# P-001_AnandKumar_IOTSentinels ## Description This Gerber file contains the necessary information for fabricating the PCB design of a Bluetooth-enabled headphone. The design includes multiple layers, showcasing the electrical connections and component placements on both the top and bottom layers. Top Layer (Copper traces and components): The top copper layer is primarily responsible for routing the signals from key components such as the ESP32 module, MAX98357A audio amplifier, and the microphone. The ESP32 module, responsible for Bluetooth communication, is positioned centrally to optimize signal flow and minimize interference. Decoupling capacitors (100nF) are placed near critical components to ensure signal stability and noise suppression. Audio signal paths, as well as power distribution, are carefully routed to prevent cross-talk and ensure high-quality sound. Bottom Layer (Copper traces): The bottom layer contains the ground plane and additional routing for power and signal connections. The charging module (TP4056) and voltage regulator (AMS1117) are placed to manage power distribution, ensuring stable battery charging and regulated output for the ESP32 and other components. Connections to external interfaces such as the MicroSD breakout and auxiliary input are routed efficiently to avoid conflicts. Additional Components: All critical components are labeled, including decoupling capacitors (100nF) and resistors where needed, as well as external interfaces like the MicroSD card breakout. Mounting holes are provided for secure installation in a headphone casing, ensuring the board can be integrated seamlessly into the final product. The PCB is designed to minimize noise, with short signal paths and proper grounding for high-fidelity audio performance. This Gerber file ensures accurate manufacturing by containing data for copper layers, silkscreen, solder mask, and drill files. ## Project Details - **Owner:** shivamnagpal - **Created:** 9/25/2024 - **Last Updated:** 2/10/2025 - **Visibility:** Public ## Key Components ### Apmlifier — [MAX9814ETD+T](https://www.flux.ai/vasyl/max9814etdplust~2cd.md) - Manufacturer Part Number: MAX9814ETD+T - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX9814.pdf - Part Type: Integrated Circuit - Manufacturer Name: Analog Devices Inc./Maxim Integrated **Pins:** - ~SHDN [pin 2] - A/R [pin 9] - BIAS [pin 12] - CG [pin 3] - CT [pin 1] - GAIN [pin 10] - GND [pin 4] - GND [pin 15] - GND [pin 11] - GND [pin 7] - MICBIAS [pin 13] - MICIN [pin 8] - MICOUT [pin 6] - TH [pin 14] - VDD [pin 5] ### Audio Amplifier — [MAX98357AETE+T](https://www.flux.ai/adrian95/max98357aeteplust~wk.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MAX98357AETE+T - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/max98357a-max98357b.pdf - Manufacturer Name: Analog Devices Inc./Maxim Integrated **Pins:** - ~SD_MODE [pin 4] - BCLK [pin 16] - DIN [pin 1] - GAIN_SLOT [pin 2] - GND_1 [pin 3] - GND_2 [pin 11] - GND_3 [pin 15] - LRCLK [pin 14] - N.C._1 [pin 5] - N.C._2 [pin 6] - N.C._3 [pin 12] - N.C._4 [pin 13] - OUTN [pin 10] - OUTP [pin 9] - THERMAL_PAD [pin 17] - VDD_1 [pin 7] - VDD_2 [pin 8] ### Charging module — [TP4056_Module](https://www.flux.ai/wolfxpac/tp4056module~ap.md) - Datasheet URL: https://robocraze.com/products/tp4056-lithium-battery-charging-board - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module - Manufacturer Name: Generic **Pins:** - BAT- [pin 5] - BAT+ [pin 6] - IN- [pin 1] - IN+ [pin 2] - OUT- [pin 3] - OUT+ [pin 4] ### ESP32 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-WROOM-32D - Part Type: Microcontroller - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - Manufacturer Name: Espressif Systems **Pins:** - 3.3V [pin 2] - AGND [pin 39] - CLK [pin 20] - CMD [pin 19] - EN [pin 3] - GND [pin 38] - GND [pin 15] - GND [pin 1] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 32] - RXD0 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 17] - SD3 [pin 18] - TXD0 [pin 35] - VN [pin 5] - VP [pin 4] ### Mic — [POM-3535P-3-R](https://www.flux.ai/adrian95/pom-3535p-3-r~wqq.md) - Manufacturer Name: PUI Audio, Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: POM-3535P-3-R - Part Type: Microphone - Datasheet URL: https://www.mouser.com/datasheet/2/334/POM-3535P-3-R-270441.pdf **Pins:** - 1 [pin N] - 2 [pin P] ### MicroSD — [1528-1462-ND](https://www.flux.ai/adrian95/1528-1462-nd~puv.md) - Manufacturer Name: Adafruit Industries LLC - Datasheet URL: https://www.mouser.com/datasheet/2/737/adafruit_micro_sd_breakout_board_card_tutorial-932877.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Breakout Board - Manufacturer Part Number: 254 **Pins:** - 3V [pin 7] - 5V [pin 8] - CD [pin 1] - CLK [pin 5] - CS [pin 2] - DI [pin 3] - DO [pin 4] - GND [pin 6] ### Voltage Regulator — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Symbol Style: Parametric - Manufacturer Part Number: AMS1117-3.3 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf - Manufacturer Name: AMS **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/shivamnagpal/p-001anandkumariotsentinels~db](https://www.flux.ai/shivamnagpal/p-001anandkumariotsentinels~db).* --- *Generated from [https://www.flux.ai/shivamnagpal/p-001anandkumariotsentinels~db](https://www.flux.ai/shivamnagpal/p-001anandkumariotsentinels~db)*