docs: add ESP32 module circuit design tutorial

[tungnguyentu]

Summary

• Adds /docs/tutorials/esp32-module-circuit.mdx — a step-by-step schematic tutorial for designing a complete ESP32-WROOM-32 development board support circuit
• Follows the same incremental format as the Arduino Uno schematic tutorial: each section has its own runnable <TscircuitIframe> followed by a complete schematic at the end
• Covers six sections:
  1. ESP32-WROOM-32 module — full pin definition with left/right split layout
  2. AMS1117-3.3 LDO power supply — 5 V VBUS → 3.3 V with input/output decoupling caps
  3. CH340C USB-to-UART bridge — USB programming interface with auto-reset circuit using two MMBT3904 NPN transistors controlled by RTS/DTR
  4. Boot and Reset buttons — manual override with pull-up resistors
  5. Status LED — blue LED with 1 kΩ current-limiting resistor on IO2
  6. Complete schematic — all sections assembled with proper schX/schY placement

Notes

• Uses <chip> for transistors (as <transistor> is not a standard tscircuit element) with explicit base/collector/emitter pin labels
• CH340C uses the real SOP-16 16-pin pinout (the task spec listed 18 pins — corrected to match the actual datasheet)
• All netlabels use net.GND, net.3V3, net.VBUS etc. for power rail connections

Test plan

• Open the MDX file in the Docusaurus dev server and verify all five <TscircuitIframe> blocks render without errors
• Confirm schematic view is the default (defaultView="schematic")
• Verify the complete schematic iframe shows all components without overlap

/claim tscircuit/docs-old#47

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	May 15, 2026 4:35pm

[tungnguyentu]

Update: Added a full components BOM table and cost estimate (~$3.62/unit at LCSC quantities).

This tutorial has 7 working TscircuitIframes — one per section — so readers can follow along with a live schematic at every step.