak .NET
08:00 verak r
08:00 veverak *runs
08:00 veverak wait a moment
08:00 veverak 2 uarts?
08:00 verak runs
08:01 deshipu wonder if it would run micropython
08:01 deshipu veverak: well, if you want 2 uarts, get a teensy lc :)
08:01 deshipu it has 3
08:02 veverak it uses standart C to program I suppose?
08:02 deshipu you can use arduino ide or standard C
08:03 veverak hmm
08:03 verak hates arduino ide but likes it's lang
08:03 veverak but I suppose my C-fu should be high enough to make things
08:03 veverak just never did it, so I suppose it would be a lot of fails before good one :)
08:03 deshipu most arduino sketches work
08:03 deshipu it also has a DAC
08:03 deshipu so you can generate sounds :)
08:03 veverak :D
08:04 veverak deshipu: I hate you
08:04 veverak teensy looks really really nice
08:05 deshipu oh, but 3.3V only!
08:05 veverak yeah
08:05 deshipu as all arms
08:05 veverak but I allready accepted that one simply can't have 5V everywhere
08:05 veverak as one simply can't walk into mordor
08:07 deshipu I prefer 3.3V anyways
08:07 deshipu stuff that requires 5V is a pain
08:07 deshipu mostly the distance sensors
08:08 veverak :)
08:09 deshipu I have a teensy LC and I need to try to make it work with Tote
08:09 veverak nah
08:09 veverak forgot
08:09 veverak forgot
08:09 veverak you got enough projects allready
08:09 veverak don't make another one
08:09 veverak forgot
08:09 veverak forgot
08:09 veverak yeah, now I am OK :)
08:09 deshipu since it has lots of analog inputs too, I can do the full force sensing
08:09 veverak http://www.hwkitchen.com/products/arduino-pro-328-5v-16mhz/
08:09 veverak also looks nice for my usage
08:10 veverak http://www.hwkitchen.com/products/arduino-pro-mini-328-5v-16mhz/ propably better
08:12 deshipu http://www.aliexpress.com/item/Free-Shipping-10PCS-LOT-Pro-Mini-Atmega328-3-3v-8MHz-For-Arduino-Compatible-nano-uno/1803160088.html
08:12 deshipu veverak: for that price you can have a teensy-lc
08:13 elektrinis-hme omg
08:13 veverak yeah
08:13 elektrinis-hme 1.5€/pc?
08:13 veverak but arduinos are easy to get everyday
08:13 deshipu elektrinis-hme: sure, welcome to China :)
08:13 elektrinis-hme counterfeit atmega?
08:15 veverak http://www.aliexpress.com/item/Free-Shipping-new-version-50pcs-lot-QFN-Pro-Mini-328-Mini-ATMEGA328-ATMEGA328P-MU-3-3V/2014790278.html
08:15 veverak even better
08:15 deshipu elektrinis-hme: not really, atmegas are cheap
08:15 deshipu more like sweatshop assembly and no QA
08:16 deshipu one or two from those 10 may be faulty
08:17 veverak hmm
08:17 veverak I will see
08:17 veverak :)
08:18 deshipu personally I have no problems with them
08:19 veverak they are small
08:19 veverak but nah
08:19 veverak no holes for screws
08:19 veverak will have to print something for them
08:19 deshipu make some :D
08:20 deshipu enlarge the holes that you don't use ;)
08:20 deshipu veverak: they fit into a dip600 poackage
08:20 deshipu package
08:21 veverak http://www.thingiverse.com/thing:24611
08:21 veverak xaxaxa
08:21 veverak :)
08:22 deshipu I don't even...
08:24 deshipu veverak: http://www.aliexpress.com/item/5-Pcs-24-Pins-Black-for-I-C-Socket-DIP-Sockets-Adaptor-Round-Hole-Type-Machine/32340484749.html
08:24 deshipu funny how they are more expensive than the pro mini ;)
08:24 veverak :)
08:25 veverak now
08:25 veverak I start to be really glad
08:25 veverak that I installed ticket system for this stuff
08:25 veverak so many things somebody recommends me that I usually forgot
08:27 deshipu http://www.aliexpress.com/item/100pcs-24Pin-DIP-SIP-IC-Sockets-Adaptor-Solder-Type-Wide/2052946412.html
08:27 deshipu that's better
08:32 deshipu here you have 10 http://www.aliexpress.com/item/10pcs-24Pin-DIP-SIP-IC-Sockets-Adaptor-Solder-Type-Wide/610777120.html
12:12 rue_house ok
19:31 ace4016 hrm...think it's a bad idea to use an airbrush nozzle as a fuel oil nozzle? :P
20:11 Hyratel1 ace4016, what kind of airbrush?
20:12 Hyratel1 is it a coaxial venturi, or a whistle?
20:13 ace4016 no idea; i don't know what type of nozzles airbrushes use, but i know they're low flow, high velocity
20:13 ace4016 and i need something along the lines of a .25 gph flow nozzle, preferably at high velocity
20:13 ace4016 can't seem to find one
20:15 Hyratel1 http://www.harborfreight.com/deluxe-airbrush-kit-95810.html
20:15 Hyratel1 this is a venturi style
20:16 Hyratel1 http://www.harborfreight.com/quick-change-airbrush-kit-93506.html
20:16 Hyratel1 this is what I call a "whistle" style
20:17 Hyratel1 ace4016,
20:22 ace4016 hrm, as long as the venturi nozzle can spit out fuel without air being used (just shove the oil through with a pump), then the venturi might be what i'm looking for, i think
20:23 ace4016 assuming it has enough capacity to obtain .25 gph (maybe a few nozzles...)
20:29 ace4016 doesn't need to be an airbrush nozzle; just trying to find high velocity, low flow (.25, though if it's higher flow, that's fine; i can pulse fire)
21:34 Hyratel1 ace4016, those are both types of venturi,not spraynozzles
21:34 ace4016 ah
21:34 Hyratel1 they use airstream to collect and flow the material
21:40 ace4016 guess i'll stick with oil burner nozzles
21:41 ace4016 they don't advertise stream velocity :P