#robotics | Logs for 2016-05-05

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[01:30:42] <deception1> Hi i am planning to make a full rgb propeller display with 16 color. currently I have arduino mega which have 54 digital i/o pins out of them 15 pwm pins. The idea is to have atleast 10 rgb leds please advise. and I didn't have a motor and rpm control in place kindly give advise on that also
[01:34:04] <Snert> dunno what a propeller display is, but people use TCL5940 chips to drive large numbers of rgb LEDs.
[01:34:45] <deception1> oh cool let me check it
[01:34:55] <Snert> yea google arduino tcl5940
[01:35:34] <Snert> lots of libraries and examples and such.
[01:35:49] <rue_2bed> 5940 is a pwm array driver, 9 or 16 channels, cant remmeber
[04:17:31] <anonnumberanon> rgb is by canging voltage ehh? for that pwm would work as a correct way to do it, albeit quite processing intensice for an mcu
[04:18:36] * anonnumberanon buys an rgb propeller so that his quadcopter will fly in colors
[05:04:47] <Triffid_Hunter> anonnumberanon: how is spitting out PWM intensive for an mcu? most of them have hardware timers for that..
[05:05:10] <Triffid_Hunter> anonnumberanon: and talking to a tlc5940 just needs SPI which most mcus also have a peripheral for
[08:54:31] <rue_2bed> yea, I got a bunch of 5940 just for pwm control
[09:12:39] <veverak> damn it
[09:12:41] <veverak> hate school
[09:12:59] <veverak> or, let's say that university and work alongside starts to be really time expensive
[09:34:46] <SorcererX> look on the bright side, if you start working full time and have kids, you'll think back on all the time you had while you were in University and worked part time :P
[09:41:03] <veverak> lol
[09:41:05] <veverak> got a point
[09:41:07] <veverak> :)
[15:54:41] <__m00n__> wooooo
[17:55:29] <anonnumberanon> Triffid_Hunter, let me see your PWM application. You need to churn out 20 of them with an 8-bit micro alone.
[20:27:12] <MDude> I wonder why there hasn't been much in the way of dangerously large BEAM robots made for the sake of watching them go around plowing into things.
[20:34:36] <MDude> I get that there's scaling issues but I would think at least someone with a spare solar panel and one-horsepower electric motor would have made a giant symet by now.
[20:56:11] <SpeedEvil> https://whisperingdark.files.wordpress.com/2013/06/baba.jpg
[21:18:08] <Snert> big robots are hard on the pocketbook and Wife Approval Factor.
[22:50:44] <anonnumberanon> spacex launch and landing attempt in a few hours
[23:20:42] <Triffid_Hunter> MDude: Theo Jansen's strandbeests?
[23:21:40] <MDude> THose are nice.
[23:24:36] <MDude> It's even more surprising that strandbeests never became a bigger thing in steampunk given that they're powered by air preassure.
[23:24:57] <MDude> Looking it up, I only see one example, made of Lego.