Requirements:
1. Connect the engineered device to the mobile phone's jack output
2. The device has to have an analog button to amplify the signal (like the volume button on a radio)
3. Another button / switch to change the sinus sound waves to square waves. (on or off)
4. Change the voltage to 50-100V (based on the amplifying)
The power source of the device is a small battery (AA or 9V).
The output is also a jack socket (mono).
Looking as simple analog device. What are the requirments to output power and THD? What is the value of load resistance? I think, I can do this work from schematics to prototype (and maybe to fisrt small scale batch)
$166 AUD in 7 days
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