# PI Metal Detector Pro ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** kolj - **Created:** 3/31/2026 - **Last Updated:** 4/1/2026 - **Visibility:** Public - **System Architecture:** flowchart TD USB["USB-C Input and USB-UART"] --> MCU["ESP32-S3 Controller"] USB --> PROT["USB ESD and TVS"] USB --> POWER["Buck Boost Power Stage"] POWER --> TXDRV["Gate Driver and MOSFET"] TXDRV --> COIL["Search Coil Connector"] COIL --> AFE["INA826 and MCP6001 Analog Front End"] AFE --> REF["2.5V Reference and Digipots"] REF --> ADC["ADS1256 Precision ADC"] ADC --> MCU MCU --> TFT["TFT Display"] MCU --> UI["Encoder and Buzzer"] ## Key Components ### D4 — [1N4148WS-7-F](https://www.flux.ai/adrian95/1n4148ws-7-f~jvm.md) - Manufacturer Part Number: 1N4148WS-7-F - Datasheet URL: https://www.diodes.com/assets/Datasheets/1N4148WS_BAV16WS.pdf - Manufacturer Name: Diodes Incorporated - Role Details: Clamp buzzer inductive kickback - Package: SOD-323 - Role: Flyback Protection - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode **Pins:** - A [pin 2] - K [pin 1] ### U1 — [ESP32-S3-WROOM-1-N16R8](https://www.flux.ai/adrian95/esp32-s3-wroom-1-n16r8~fs1.md) - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_wroom_1_wroom_1u_datasheet_en-2930317.pdf - Manufacturer Name: Espressif Systems - Package: Module - Manufacturer Part Number: ESP32-S3-WROOM-1-N16R8 - Part Type: Module - Role Details: Main ESP32-S3 controller from EDIF reconstruction - License: https://creativecommons.org/licenses/by/4.0/ - Role: Controller **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND_1 [pin 1] - GND_10 [pin 48] - GND_11 [pin 49] - GND_2 [pin 40] - GND_3 [pin 41] - GND_4 [pin 42] - GND_5 [pin 43] - GND_6 [pin 44] - GND_7 [pin 45] - GND_8 [pin 46] - GND_9 [pin 47] - IO0 [pin 27] - IO1 [pin 39] - IO10 [pin 18] - IO11 [pin 19] - IO12 [pin 20] - IO13 [pin 21] - IO14 [pin 22] - IO15 [pin 8] - IO16 [pin 9] - IO17 [pin 10] - IO18 [pin 11] - IO19 [pin 13] - IO2 [pin 38] - IO20 [pin 14] - IO21 [pin 23] - IO3 [pin 15] - IO35 [pin 28] - IO36 [pin 29] - IO37 [pin 30] - IO38 [pin 31] - IO39 [pin 32] - IO4 [pin 4] - IO40 [pin 33] - IO41 [pin 34] - IO42 [pin 35] - IO45 [pin 26] - IO46 [pin 16] - IO47 [pin 24] - IO48 [pin 25] - IO5 [pin 5] - IO6 [pin 6] - IO7 [pin 7] - IO8 [pin 12] - IO9 [pin 17] - RXD0 [pin 36] - TXD0 [pin 37] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/kolj/pi-metal-detector-pro~v6](https://www.flux.ai/kolj/pi-metal-detector-pro~v6).* --- *Generated from [https://www.flux.ai/kolj/pi-metal-detector-pro~v6](https://www.flux.ai/kolj/pi-metal-detector-pro~v6)*