If you open a schematic PDF, here is how to read the critical sections:
For any project involving custom cables, external battery packs, or Arduino interfaces, accurate pinout information is essential. Xbox 360 Controller Schematic Pdf
If you want to troubleshoot a specific hardware issue on your board, let me know: Is your controller ? If you open a schematic PDF, here is
If you can tell me the (e.g., button not working, stick drift, or it won't turn on), I can point you toward the exact schematic section you need. Regulates input voltage (5V from USB or ~3V
Regulates input voltage (5V from USB or ~3V from batteries) down to stable operating voltages, primarily 3.3V and 1.8V , required by the integrated circuits.
: When hacking the controller, remember that triggers are analog; they output a variable voltage rather than a simple on/off signal. Instructables PCB revision