Mobile Phone Interface for Audio, Visuals and Control

[Tec]

This is a web-based 'javascript' application for audio and visuals onto your phone.
eg it is a single html document that will work on any device.
It is a work in progress





Check it out working here:

www. tctec . net / wombat.html
The 'Demo' mode, simulates targets.

Purpose:
Demonstrates responsive audio on the mobile device so wireless headphones can be used.
Use the Mobile device to display and control the detector.


More detail:

Communicates to your detector over a Wifi interface , not too expensive now with something like a 'ESP8266' module for $13
Audio is fully adjustable and customisable: waveform, frequency and range

It can be daunting to cobble together javascript and web applications, especially when you have no experience with coding
so I will give you free and unlimited support and help from one of the best developers in the world today, he also knows alot about most things,
he's called 'chat gpt'

[Tec]

System overview:
I am making a web-site for this project

Main points:

• Audio is ok through the phone jack.
• Bluetooth headphones from the phone is too laggy to be usable (0.5 second delay) .
• ESP8266 (wife module) has simple (arduino) software that is just a serial bridge between the arduino nano and the phone. (attached)
• The html-JavaScript application on the phone is quite easy to develop with free tools: notepad++ and chromium-browser. Code changes can be instantly tested and debugged with the 'inspect' built into the browser.
• Visuals updates on the page must be kept to a minimum for speed.
• Capable of 10Hz update of two separate audio wave forms (one for conductivity sound) .
• Sending 3 x 32bit integer values from the Nano to the phone 10 times per second no problem.
• The Wifi module is power hungry, and a source of noise so it has a separate DC-DC converter power supply ~(60mA at 12V).
• The Front-end detector electronics should be put in a metal can or shielded /kept away and spurious noise that may spit out from the Wifi module, if precautions are taken then it is ok.

Attached is a working html application, and the ESP8266 arduino code

[Detectorist#1]

Hi Tec,
One question - what parameters of metal detector you improve with these additional features?

[Tec]

Hi, good question;

Audio over Wifi can be laggy and is not as good as direct Wired headphones or low-latency wireless.

The Wifi Link is for: Visual Display, Data analysis and Custom control

For example the charts below are made using free 'html and javascript' tools.

So what do I get ?

1. Coil setup: I want to know exactly what my coil signal looks like and set the perfect sample delay (see below)
2. Target Analysis. I would like to know what my target is before I dig it up. Is this possible ? This is research into plotting the sample at ~15uSec against the sample at ~40uSec as the coil is swept over the target.