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echinopsis posted:using my multimeter... hmm genius... why didn't i think (because you have a serious substance abuse problem)
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Apr 1, 2014 17:29
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so let's say i wanna make a compass controlled by an arduino. gotta be able to turn 360 degrees. do i just use a servo or what
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Apr 1, 2014 17:40
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actually ideally it would turn continuously. so i need one of those that does feedback, right
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Apr 1, 2014 17:40
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Corla Plankun posted:(because you have a serious substance abuse problem) *cue laugh track*
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Apr 1, 2014 17:42
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brushless dc motor with an optical encoder on the axle feeding into a PID loop
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Apr 1, 2014 17:43
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Glorgnole posted:brushless dc motor with an optical encoder on the axle feeding into a PID loop optical encoder, that's what i was trying to remember. thank you :-)
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Apr 1, 2014 17:44
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man gray code is frickin cool
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Apr 1, 2014 17:45
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Werthog 95 posted:so let's say i wanna make a compass controlled by an arduino. gotta be able to turn 360 degrees. do i just use a servo or what Yeah thing about lovely hobby servos is that they use a pot to determine the position, this is why most dont do continuous rotation. You can get them to do continuous rotation but this is by removing the pot and just using pwm to determine speed and no positional feedback. You can technically get a servo that does both contiuous rotation with oositional feedback but excpect to pay like $200 or more. You could use a stepper motor as long as you dont miss any steps, or recalibrate zero or north or wjatever reference point periodically
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Apr 1, 2014 17:47
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peepsalot posted:Yeah thing about lovely hobby servos is that they use a pot to determine the position, this is why most dont do continuous rotation. You can get them to do continuous rotation but this is by removing the pot and just using pwm to determine speed and no positional feedback. You can technically get a servo that does both contiuous rotation with oositional feedback but excpect to pay like $200 or more. stepper motor route might be good enough for what i'm doing, it's easy enough to recalibrate every time i start it up. plus i already have one sitting around from another aborted project. i'll play around with it
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Apr 1, 2014 17:50
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Werthog 95 posted:optical encoder, that's what i was trying to remember. thank you :-) also peep this http://www.mouser.com/Search/m_ProductDetail.aspx?ams/AS5048B-AB-10/&qs=sGAEpiMZZMurtJ7VwBTl0SWHTbp7nPWNqQF6blNFuwE=
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Apr 1, 2014 18:04
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and this if you do stepper http://www.panucatt.com/mobile/Product.aspx?id=37854
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Apr 1, 2014 18:07
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peepsalot posted:also peep this you like peeping don't you. i bet you do it a lot.
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Apr 1, 2014 18:08
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Werthog 95 posted:hey, hi, i have a question what are you doing exactly
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Apr 1, 2014 18:09
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Dr. Honked posted:you like peeping don't you. i bet you do it a lot. PEEP and POKE
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Apr 1, 2014 18:10
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coffeetable posted:what are you doing exactly it's a secret it's a really dumb goony idea but i wanna make it before i show it off because otherwise i'll never finish it
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Apr 1, 2014 18:12
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use a stepper motor plus an optical sensor to make sure the stepper motor is turning in the right direction.
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Apr 1, 2014 18:33
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Doc Block posted:use a stepper motor plus an optical sensor to make sure the stepper motor is turning in the right direction. you don't really need feedback on a stepper, the sequence of pulses to the coils determines direction. only thing you need positional feedback for is if you have external forces capable of overcoming the motor's torque.
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Apr 1, 2014 18:45
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Werthog 95 posted:it's a secret is it a compass but it's powered by cell phone that moves a dial around or perhaps it's a missile guidance system??
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Apr 1, 2014 18:48
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EMILY BLUNTS posted:is it a compass but it's powered by cell phone that moves a dial around basically the former, it points to a gps waypoint. should be pretty easy to zero the thing on startup, i guess stepper motor's the way to go
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Apr 1, 2014 18:50
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if it's a cat compass and you're using it to track an rfid hanging off your kitty you will become a yospos hero think about how much fun that would be for like a little kid to play with
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Apr 1, 2014 18:50
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Jonny 290 posted:if it's a cat compass and you're using it to track an rfid hanging off your kitty you will become a yospos hero that's actually a good idea, i lost a cat yesterday for like an hour before discovering him burrito'd in a blanket
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Apr 1, 2014 18:51
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a digital cat map that shows the locations of your kitties on a diagram of your place of dwelling
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Apr 1, 2014 18:53
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in the meantime, i've just tied iphones to all my cats
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Apr 1, 2014 18:53
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Someone in this thread linked a book that was a really good introduction to electronics, what was it?
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Apr 1, 2014 18:56
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more like dICK posted:Someone in this thread linked a book that was a really good introduction to electronics, what was it?
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Apr 1, 2014 19:07
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that one by forrest mims maybe? e: ^ yeah that one
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Apr 1, 2014 19:07
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Thank you. Now I'll go blink and LED and then throw my arduino into a drawer and forget about it.
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Apr 1, 2014 19:26
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i've got this, looks decent, not battle tested yet http://www.amazon.com/Practical-Electronics-Inventors-Third-Edition/dp/0071771336
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Apr 1, 2014 19:29
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This is the best book of electronic for the person who is serious about learning about electronic . ” Certified Trainin Agency
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Apr 1, 2014 19:30
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Werthog 95 posted:stepper motor route might be good enough for what i'm doing, it's easy enough to recalibrate every time i start it up. plus i already have one sitting around from another aborted project. i'll play around with it you can do an automatic recalibration if you put a limit switch on a spring somewhere so that the motor can turn and hit the switch, but also push past it when needed or just do it optically
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Apr 1, 2014 19:36
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Bloody posted:This is the best book of electronic for the person who is serious about learning about electronic . ” thanks for promote my review
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Apr 1, 2014 19:36
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also if you're gonna read forrest mims stuff, just please please stick to his electronics and do NOT delve any deeper into his other writings
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Apr 1, 2014 19:37
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Corla Plankun posted:(because you have a serious substance abuse problem) well he is a pharmacist
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Apr 1, 2014 23:23
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the problem is that i have to keep going back to work
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Apr 2, 2014 00:01
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how is that a problem isn't that where all the drugs are
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Apr 2, 2014 01:55
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yeah but i have to give them to other people
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Apr 2, 2014 04:54
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da-ding  writing cpu emulator stuff is tedious af but also kind of relaxing
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Apr 2, 2014 06:14
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wouldn't you also need a sound chip emulator to make the ba-ding noise? or was that all done on the cpu on a gameboy which is what i assume that is from the window title
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Apr 2, 2014 06:19
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power botton posted:how is that a problem isn't that where all the drugs are seriously though there is nothing fun to gently caress around with in a pharmacy unless you hate remembering life and love addiction
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Apr 2, 2014 10:11
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well im on yospos so...
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Apr 2, 2014 10:57
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