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I found this great Instructable on how to burn down my house, with neat MQTT integration so I can start a fire directly from OpenHAB: https://www.instructables.com/id/Motorized-WiFi-IKEA-Roller-Blind/ https://www.youtube.com/watch?v=eOE7pMF-ScY A capacitor shorted out 9V to ground while I was asleep and burned the tracks right off the PCB, leaving nice deep scorch marks on my wall. I love waking up to the smell of burnt electronics.    Home automation is great, just make sure your home is non-flammable I guess.
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Jul 9, 2017 11:20
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turns out being good at touching computers doesn't make a good electrical engineer
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Jul 9, 2017 12:24
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9 volts?
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Jul 9, 2017 16:45
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is there something like shenzhen io but for real electronics? i want virtual electronics that i can gently caress around without spending $$$$$$$ and waiting weeks upon weeks for parts.
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Jul 9, 2017 16:51
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Shinku ABOOKEN posted:is there something like shenzhen io but for real electronics? i want virtual electronics that i can gently caress around without spending $$$$$$$ and waiting weeks upon weeks for parts. your own imagination
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Jul 9, 2017 16:51
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hifi posted:your own imagination my imagination cant do all the formulas and poo poo friend. also my imagination doesnt have a catalog of parts to explore (<<< exploration is what i'm after).
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Jul 9, 2017 16:53
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The esp8266 runs on 3.3v but the nodemcu board has a regulator on it so in theory it should handle 9-10v. The motor isn't strong enough to lift the blind at 5V. The datasheet for the L293DD says the max input voltage for control is 7V though so 9V for everything was a bad idea. I think the main problem is that there's no fuse anywhere in the circuit to prevent the magic smoke from escaping Attempt two has a buck converter set to 5V, maybe this time it won't catch on fire  
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Jul 9, 2017 17:03
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r u ready to WALK posted:The esp8266 runs on 3.3v but the nodemcu board has a regulator on it so in theory it should handle 9-10v. The motor isn't strong enough to lift the blind at 5V. put it in a metal junction box or project box not a 3d printed case you idiot
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Jul 9, 2017 17:19
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why can't you just get up and close the blinds s yourself They're right there just walk over and close it
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Jul 9, 2017 17:31
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Look at this guy, I bet your blinds don't even have an IP address Shameful (the plan is to build 9 more of these once I'm less incompetent at electronics)
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Jul 9, 2017 17:41
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Shinku ABOOKEN posted:is there something like shenzhen io but for real electronics? i want virtual electronics that i can gently caress around without spending $$$$$$$ and waiting weeks upon weeks for parts. yes, but it is hella expensive the grand daddy of them all is cadence orcad/pspice. it's windows-only and costs a couple grand. it is, underneath the covers, derived from a 1980s version of SPICE, the original circuit simulator. it is not particularly easy to use unless you got a lot of time to learn it there used to be a much more affordable circuit sim lacking the board layout tools and poo poo sold by national instruments, called "electronics workbench," but i can't seem to find it on their website anymore. they only have references to their professional product, multisim. this poo poo is also derived from SPICE. the el cheapo academic version was very easy to use but pretty limited in what it could do beyond simple simulation on the open source side, you can use geda + old school 1980s open source SPICE together. this is not a real nice experience. geda is fine as a design tool to lay out schematics but it is not v. much fun for simulation. the last time i tried it nothing was integrated, so you used geda to generate netlists and then fed them to a SPICE command line tool.
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Jul 9, 2017 18:58
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oh cool looks like ltspice still has a free trial: http://www.linear.com/designtools/software/
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Jul 9, 2017 18:59
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there's this thing https://www.tinkercad.com/circuits
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Jul 9, 2017 19:55
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mods please change the thread title to 'fault and catch fire'
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Jul 9, 2017 20:00
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Boiled Water posted:turns out being good at touching computers doesn't make a good electrical engineer
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Jul 9, 2017 20:10
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directly controlling the motor on a system not designed for it seems like a pretty bad idea. just send the rf signals to the built in controller and let it handle opening and closing.
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Jul 9, 2017 20:12
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home automation is pretty dumb, i like a 100% analog house with high quality switches/fixtures/etc requiring my dainty computer touching hands to operate manually
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Jul 9, 2017 20:14
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Yeah ltspice has free version but it's about the least fun thing to gently caress around with in the world. Fuckin lomarf at mounting the pcb directly against the wall tho
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Jul 9, 2017 20:20
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"Home Automation" is a misnomer, it's almost never automated in any meaningful way. You're just making it harder to turn on your lightbulb by having to unlock your phone, open the correct app (separate apps for each device of course) and try to click on the tiny button that hopefully does what you want. It's obviously superior compared to using the boring old lightswitch that's right there on the wall. My favorite thing so far is collecting hundreds of useless stats about my house  OpenHAB pushes everything it knows about to InfluxDB because why not 
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Jul 9, 2017 20:34
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muckswirler posted:Fuckin lomarf at mounting the pcb directly against the wall tho I've mangled the box in OpenSCAD to add a solid backing plate, space for a proper voltage regulator and taller standoffs so the board isn't directly touching anything  The instructable made it seem like the original creator knew what he was doing but holy hell there was so many problems with this
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Jul 9, 2017 20:41
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r u ready to WALK posted:The instructable made it seem like the original creator knew what he was doing but holy hell there was so many problems with this
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Jul 9, 2017 20:58
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You should do the math for the sun's position throughout the day and have the blinds open and close automatically op
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Jul 9, 2017 21:42
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im an ee and i remember there was a linux-based spice solution that was comfortable to use. ive forgotten what it was called same way ive forgotten everything else they taught me i recommend googling around what ee university departments recommend their students
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Jul 9, 2017 22:24
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poty posted:im an ee and i remember there was a linux-based spice solution that was comfortable to use. we used ltspice. far as i know it's windows only, although it runs in wine 
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Jul 10, 2017 05:28
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i'm super psyched for our dumbass automated home future where all someone has to do is cut the phone/tv cable coming to the house and the occupants literally cannot use their house any more then they die falling down the stairs in the middle of the night when they can't turn on a light, or when their smoke alarms fail to detect a faulty pcb lighting their house on fire
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Jul 10, 2017 07:28
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"your honor, the defendant is accused of willfully and with malice aforethought unplugging a router causing the death of a family of four when they couldn't unlock their front door and subsequently starved to death"
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Jul 10, 2017 07:31
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Stymie posted:"your honor, the defendant is accused of willfully and with malice aforethought unplugging a router causing the death of a family of four when they couldn't unlock their front door and subsequently starved to death" it would own if this happened
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Jul 10, 2017 08:13
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I CANNOT EJACULATE WITHOUT SEEING NATIVE AMERICANS BRUTALISED!
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r u ready to WALK posted:"Home Automation" is a misnomer, it's almost never automated in any meaningful way. You're just making it harder to turn on your lightbulb by having to unlock your phone, open the correct app (separate apps for each device of course) and try to click on the tiny button that hopefully does what you want. im the graph for when ur postbox is open
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Jul 10, 2017 09:29
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OP is holding it wrong
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Jul 10, 2017 09:41
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Boiled Water posted:turns out being good at touching computers doesn't make a good electrical engineer
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Jul 10, 2017 15:01
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ADINSX posted:You should do the math for the sun's position throughout the day and have the blinds open and close automatically op just use a light sensor imo
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Jul 10, 2017 20:29
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[quote="“blowfish”" post="“474213616”"] it would own if this happened [/quote] maybe it would stop ISPs from deploying CPEs assembled from back-alley Shenzhen parts
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Jul 13, 2017 19:39
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I like being able to say 'Alexa, lights on' and 'Alexa, thermostat 75' when I get home Intelligent use of money it ain't but it amuses me
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Jul 14, 2017 00:13
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Through the magic of https://github.com/cflurin/homebridge-mqtt and https://nodered.org I am now able to tell Siri to open my bedroom blinds, and HomeKit supports grouping by room so you can say "open the livingroom blinds" or "close all blinds" to control several at once. And all it took was three weeks of loving around and ordering parts on ebay to save several seconds of my day!
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Jul 16, 2017 14:52
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gonna nerd it again with that nodered since the nest stuff i used with homebridge was okay but a bit too meh without better control integration. itd be nice to patch in the ceiling fans with the central air fan so i could just cycle air instead of going room to room like a caveman
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Jul 16, 2017 20:29
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quote:Regarding Cat Genie
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Jul 17, 2017 07:54
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lol at dealing with that for a year instead of just throwing the whole heap into the loving trash after the first time it happened.
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Jul 17, 2017 15:08
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polyester concept posted:lol at dealing with that for a year instead of just throwing the whole heap into the loving trash after the first time it happened. this, but owning a cat in general
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Jul 17, 2017 15:24
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lol 
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Jul 17, 2017 16:05
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ROFL cat owners are such morons "let me buy something that will attempt to grind and flush my pets fecal matter. btw my pet is a long hair cat that will regularly poo poo out hairy poops, but i've never known long batches of hair to clog drains" here's an idea: buy a kit to toilet train your dumb cat and the poo poo can just magically be in the toilet without going through some complex poo poo disposal machine
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Jul 18, 2017 01:42
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