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I'm still waiting for mine to arrive, but I'm curious how hard it is to interface with the I2C bus. I found a bunch of low-cost 16 channel LED drivers that use I2C for control, and would love if they have basic "send 'blah' to 'address'" drivers so I could do all the work in userland without having to write any kernel-mode drivers. The appeal of having my own personal (monochrome/low resolution) jumbotron is too much to pass up. corgski fucked around with this message at 16:10 on May 25, 2012 |
# ¿ May 25, 2012 16:06 |
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# ¿ Mar 28, 2024 14:01 |
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Cunning Plan posted:Which led drivers are you looking at? I'm looking at some led projects, am on the lookout for some cheap drivers! I settled on the NXP PCA9635. 16 independent 8-bit channels, with additional functions for easy 4-color mixing, plus an 8-bit master and strobe effects. Nice little chip for $2.50 each, although it's only available in a TSSOP surface mount variant which isn't the easiest thing to work with at home. v True, but SMD soldering takes a bit of practice and a good pencil-tip soldering iron. Here's a cheap 28-TSSOP to DIP board: http://store.nkcelectronics.com/tssop-to-dip-adapter-28pin-065mm-28065.html corgski fucked around with this message at 03:14 on Jun 7, 2012 |
# ¿ Jun 6, 2012 22:49 |
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Your Merchandise Total $35.00 Your Freight Total $6.55 Your Tax Total $2.49 Your Order Total $44.04 It would be more expensive to have them reshipped from anywhere else than it would be to just buy them locally, it seems.
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# ¿ Jul 5, 2012 10:28 |
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And mine arrived just now, only three months after I had ordered it!
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# ¿ Jul 13, 2012 23:09 |
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doritos posted:You're advocating a programming language nobody has ever heard of and has zero real world use. But I'm stretching for arguments? The only valid flaw you've come up with is that the composite port probably wasn't worth the $0.35 it cost to put it on there. Please enlighten me on the "up to date" release you seem to think is between Debian stable and testing. So if you don't like scratch, you must not like LEGO Mindstorms, PureData, Max/MSP, BASIC, or any visual programming language that doesn't adhere to strict standards of being loving inaccesible for non-coders. Once again, nobody is using GCC. If you're using scratch, you're using its interpreter, and when you step up to python or ruby, you're using the interpreters again. No GCC. Period. Actually, I'll just C&P this over to the Raspberry PI thread so they can have a go at you. corgski fucked around with this message at 02:03 on Jul 26, 2012 |
# ¿ Jul 26, 2012 01:41 |
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"Testing" isn't unstable. Unstable is unstable. Django sure isn't serious work, huh guys? Amirite? Ruby on Rails? Hobbyist level, at best.
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# ¿ Jul 26, 2012 01:58 |
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doritos posted:You can't retroactively drop things into the conversation and say I've made a statement about it when I haven't. I'm sorry, I figured you read what you quoted where I said that they'd step up into python and ruby. That was in the original post pre-edit.
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# ¿ Jul 26, 2012 02:01 |
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Django is a framework on top of python. Grats for not knowing your web technologies.
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# ¿ Jul 26, 2012 02:03 |
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Tell me more about how having a background in a high-level language is irrelevant when working with a direct superset of said high-level language. Also look at you thinking that schools have computers for every kid and the money for expensive IDE packages from their approved vendors. corgski fucked around with this message at 02:14 on Jul 26, 2012 |
# ¿ Jul 26, 2012 02:11 |
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Okay, back to basics. The RPI allows schools to get a computer for every kid that has an IDE pre-installed along with several high-level languages that are useful in the real world, and a couple that simply serve to teach programming concepts. The cost of getting a comparable package with a full Windows PC from an approved vendor (i.e. Microsoft) would be several orders of magnitude higher than the $35 they're asking for the Pi. Why again do you think it's a bad platform and/or an overpowered audrino? corgski fucked around with this message at 02:18 on Jul 26, 2012 |
# ¿ Jul 26, 2012 02:16 |
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Visual Studio is $400+. A PC is $600-ish. Schools don't just go and install random OSS packages without a support contract. A Raspberry Pi is $35 and includes an IDE, hardware, and support. (Granted, it will probably cost the schools slightly more for their support contracts, but it will still come in far under the $1k+ a seat that a PC would.) E: quote:2) it's only actually having success with people using it as an embedded board for gimmicky poo poo. Because it's still in limited release and they haven't opened up sales to schools yet. corgski fucked around with this message at 02:26 on Jul 26, 2012 |
# ¿ Jul 26, 2012 02:24 |
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MagneticWombats posted:So my Raspberry Pi just arrived and I realized I don't know what to do with it. I'm mostly looking for something that would involve a bit of low level programming and I've sort of glommed onto the idea of making a simple OS for it. You can't do GPGPU stuff on the PI at all. It's a proprietary chip, and broadcom's binary blob doesn't expose any general processing functionality at all.
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# ¿ Sep 27, 2012 19:56 |
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It's a little short on console tools that I'd think would be close to mandatory, (e.g. screen) but it's nothing a quick apt-get can't fix.
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# ¿ Oct 19, 2012 19:36 |
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Make them pulse smoothly. That'll get you writing a driver for whatever i2c-controlled PWM LED driver you use if nothing else. Set one up with a camera to monitor a coffeepot and alert you via SMS when the coffee drops below a certain level. Build a PI-powered digital picture frame.
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# ¿ Nov 17, 2012 04:18 |
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TVarmy posted:I'm still not 100% clear on if i2c needs root. As long as you add your user account to the i2c group, no, you don't need root.
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# ¿ Feb 3, 2013 19:43 |
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# ¿ Mar 28, 2024 14:01 |
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Powdered Toast Man posted:Mine is coming tomorrow, as well. My eventual goal is to use it as a media player...I'm guessing that's going to churn the processor pretty good, so am I likely to need any kind of cooling? Nope. Not unless you're going for a massive overclock, and you don't need that for media playback. If it makes you happy, you can glue a ram heatsink to it, but it wouldn't accomplish much.
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# ¿ Feb 21, 2013 21:57 |