Robin Bobcat
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Joined: Wed Feb 29, 2012 1:01 am

Re: Pi-sized monitors?

Wed Feb 29, 2012 2:13 am

Since a lot of folks are looking to make micro-mini gaming machines or laptop-type gizmos, I'm just wondering about how the heck to *display* things. It's all fine and good to have a standard-sized monitor, but then that defeats the purpose of having a miniature computer.

Given that I am NOT someone who should be trusted with a soldering iron (I'd be looking at Arduinos if that was the case),

Someone said that the Pi could handle up to 20 volts? If so, then I think I may have the answer - a rearview camera monitor. Designed for use with cars, so 12vdc power supply. Standard RCA port. Run it all off one power cord/battery pack.

http://www.amazon.com/Small-Ad.....f_dp_p_t_1

Of course, I'm still not someone who should be trusted with unusual power supplies...

Anyway, I did find some good TFT and LCD displays over on Adafruit - http://www.adafruit.com/category/63 - they cater to the Arduino folks, but I'm thinking some of the stuff coudl be adapted.

So anyway.. thoughts on such things?

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Vindicator
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Re: Pi-sized monitors?

Wed Feb 29, 2012 3:46 am

The Alpha boards could do 6 to 20 volts the production boards are 5 volt microusb the FAQ should help clear up some of your questions.

http://www.raspberrypi.org/faqs
If you are more worried about ,spelling, punctuation or grammar you have probably already missed the point so please just move on.

Robin Bobcat
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Joined: Wed Feb 29, 2012 1:01 am

Re: Pi-sized monitors?

Sat Mar 03, 2012 12:51 am

Yeah, read that *after* I posted. Anyway, I should be able to step down the 12v or something...

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AndyD
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Re: Pi-sized monitors?

Sat Mar 03, 2012 6:40 am

It would be simple to step down from 12v to 5v using a USB Car Charger. Just do a search on ebay. They are in general very inexpensive.

Nick Brian Walters
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Re: Pi-sized monitors?

Sat Mar 03, 2012 11:56 am

I posted about a good solution here :

http://www.raspberrypi.org/for.....ys/#p45502

The screen I suggest was found and liked by the sector I'm employed in(Cinematography), as it balances input/output options, power, portability, resolution, and cost quite well. the display can be found directly here :

http://www.aliexpress.com/stor.....input.html

I'll quote from my post :

It"s a 10 inch TV/Monitor for about $140(including shipping to the US) with quite alot of input and output options, the most important being HDMI and USB, which may be capable of providing power to the Pi. It also has video out to send the signal someplace else, and audio in/out to act as the speaker system for the Pi. It also has a built in 2300mah battery and accepts a fairly standard 12v input, so it could be brought into many power systems already existing…like the car

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Jim Manley
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Re: Pi-sized monitors?

Mon Mar 05, 2012 2:46 am

These are fine to use as a display and audio player for an R-Pi.  However, note that most USB ports are limited to providing no more than 500 ma at 5V (per the USB spec), and those on non-computing devices often either don't provide any power, or may provide less than the 500 ma.  A bare-bones R-Pi reportedly draws 200 ma, but, one with two USB ports in use can draw upwards of 700 ma (the recommended rating for micro-USB phone chargers).
The best things in life aren't things ... but, a Pi comes pretty darned close! :D
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Nick Brian Walters
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Re: Pi-sized monitors?

Mon Mar 05, 2012 8:20 am

I definitely don't think it's a blockbuster solution, and am not even completely happy with it for Cinematography. It does however provide just enough for my needs at a decent price, and to step up to anything better takes $500+(USD)

I even stated in the original thread(link in post above) that it doesn't even have a low battery warning...it just turns off.

So yeah, it certainly isn't perfect. To be honest though I don't want something that "just works"(I have a laptop for that), I want the parts, pieces, and potential, which is why I love the Pi because it allows me to tinker

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