So, we had the opportunity to test out the headphone jack with an actual spark gap and it was absolutely wonderful. Check it out:
With the data we can actualy find out the frequency of the spark occurrence. In our case it turned out to be ~ 34 – 36 Hz. And since this is in the Audible range we can actually hear this (somehow we missed this when making the video)
Audio file : GoogleDrive
Part – I – Lightning detector with a simple headphone jack
Part – II – Detecting switching ON/OFF of Tube Light using headphone jack
Part – III – Cigarette lighter spark detection using headphone jack
In this post we will be trying to emulate basic functions as prescribed in the Android Documentation. In order to understand the functions we first need to understand the circuit layout of the headphone jack which is as follows:
Now with this circuit in hand you can perform a series of tasks. This has been summarized in the table below.
This post will primarily focus on the Function A since that is the one that is commonplace in all mobile phones with a headphone jack. In the following video, we demonstrate how to emulate the following functions using a headphone jack
- Open Google Voice
- Next song
- Emulating Google voice
In this post we shall be exploring the usage of the solar panel and a headphone jack as a probable LiFi based module. We will be making use of the Arduino’s ToneMelody example to play tones on a LED. The LED will be shone on a Solar panel whose output will be relayed on to the computer with a 3.5mm headphone jack.
Now, some people might be uncomfortable in using an Arduino. OK! Instead of using the Arduino one can use combine the mobile phone and headphone jack to generate the tone instead. The schematics of this is given below: