9xALi

Discrete component QC adjustable decoy, verified

Overview

Source of circuit diagram: Digital Home:
Imitate a forum friend’s button version QC3.0 decoy
QC decoy device, using buttons instead of toggle switches

Use white light-emitting diodes or other colors to ensure the voltage drop is about 2.6V. They use direct plug-in components for easy soldering (the 16pin TYPEC female socket is more difficult to solder, so be careful not to tint it)

Lead out the original button wires to facilitate subsequent modifications. After testing, it can reach a maximum of 20V and a minimum of 4.4V. If it is lower, it will restart.

There was no problem when testing the Xiaomi QC2 charging head.

①RESET-1 and RESET-2 are connected to push buttons. Press the button to enter QC mode;

② UP-1 and UP-2 contacts move the button. Press the button to increase the voltage (step 0.2V);

③DOWN-1, DOWN-2 contacts push the button, press the button to reduce the voltage;

Finally, add a mini voltmeter and make a small box with the terminals to turn into a simple adjustable voltage

Design Files

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