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I'm trying to break the current of a car battery for an x period of time. Any input will be greatly appreciated.
Get an arduino board and a relay capable of switching a 12v circuit. Also get a wifi / bluetooth add on board so you can communicate with the arduino from your smartphone platform of choice.
Here is an example of an arduinos capability, this particular example is using bluetooth.
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I had IOIO board and went through DIY Samples, like controlling LED, DC motor, Servo motor.. it was very interesting, and I want to design a toy remote car which should be controlled by an android app, There are many android boards available like Hackberry a10, Arduino, Raspberry Pi..etc, as I'm a newbie to hardware domain, I do not know much about boards. So kindly update me on Which one is the best and versatile?, I'm going to use Android studio for the development, not the processing. Is there any other protocols available for transmitting the signals other than BT, IR, and Wi-fi.
You can use Arduino, which provides a wide variety of hardware to connect with. Please go through arduino store . There are many samples available for Arduino. Please refer this may help you to get started.
Best is a tough question, but if you are a hardware newbie, the easiest system to get started with is probably the LittleBits Cloud pack. Once you've prototyped what you need, you can replace it with something more practical in terms of form factor.
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What should be the better choice to buy an Aruino board. My concept is from desktop output is given to android device through internet and its out is to Arduino board via USB cable and board gives out to run motors.
Thanks in Advance..!
The major differences are things like number of pins and memory sizes. Here is a good list:
http://arduino.cc/en/Products.Compare
The Uno will run most programs you will need and are very compact. Go up further if you have more pins requirements.
I can't add below since it says the topic is closed:
If your motors are small and you are thinking of running them all or a few doctor from the pins instead of from outside supply you need to be aware of the current capacities
http://playground.arduino.cc/Main/ArduinoPinCurrentLimitations
Sounds like the uno will be fine for you unless you need slightly more current.
The easiest way to add android support is over a Wi-Fi or a Bluetooth shield that you can quickly add to your uno.
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Here's the scenario:
Phone's battery is dead.
You go to plug in the phone.
From here, I'd like the phone to automatically turn itself ON once it detects a power source.
What's the best way to do this? Is there an android solution or would this take a custom ROM or something lower-level?
This could be done only on hardware level. No software could power up phone if it is truly off - not in sleep or any other passive state.
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I am trying to develop an android client-server to implement games like this:
you have got a tablet running as a server and waiting for clients to join
each client is a smartphone and starts an app, which shows a gamepad view when the connection is established.
Sending inputs from smartphone to the tablet and update() und the tablet figure movements etc.
My question is: what kind of communication is practicable? I would prefer a TCP connection with sockets but is there a more simple way?
Yes, it's practical, and no, there isn't a simpler way. NFC won't do what you want, and bluetooth is a pain to configure for this sort of thing. You can make discovery easy by using Network Service Discovery or, on older Android versions, jmDNS.
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I would like to ask what studies are needed for me turn my smartphone into a wireless keyboard and use for desktop/laptop/etc...? How could I achieve this step by step? Thanks a lot for helping.
You would require an app which has a keyboard layout (or just use the android softkey) and send the key press code to a computer via Bluetooth.
You computer should have an interface software that can receive you incoming keystroke signal and convert that into the OS signal.
Actually there is an app in the market which has the same functionality
https://play.google.com/store/apps/details?id=com.iandrobot.andromouse.lite&hl=en