# ESP32-S3 8-Key Controller ## Description ESP32-S3 USB-C powered controller with eight user key buttons, native USB programming, 3.3V regulation, boot/reset controls, and firmware/bring-up documentation. ## Project Details - **Owner:** osamahfarhan - **Created:** 6/9/2026 - **Last Updated:** 6/9/2026 - **Visibility:** Public ## Key Components ### J1 — [USB4105-GF-A](https://www.flux.ai/adrian95/usb4105-gf-a~im9.md) - Role Details: USB-C sink/device connector for 5V VBUS and USB 2.0 data - Manufacturer Part Number: USB4105-GF-A - Manufacturer Name: GCT - Role: Connector - Symbol Style: parametric-v1 - Manufacturer Name: GCT - Part Type: USB C - Datasheet URL: https://gct.co/files/specs/usb4105-spec.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1_B12] - GND__1 [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHELL_GND [pin SH1] - SHELL_GND__1 [pin SH2] - SHELL_GND__2 [pin SH3] - SHELL_GND__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### SW1 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Package or Case Code: KEY-SMD_B3U-1000PM - Role: Human Interface - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Manufacturer Part Number: B3U-1000P - Voltage Rating: 12V - Role Details: Normally-open tactile switch, active-low to GND - Manufacturer Name: OMRON(欧姆龙) - Current Rating: 50mA - Switch Type: Tactile Switch - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Part Type: Tactile Switches - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - Throw Configuration: SPST-NO - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW10 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Role Details: Normally-open tactile switch, active-low to GND - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - Role: Human Interface - Throw Configuration: SPST-NO - JLCPCB Part Class: Extended Part - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Part Type: Tactile Switches - Voltage Rating: 12V - Manufacturer Part Number: B3U-1000P - Manufacturer Name: OMRON(欧姆龙) - Current Rating: 50mA - Switch Type: Tactile Switch - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Part Type: Tactile Switches - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - Throw Configuration: SPST-NO - JLCPCB Part Class: Extended Part - Role Details: Normally-open tactile switch, active-low to GND - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Manufacturer Part Number: B3U-1000P - Role: Human Interface - Voltage Rating: 12V - Manufacturer Name: OMRON(欧姆龙) - Current Rating: 50mA - Switch Type: Tactile Switch **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW3 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - Throw Configuration: SPST-NO - JLCPCB Part Class: Extended Part - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Part Type: Tactile Switches - Role: Human Interface - Voltage Rating: 12V - Manufacturer Part Number: B3U-1000P - Manufacturer Name: OMRON(欧姆龙) - Current Rating: 50mA - Switch Type: Tactile Switch - Role Details: Normally-open tactile switch, active-low to GND - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW4 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Package or Case Code: KEY-SMD_B3U-1000PM - Switch Type: Tactile Switch - Role Details: Normally-open tactile switch, active-low to GND - Voltage Rating: 12V - Manufacturer Part Number: B3U-1000P - Current Rating: 50mA - Manufacturer Name: OMRON(欧姆龙) - Part Type: Tactile Switches - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Role: Human Interface - JLCPCB Part Class: Extended Part - Throw Configuration: SPST-NO - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW5 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Package or Case Code: KEY-SMD_B3U-1000PM - Switch Type: Tactile Switch - Voltage Rating: 12V - Manufacturer Part Number: B3U-1000P - Manufacturer Name: OMRON(欧姆龙) - Current Rating: 50mA - Role: Human Interface - Part Type: Tactile Switches - Role Details: Normally-open tactile switch, active-low to GND - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - JLCPCB Part Class: Extended Part - Throw Configuration: SPST-NO - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW6 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Role: Human Interface - Voltage Rating: 12V - Manufacturer Part Number: B3U-1000P - Current Rating: 50mA - Manufacturer Name: OMRON(欧姆龙) - Switch Type: Tactile Switch - Operating Temperature: -25℃~ +70℃ - Role Details: Normally-open tactile switch, active-low to GND - Contact Material: Gold - Part Type: Tactile Switches - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - JLCPCB Part Class: Extended Part - Throw Configuration: SPST-NO **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW7 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - LCSC Part Number: C231329 - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - JLCPCB Part Class: Extended Part - Throw Configuration: SPST-NO - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Role: Human Interface - Part Type: Tactile Switches - Manufacturer Part Number: B3U-1000P - Role Details: Normally-open tactile switch, active-low to GND - Voltage Rating: 12V - Current Rating: 50mA - Manufacturer Name: OMRON(欧姆龙) - Switch Type: Tactile Switch - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW8 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Voltage Rating: 12V - Role Details: Normally-open tactile switch, active-low to GND - Manufacturer Part Number: B3U-1000P - Current Rating: 50mA - Manufacturer Name: OMRON(欧姆龙) - Switch Type: Tactile Switch - Package or Case Code: KEY-SMD_B3U-1000PM - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - LCSC Part Number: C231329 - Role: Human Interface - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - Throw Configuration: SPST-NO - JLCPCB Part Class: Extended Part - Operating Temperature: -25℃~ +70℃ - Contact Material: Gold - Part Type: Tactile Switches **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW9 — [B3U-1000P](https://www.flux.ai/lcsc/b3u-1000p~x798.md) - Role: Human Interface - Part Type: Tactile Switches - Contact Material: Gold - Operating Temperature: -25℃~ +70℃ - JLCPCB Part Class: Extended Part - Throw Configuration: SPST-NO - Product Info Url: https://lcsc.com/product-detail/Others_Omron-Electronics_B3U-1000P_Omron-Electronics-B3U-1000P_C231329.html - LCSC Part Number: C231329 - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Package or Case Code: KEY-SMD_B3U-1000PM - Switch Type: Tactile Switch - Current Rating: 50mA - Manufacturer Name: OMRON(欧姆龙) - Manufacturer Part Number: B3U-1000P - Voltage Rating: 12V - Role Details: Normally-open tactile switch, active-low to GND **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-S3-WROOM-1-N8R8](https://www.flux.ai/lcsc/esp32-s3-wroom-1-n8r8~law5.md) - Current - Receiving: 97mA ~ 100mA - Manufacturer Name: ESPRESSIF(乐鑫) - Manufacturer Part Number: ESP32-S3-WROOM-1-N8R8 - Datasheet URL: https://www.lcsc.com/datasheet/C2913201.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VWXlNTRlJdUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Role Details: ESP32-S3 module, 3.3V rail peak budget 330mA WiFi TX plus button inputs - Role: MCU - Frequency: 2.4GHz - Package or Case Code: WIRELM-SMD_ESP32-S3-WROOM-1 - LCSC Part Number: C2913201 - Voltage Supply: 3V ~ 3.6V - Symbol Style: parametric-v1 - Current - Transmitting: 273mA ~ 330mA - Operating Temperature: -40°C ~ 65°C (TA) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module - JLCPCB Part Class: Extended Part **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 41_6] - GND [pin 41_1] - GND [pin 41_4] - GND [pin 41_9] - GND [pin 40] - GND [pin 41_2] - GND [pin 41_7] - GND [pin 41_3] - GND [pin 41_5] - GND [pin 1] - GND [pin 41_8] - 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] ### U2 — [AP2112K-3.3TRG1](https://www.flux.ai/adrian95/ap2112k-33trg1~zlq.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AP2112K-3.3TRG1 - Role: Voltage Regulator - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Symbol Style: parametric-v1 - Role Details: 3.3V LDO; sized for ~340mA peak load, below 600mA rating - Manufacturer Name: Diodes Incorporated **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/osamahfarhan/esp32-s3-8-key-controller~r6](https://www.flux.ai/osamahfarhan/esp32-s3-8-key-controller~r6).* --- *Generated from [https://www.flux.ai/osamahfarhan/esp32-s3-8-key-controller~r6](https://www.flux.ai/osamahfarhan/esp32-s3-8-key-controller~r6)*