51–60 of 66 posts
For about the same price ($60) you can get this fancy little HDMI display http://www.adafruit.com/products/2260 For $20 more it comes with a touch screen. It is great for little BBB or RPi projects, zero config required for the BBB.
The price I get at the link shows $60 only if you're buying 100 at a time, it's $75 for one. Still nice to know about though.
For about the same price ($60) you can get this fancy little HDMI display http://www.adafruit.com/products/2260 For $20 more it comes with a touch screen. It is great for little BBB or RPi projects, zero config required for the BBB.
The price I get at the link shows $60 only if you're buying 100 at a time, it's $75 for one. Still nice to know about though.
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The price I get at the link shows $60 only if you're buying 100 at a time, it's $75 for one. Still nice to know about though.
You can get them for under $20 if you buy them from China http://www.aliexpress.com/store/product/Free-shipping-LCD-mo...
This really should be the next thing the RPi team tackles, IMO. It's nice we have this great cheap computer, but trying to find a screen to plug into it is terrible. A computer monitor or TV is fine, but both of them draw too much power and are far too big and stationary. And have you seen the prices of small HDMI screens? I can buy a 8" Windows tablet, full PC mind you, for the price of a single 5" HDMI screen. Far…
What I'd like to see is a calculator shell that you could pop the RPi into, including physical buttons, lcd screen, battery and charger. My thinking -- most high schools require a graphing calculator, such as the TI 89 or similar, which is around $100 or so. Imagine if for that $100 you get something that can act as the same calculator, but morphs into a full computer when plugging in a keyboard/monitor? It may end u…
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So, these are almost all crappy clones of this: http://www.adafruit.com/products/1601 It's fine for static images and low quality video, but its using the SPI bus and a custom driver. This severely limits size of the display and/or refresh rate.
Yeah. This might change if the Chinese companies get wind of this technique; if I recall correctly these kinds of parallel LCD panels aren't all that expensive. (Edit: Actually, the controller chip used in those existing Pi LCD modules seems to support the required interface, it's just not pinned out. They could probably make new versions of the modules that are wired up properly.)
LVDS is just serialized parallel video. Serializer chips are ~$5 in singles on Mouser. Combining Pee DPI output with SN75LVDS84 ($2.5 if you order 10 from china) will allow you to connect any modern <=1366x768 resolution (single lvds channel limit) Laptop LCD screen. Those can be free if you have a broken laptop. You could even drive older "HDReady" 32' TV LCD with pee this way.
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I'm also still waiting for this one: http://techcrunch.com/2014/10/21/pi-pads/ It looks like the official site is down atm but they mention an introduction in 2014 in their FAQ. It's a 640x480(!), 7" touchscreen.
You can pick up a 7" touchscreen (1280x800) that works with a DPI display like this blog post mentioned right here: https://www.adafruit.com/products/2354
Wow, didn't know that you could do this with the Pi. People have been doing this with the Cubieboard since it came out[1], but to be honest I'd always assumed the Raspberry Pi display outputs were as tightly locked down behind the binary GPU blob as the CSI camera connector. [1] See for instance http://linux-sunxi.org/Cubieboard/LVDS - I believe it supports DPI as well as LVDS. script.fex is basically Allwinner's equ…
I get the feeling DSI will never happen, or it will be as crippled as CSI - locked down with blob to working with one official product only.
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This comes up every time someone mentions the corruption. We don't power off our many pis, but they are on UPSs (we use them for a security system.) However, the corruption happens so much that we keep disk images and have a spare on hand when we have to reboot them for any reason because 1/4 of the time they will not boot up. Even if it were corrupting the FILES being written when hard booted, it shouldn't corrupt t…
> Even if it were corrupting the FILES being written when hard booted, it shouldn't corrupt the FILESYSTEM being written. That's not how SD cards work unfortunately. When an SD card erases data, like if it's updating a file allocation table, it has to erase an entire block of flash and not just the bytes you care about. The card will throw the block into a cache in memory, erase the block, and then rewrite the parts…
This is an awesome post. A number of older laptop screens use this "standard" and you can just take off the screen and repurpose it. The trick is that sometimes the flex cable between the screen and the laptop has extra stuff on it. Time to go panel hunting for some more panels :-)
second part of my earlier post:
https://news.ycombinator.com/item?id=9155677&goto=item%3Fid%...
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Because of cheating? How can you use the Raspberry Pi (in a calculator shell) to cheat, in such a way that you can't use a ti-89 to cheat? Most cheating will be by either storing crib notes on the device (which won't do you any good in math if you don't understand the concepts), or by running a program to solve a problem for you, both of which the ti-89 is more than capable of doing -- that is its whole purpose, is t…
Standardized test calculator rules in this country are not governed by reason. For instance, a TI-89 is allowed on the SATs, but a TI-92 is not. Basically the same calculator, except the TI-92 has a qwerty keyboard. How would a tiny little qwerty keyboard actually give you an advantage on a test like the SAT? Who the hell knows. Remember 10 or so years ago when teenagers were all typing on telephone keypads? On the o…