“Get not only 5 volts but also 9, 12 volts (18 Watts max) out of any QC-compatible charger/power bank for supplying power hungry projects.
Introduction
Many USB powered consumer electronic devices have built in Qualcomm QC (Quick Charge) solution for rapid charging at different voltages rather than the usual 5.0 volts. This enables the opportunity to use QC compatible Power Banks for projects require more power or higher voltages like 9/12 volts.
The purpose of this project is to develop a device that can hack the QC protocol and allow hobbyists, developer, engineers to use their power banks for more voltage/power for their next power hungry project.
Developing the Hack * Device
The whole device has two active components - the LM1117 3.3V voltage regulator and the ATtiny85 MCU to control. All other parts are resistors, push switch, connectors, jumpers, headers, terminal, protoboard etc.”