Android Scope Probe

This useful cord can allow an Android Phone/Tablet to be used as an osciloscope. All you need is the 4-pole 3.5mm jack to 3 rca cable. The cord will need to be modified and be tested with an resistance meter, so you can figure out which wire goes where. NOTE: EVERY CORD IS DIFFERNET! Also some phones or tablets can be stuborn and only use the cord if theres a load on the left and right speaker pins. Use a 7.5 ohm resistor, wattage shouldn’t matter because headphone standard is 1 miliwatt. The schematic is below:

The only thing bad about this circuit is sometimes series resistances with the signal you’re measuring increase the division.

Links:
4-pole 3.5mm to rca(thus link has changed because All Electronics went out of stock on the other one)
Software
Youtube video(old)

YouTube video(new)
The short URL of the present article is: https://delphijustin.biz/go/xkei