This is a quick button for smart phone which used audio socket.

Step 1: Video Instructions

quick button

Here is a simple method to make a quick or short cut hardware button for mart mobile phones. It uses the mic pin as input pin. Its generally pulled up by a high resistor and used to bias the mic. Here in place of mic we have used a 10K Resistor and a switch. If you press then input will vary from high - low - high . The App reads the mic port and if sees this kind of patter then consider it as a single click and does the necessary action.

In google play store search for “ iKEY” , you will find multiple free app like iKey, KeyCut, Klick, Clicky , headset droid, headset button controller etc. This app can be used to program the short or long press, single or multiple click. It can also be used a FM antenna if not used as mykey. Using mic as input pin many companies has designed swipe card reader too.

<p>This could be used on a Android tablet, aswell, right? :) Also, would it be able to do the command when locked?</p>
<p>have you managed to get round the fact that is disables sound? Its been the bigest problem ive had :/</p>
<p>I did not get any sound issue. Was able to take calls. even mobie speaker was working. the key was detected as mykey not as headphone. </p>
<p>Maybe its just my phone then, but if I have anything in the headphone jack, it disables my main speakers and diverts to headphones... :( </p>

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