#robotics Logs

Jan 09 2013

00:10 piney other than that it's fine. my guess is that most people wouldn't use that feature anyway
00:13 rizlah When talking about voltage regulators (7805, 78L05), are they basically the same?
00:13 piney rizlah, those, yes.
00:13 rizlah Ok, so what does the L do?
00:14 piney I'm pretty sure the L was in older part numbers. not 100% on that though
00:14 rizlah oic
00:14 piney hmm, googleing says im wrong
00:15 piney 1 sec.
00:15 rue_bed no
00:15 rue_bed the L is a low power model
00:15 piney 78l05 is like 100ma
00:15 rue_bed .1A instead of 1A
00:16 rizlah oic
00:16 rue_bed its smaller too
00:46 RyanS so my lens zoom ring pushed using a rod needed about 1.8kg to rotate
00:58 RyanS hmm my gear ratio is 2.4:1 so that's a 4.3kg servo I think is required
02:07 PatoPatitoPatati hello everybody
02:09 PatoPatitoPatati Anyone awake?
02:09 Jak_o_Shadows hi
02:09 tobbor Hello Jak_o_Shadows
02:09 RyanS Does that bot say hello
02:09 Jak_o_Shadows apparently
02:09 RyanS hi
02:09 tobbor hi RyanS.
02:09 Jak_o_Shadows damn that's an annoying "feature"
02:09 Jak_o_Shadows hello
02:09 tobbor Jak_o_Shadows! like, totally tell us about the project!
02:10 RyanS bye
02:10 Jak_o_Shadows this bot's mocking me...
02:11 RyanS rue_mohr is a... (whats something we can say that might make the robot respond?)
02:13 RyanS tobbor what is the weather forecast for tomorrow?
02:14 RyanS tobbor open the pod bay doors
02:14 RyanS sigh
02:16 PatoPatitoPatati Has anyone used this motor? Pololu 50:1 Micro Metal Gearmotor
02:17 PatoPatitoPatati Its my first project and I dont know how to calculate the battery I need
02:20 RyanS hmm 40mA free run current at 6V
02:22 RyanS thers a 6V 2200mA pack which in theory should provide 55hrs.. (I think???)
02:23 RyanS but the load on the motor varies a lot I would guess
02:24 RyanS Going uphill drains batteries much faster
02:31 PatoPatitoPatati But I havent seen any graphics for this motor
02:31 PatoPatitoPatati like in others mother with the current, torque,....
02:31 PatoPatitoPatati mother =motors
02:32 RyanS http://www.pololu.com/catalog/product/2365/specs
02:35 PatoPatitoPatati so, if i use two of these, how could i calculate the battery i need?
02:37 RyanS 80mA, but I guess you have other stuff to run too
02:38 rue_bed you cant 100% discharge the batteries tho
02:38 rue_bed so 1Ah is not 1A for 1hr
02:38 rue_bed for a lead acid, its only 20%
02:39 RyanS ah yeh
02:39 PatoPatitoPatati yes, but Im starting to calculate my needs with motors first
02:39 rue_bed so in the case of lead acid 1Ah = 1A for about 12 mins
02:39 PatoPatitoPatati to start learning
02:40 PatoPatitoPatati Why did you say 80mA?
02:40 RyanS what so 50aH SLA is really only 10aH in practice?
02:40 PatoPatitoPatati using 2 motors
02:40 rue_bed to know how long your batteries might last, get a datasheet for a battery from digikey
02:41 rue_bed 2Ah is going to last twice as long as 1Ah, so you CAN scale from the datasheet charts
02:41 RyanS yeh 40mA each
02:41 rue_bed they have graphs of load vs run time
02:42 RyanS free-run current would be no load on the most whatsoever?
02:42 PatoPatitoPatati I dont find that motor
02:42 RyanS motor*
02:42 PatoPatitoPatati 0,7kg will be the weight
02:49 PatoPatitoPatati Did you find this motor on digikey?
02:50 RyanS heh, it's the Pololu one you mentioned
02:54 PatoPatitoPatati Do you have the link to the digikey motor info?
02:59 PatoPatitoPatati RyanS ?
03:03 PatoPatitoPatati They dont have Pololu Manufacturer
03:09 RyanS http://www.pololu.com/catalog/product/1098
03:10 PatoPatitoPatati yes, I was taking a look
03:11 PatoPatitoPatati so, the motor stall current is 1,6A
03:12 PatoPatitoPatati My battery should support 1,6*2?
03:12 PatoPatitoPatati or how is the calculation?
03:36 PatoPatitoPatati :/
04:23 PatoPatitoPatati is it better rubber (like banebot) or neoprene for wheels?
09:03 rue_house thats not a good wrestling robot motor...
09:04 rue_house well it might do for wrestling, not good for racing
09:04 rue_house I think you want something plain larger, a motor and gearbox that dosn't have 'micro' in the name
09:07 rue_house those motors top out, at 9W, the motors I was suggesting from dustbusters top out around 60W
09:08 rue_house http://www.pololu.com/catalog/product/1573
09:08 rue_house those top out about 36W
09:11 rue_house the 9.7:1 1010 rpm one
09:14 rue_house if you used a 2" wheel 2x 17oz-in motor could almost drive a 1kg robot up a verticle wall
09:27 rizlah Anyone know anything about paypal here?
09:29 GuShH rizlah: huh?
09:29 GuShH yeah they're money hungry bastards
09:30 GuShH they seem to enjoy massaging the balls of american people only.
09:30 GuShH but at the same time they'll squeeze as hard as they can
09:30 GuShH why?
09:30 rizlah Right, they allow you to add a card or bank account. With card, money has to be topped up right? But with account linked you can simply pay and take it straight from there, no?
09:31 GuShH with a card it's a "debit"
09:31 rizlah Better to top up in 1 - 2 days than give them details of account #?
09:31 GuShH you can either hve funds in account
09:31 GuShH or use it to debit money
09:31 GuShH either iwht a card or an account
09:31 GuShH rizlah: I don't know, since I'm not American I'm not good enough for them
09:32 GuShH so I can't verify the account unless I get an international credit card and those cost way too much and unless you are some big-shot boss you can't even get one.
09:32 GuShH in the US you just hand them your bank account number and it's verified.
09:32 GuShH boom, any idiot can get an account.
09:33 rizlah ... I verified without an international cc. Where are you?
09:33 GuShH but they're just lazy, very lazy. they could verify the details if you were to send them a scan of your ID... they just claim they don't have the means to verify it
09:33 GuShH rizlah: Argentina
09:33 GuShH a local debit card just won't cut it.
09:33 rizlah Hmm.
09:33 GuShH plus we get crazy taxes anwyay.
09:33 GuShH 15% on any online purchase
09:34 GuShH plus 50% if it's over $30-50 dollars and gets caught in customs
09:34 GuShH talk about a hell hole.
09:34 rizlah hhhehhehehe
09:34 rizlah Shitty gov't will shitty.
09:34 GuShH if some crazy guy with a rifle is reading this, head over to argentina... shoot the bitch president, you'll be a hero.
09:34 rizlah lolol gl with secret service.
09:35 GuShH the moustache guys?
09:35 GuShH sure, it's illegal to say that.
09:35 GuShH but they're doing actual harm and actual illicits, I'm just writing words.
09:35 GuShH I'm not taking millions from the people to buy a pair of gold shoes.
09:36 rizlah Meh, I'm in the EU so much easier
14:27 Naninonaniano hi everybody
14:28 Naninonaniano What do you prefer, banebot wheels or neoprene wheels?
14:29 Naninonaniano ?
22:00 rue_house http://www.youtube.com/watch?feature=player_embedded&v=3RBSkq-_St8#!
22:16 rue_house oops I started supper
22:18 rue_house there I set it up to burn in a few hours
23:18 GuShH rue_house: http://www.youtube.com/watch?v=hQWcIkoqXwg