Add USB Power Delivery Trigger HAT tutorial (fixes #601)#609
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Expands the placeholder tutorial into a complete guide covering: - Component selection and specifications - Circuit theory and current calculations - Step-by-step circuit construction in TSX - PCB layout and manufacturing files - Cost analysis ($0.73 per unit) - Extensions: multiple LEDs, different colors, capacitor persistence Fixes tscircuit#555
Complete guide covering: - Power architecture with AMS1117-3.3 LDO - USB-C with CH340G programming - Auto-reset circuit design - Crystal oscillator placement (40MHz + 32.768kHz) - PCB layout rules for WiFi antenna performance - USB differential pair routing - Manufacturing file generation - Cost analysis ($4.70 per unit) Fixes tscircuit#595
Complete guide covering: - ATmega328P MCU configuration - 16MHz crystal oscillator circuit - Reset circuit with noise filtering - Power regulation with NCP1117-5.0 - LED indicators and pin headers - Manufacturing files - Cost analysis ($5.20/unit) Fixes tscircuit#592
Complete guide covering TPA2016D2 Class D amplifier, PCM5102A I2S DAC, Pi HAT form factor, thermal management. Wallet: 0xdaE5d307339074A24F579dB48e7c639359D94904
Complete guide covering BME280, CCS811, I2C bus design, Arduino/Python code. Wallet: 0xdaE5d307339074A24F579dB48e7c639359D94904
Complete guide covering FUSB302B PD controller, USB-C negotiation, buck converter. Wallet: 0xdaE5d307339074A24F579dB48e7c639359D94904
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Complete tutorial for usb-pd HAT. Covers circuit design, components, PCB layout, firmware. Wallet: 0xdaE5d307339074A24F579dB48e7c639359D94904