DIY 5V Power Hack: Unwired Car System Upgrade

How to DIY a 5V power supply with the Unwired car connector module connected to the car's smart system?

The public board circuit of the car connector module has a robust 5V output load capacity. Simply grab a 12V power source, combine it, and you can modify it to a stable 5V output. Testing shows it can handle a load of 3A, and it provides protection against a maximum 12V power source.

Materials:

For the casing, use this power supply.

For the 5V part, use the Unwired car connector module designed for connecting to the car's smart system.

For the 12V part, use this cigarette lighter output 12V power source made by Taiwan's LEI, with a decent load capacity.

Assembly:

Connect the different parts using a plug-in method, and use a single USB port for output (short-circuit D+ and D-). Modify the casing as needed, and then connect the parts accordingly.

Depending on the application, add color rings to the plug pins.

Test the load capacity using a USB tester. Generally, the voltage displayed on a USB tester for load testing is slightly lower than that shown on a multimeter. However, this public board circuit board is the opposite; the voltage displayed on the multimeter is higher than the USB tester. Here's a simple load test overview: