toothache

USB power meter with QC3.0 adjustable output voltage

Overview

V2.0 (corresponding to Sheet_2 and PCB2)

The main control chip is replaced from STM32F030 to ESP8266.
Added the function of viewing data and adjusting the output voltage through wireless connection (when connected to a QC2.0/3.0 charger), and removed the function of manually rotating the potentiometer to adjust the output voltage.
Small size and portable (4.6cm*3cm) design.

V1.0 (corresponding to Sheet_1 and PCB1)

When connected to the QC3.0 charging head, it can be used as a power supply with an adjustable output voltage in steps of 200mV.
When connected to QC2.0, several fixed voltages can be output.
Can be used as a USB power meter to measure voltage, current and power.
The onboard 0.96-inch OLED screen displays parameters such as output voltage, current and power.
On-board temperature sensor can issue a prompt when the circuit board temperature is too high.
Onboard EEPROM can store and play back data.
The onboard rotary potentiometer adjusts the output voltage (when QC2.0/3.0 charger is connected).
Small size and portable (5cm*3cm) design.

Design Files

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