Add USB Power Delivery Trigger HAT tutorial#618
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Comprehensive tutorial for building a USB PD trigger HAT using the CH224K controller. Covers PD protocol basics, voltage configuration, circuit design with step-by-step schematics, and safety considerations. Fixes tscircuit#601
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Quick check-in: branch is current on my side and CI looks fine from the last run. I can adjust scope or implementation if you want a different approach. |
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Summary
The tutorial enables building a HAT that negotiates 5V-20V from USB-C PD chargers.
Fixes #601
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