Questions tagged [android]

Linux-based Operating System running a Dalvik Virtual Machine produced by Google, typically seen in portable devices such as cellphones, e-book readers, tablets, etc. Not to be confused with Androids in the robotics sense.

Filter by
Sorted by
Tagged with
28
votes
1answer
44k views

How do volume control headphones work?

A recent question over on Android Enthusiasts got me to wondering how volume control headphones work. I don't mean volume control which works by attenuating the incoming signal, but the kind of ...
22
votes
4answers
30k views

What protocol does a headphone jack use?

I have 2 questions. One is simple, the other may be not. 1. What's the official name for the standard headphone jack? It's universal for all brands of phones, so it must have a name (when you want ...
3
votes
1answer
197 views

How to connect one Android mobile audio output to mic of another Android mobile?

This question is to help the "Hard of hearing community" so that they can READ the phone/mobile call because they can not hear it. Android have some really good(and Free too) app which can ...
2
votes
2answers
8k views

A Bluetooth device that will send data to a mobile phone

I want to make a device which will send a data to a mobile phone which is connected using Bluetooth. Here is the thing: http://www.youtube.com/watch?v=g0qARDGJj1w. I want something like this. The ...
2
votes
3answers
35k views

Simplest Way to Connect an Arduino to Android (Wirelessly)?

I want to control a simple Light on an Arduino from my Android. The Arduino I have down pat, no problem. However without using Bluetooth on my Android, whats the simplest way to actually connect it (...
9
votes
2answers
4k views

How to make a fingerprint scanner (UART, Serial) for a headphone jack on Android?

Square up reads magnetic stripe cards through headphone jack on both Android and iOS. I want to capture fingerprints on an Android phone. Can I develop a hardware to capture fingerprints in the same ...
5
votes
1answer
972 views

Can Type-C device be configured as “Sourcing Device” without Power Delivery protocol?

I'm designing a device, that will be connected to various Android devices with either microUSB B or USB C receptables (in order to make it futureproof) and will be exposing some irrevelant ICs to the ...
0
votes
1answer
683 views

How to connect a line-out to mic on Android plug? (CTIA)

I want to connect line-out of a device to the microphone input of an Android phone, a Xiaomi Mi 4X. Then I can record and live stream from the phone. If I simply connect line-out left/right (red/...
3
votes
3answers
1k views

Use USB as an on-off switch

I'm looking for a way to build a zero(ish) cost intervalometer for my Canon SLR using only stuff that I have or can get very cheaply (my budget is about $4). I've already managed to "build" a wired ...
2
votes
2answers
37k views

Replace a three wire tablet battery with a two wire one

I want to replace an old 300 mAh battery in my Chinese tablet with a new 3000 mAh one. The old battery has three wires: red, black and white. The white wire connects to a pad on tablet's mainboard ...
0
votes
1answer
1k views

Is it OK to replace a 300mAh tablet battery with a 3000mAh one?

I want to replace the 300 mAh battery in my Chinese tablet with a new 3000 mAh one. My old battery has three wires: red, black and white. The white one connects to a pad on tablet's board labeled "T". ...