I am interested in building a prototype of a device for testing vision which would be basically like the the devices you may have used when renewing your drivers licence. You basically look in to a "binocular like" eye piece and have to read different size letters and preform a few other tasks. Here is a pic of the type of device I am talking about.
http://www.southpointesurgical.com/images\optical1000.gif
These devices are purely optical and just use a light to illuminate a slide where I am interested in building a device that uses two small oled or amoled or similar type screens(one for each eye). Is it possible to connect and drive these types of screens from a standard desktop computer? Ultimately I would like to have the device powered buy a raspberry pi style micro-computer and communicate to the results of the tests to a laptop connected through a usb cable but I don't think the current generation of raspberry pis support multiple displays. I have tried to google the question but was unable to turn anything up.
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Hi there
I'm embarking on an ambitious project and i was wondering if anyone could help me by giving suggestions.
I am making my own home automation system, and I already have the necessary hardware to get it up and running, but I want to take it a step farther.
I have this (Use google translate lol) http://cba.sakura.ne.jp/kit01/kit_399.htm kit, which is basically a set of 8 relay switches that can be used to turn on and off mains devices (such as lights, powerpoints, ect) that are controlled by a computer through a DB25 printer port. I also have an old Dell D600 laptop that has said printer port, and the software needed to drive the circuit board. This is all well and good, as everything is working so far, but before I bother to install this thing in my roof and hook it up to control my lights, power points, ect, I was wondering if there is a way to use my android phone (HTC Legend, unrooted ) or tablet (Motorola xoom wifi rooted with Tiamat, o/c to 1.7ghz) to control this board through a computer.
I already have a client that remote controls the computer (splashtop remote), and I can achieve this with some difficulty by remote controlling the computer and using the PC software through my phone/tablet, but I was wondering if there is an android home automation program and its PC client service that supports DB25 printer port pinout settings, so I could directly control the circuit board through the app, like the leading home automation apps already available (minus the extremely expensive proprietary hardware that you need with them). If not, has anyone else considered developing one? If anyone could give me any help on this it would be greatly appreciated.
I've become curious whether any mobile devices with USB ports could be used, with appropriate software, as auxiliary USB keypads or keyboards to another host device? Given the ubiquity of small LCD touchscreen tablet devices now, it seems like an obvious application to develop software that would display programmable keys on a touchscreen and then output appropriate key scancodes or sequences via a USB port to another connected system, in essence making the tablet appear as a USB HID to the host. The software aspect would be somewhat trivial; I've seen software for Windows Mobile touchscreen devices with IR transceivers that allows them to be used as universal remote controls. This would in effect be a USB variant of that type of software.
Is that technically feasible, or is there a limitation to the USB spec or hardware that might prevent it? Is there a host-client aspect to USB that exists outside of software alone?
It seems I need to post this in another area to reach the right audience for my question, but which one?
There's plenty of apps that enable this via wifi or bluetooth, but I haven't seen any that would do it over USB. I don't see why it shouldn't be possible, but it seems no one has coded it yet.
The reason it came to mind is that there are companies selling some surprisingly expensive auxiliary programmable USB keypad devices. With the addition of the necessary software, tablets and similar devices with touchscreens might be poised to erase their cozy little overpriced vertical market. That is, if there's no limitations to USB hardware or drivers that would prevent it.
Please use the Q&A Forum for questions Thanks
Moving to Q&A
I want to design a program that will run on an Android Mini PC. It'll be connected to any monitor so that when the monitor is turned on, it'll power up the android mini pc via USB (monitor will be required to have USB port) and then the program will start automatically and display on the monitor.
The program itself is a visual acuity chart (like at your eye doctor's office). So it will run all day as you use an RF remote to flip through the images.
Sound easy? I'm trying to figure out if Android or Raspberry Pi would be best for this.
Thanks
Pretty cool idea. The only thing I can think of is Android on the Android sticks allows a customizable boot animation which would be cool to create your own for marketing. The Android sticks are also faster and boot quicker so less wait.
You can also remote desktop into a more powerful machine to offload some work. Essentially have a server as the mainframe.
Android will also require you program it to run at startup. I'm not sure how you do this without a 3rd party app, but I know some apps that load on startup.
Both units are tiny and the android sticks include wifi and there are some Bluetooth models. The Raspberry Pi has neither. And boots slower and isn't powerful.
I think its an easy choice.
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player911 said:
Android will also require you program it to run at startup. I'm not sure how you do this without a 3rd party app, but I know some apps that load on startup.
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ok, so it would at least be possible but I'd need some intricate coding and extra apps which is ok with me. thanks
You need to look at the power requirements of the Android Mini PC as well. Often they draw more power than is available through TV and monitor USB ports. You might get enough power to run the mini PC but if you have wifi, wireless keyboard/mouse, bluetooth and other devices the power draw might exceed the output of the monitor. This is something I am interested in as well as I am trying to resolve the power on/off problem on these mini PCs. The probox has a remote with a power button but I've heard the remote has problems with distances more than 1M.
strongsad said:
You need to look at the power requirements of the Android Mini PC as well. Often they draw more power than is available through TV and monitor USB ports. You might get enough power to run the mini PC but if you have wifi, wireless keyboard/mouse, bluetooth and other devices the power draw might exceed the output of the monitor. This is something I am interested in as well as I am trying to resolve the power on/off problem on these mini PCs. The probox has a remote with a power button but I've heard the remote has problems with distances more than 1M.
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I won't need BT, wifi, or really anything. I need to find someone that thinks he can tackle this project. Any good places to hire someone for this type of work?
apparker said:
I won't need BT, wifi, or really anything. I need to find someone that thinks he can tackle this project. Any good places to hire someone for this type of work?
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Couldn't you use tasker or locale or something similar to run an app on startup? Just an idea...
So, there are Mini PC available from Ricomagic, that have MHL linkups to home theater PC's, and allow for an easy Android Display.
http://rikomagic.co.uk/
Could these devices be stuffed into Phone and Tablet Form Factors so it's effectively one device that you can run Android on, mix and match your brains with your outside form, and have a universal device of sorts?
Hey there!
As many of you may have heard or even tried, there is a functional "Desktop Mode" built into Android 10 (as long as the phone vendor didn't deactivate this). This mode will, when manually activated in the developers options, act like an Desktop OS when connecting your phone to an external screen. (or without activating anything in case of e.g. Samsung DeX)
I'd like to use this Thread to gather some information about the implementations of "Desktop Mode" into the phones of different vendors, and hope you can support me with testing it out on your phones.
Things of interest are (IMHO, to be continued):
is the desktop mode working (and usable)
does the dpi setup change in the moment of connecting an external screen (or does everything look just awful big)?
(yes, I know there are apps/tools to change that)
which maximum resolution is possible?
how many screens are possible? (usually just one, ...but who knows)
do you just need an USB-C to HDMI/DP cable or a (special) docking station for connecting a screen? (if using a cable, Miracast/wireless is another option of course)
does the handset get a special 'role'/feature in desktop mode? (like Samsung devices becoming a trackpad)
are there any usage improvements implementated, e.g. like file drag'n'drop or dragging windows to the display sides to maximize them on half the screen (like in windows)
what's the connection speed of the USB-C port? (USB 2.0, USB 3.2 G1 (5 Gbps), USB 3.2 G2 (10 Gbps) or even faster!?)
is it possible to use USB mouse/keyboard or just Bluetooth, and how's the speed? (eg. does BT lag a lot?)
At the moment it seems like Samsung has the best implementation of this feature with their "DeX Mode", but i'd like to know about those things from other vendors also.
My dream is to be able to ditch my notebook/tablet/8in tab/subnotebook collection an use just one device in future. (everything else needed for 'bigger' or x86 tasks can be done on cloud instances already)
But for that purpose there needs to be more than just 'basic' OS UI without any useful features
Hope we can start a good collection here and answer also your questions regarding this topic(s).
Thank you, regards
Schwarzer Riese