# Brainstorm a new project with AI [Example] ## Description Secure Classroom Handheld Student-Response Device ## Project Details - **Owner:** kioda - **Created:** 11/25/2025 - **Last Updated:** 12/1/2025 - **Visibility:** Public - **Missing MPN Components:** Hole1, Hole2, Hole3, Hole4, GND, U5 SCL - R3 P1, J1 VBUS1 - J1 VBUS2, U1 3.3V - R4 P2, D1 GND - GND GND, U2 BAT - C8 P1, U1 IO17 - LED1 A_G, U1 IO0 - J2 JTMS, U1 IO16 - LED1 A_R, U3 OUT - U4 IN, U1 IO14 - SW2 1, U1 IO15 - SW4 1, J1 CC - R1 P1, D3 K - J1 VBUS, U1 IO13 - SW1 1, U6 WS - U1 IO26, U1 GND - J2 JTDI, J1 VBUS3 - U2 VCC, U6 SCK - U1 IO27, U1 IO18 - LED1 A_B, U1 IO12 - SW3 1, SW3 2 - SW4 2, U5 SDA - R4 P1, U6 SD - U1 IO33, J1 VCONN - R2 P1, U1 RXD0 - J2 NJTRST, U1 TXD0 - J2 RESET, U1 EN - J2 JTDO - **Connectivity:** WiFi - **Human Interface:** Switches - **Power Requirements:** USB - **Power Requirements:** Battery - **Stackup:** Standard 4 Layer - **Human Interface:** Display - **Connectivity:** Bluetooth - **Human Interface:** Buttons - **System Architecture:** flowchart TD Battery["1S Li-ion Battery"] --> Charger["Li-ion Charger (USB-C)"] Charger --> Buck["3.3V Buck Converter"] Buck --> MCU["Wi-Fi+BLE MCU"] Buck --> LDO["Optional Quiet LDO"] MCU --> Mic["PDM/I2S Microphone"] MCU --> Secure["I2C Secure Element"] MCU --> Buttons["2–3 Buttons"] MCU --> RGB["RGB LED"] MCU --> Mute["Mic Hard-Mute Switch"] USB_C["USB-C CC/ESD"] --> Charger - **Domain:** Consumer Electronics ## Key Components ### D1 — [USBLC6-4SC6](https://www.flux.ai/kicad-part-library/usblc6-4sc6~cr3.md) - Role: Protection - Role Details: ESD protection for USB-C CC and data lines - Manufacturer Part Number: USBLC6-4SC6 - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: SOT-23-6 - Datasheet URL: https://www.st.com/resource/en/datasheet/usblc6-4.pdf **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O2 [pin 3] - I/O3 [pin 4] - I/O4 [pin 6] - VBUS [pin 5] ### D2 — [B5819W](https://www.flux.ai/openpartlist/b5819w~cl.md) - Manufacturer Part Number: B5819W - Role: Protection - Part Type: Diode - Role Details: Reverse Polarity Protection Diode - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.mccsemi.com/pdf/Products/B5817W-B5819W(SOD-123).pdf - Manufacturer Name: Good-Ark Semiconductor **Pins:** - A [pin 2] - K [pin 1] ### D3 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj50a~a9w.md) - Role Details: TVS diode for main power input - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Package: DO-214AA - Manufacturer Name: Bourns Inc. - Role: Protection - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/SMBJ.pdf - Manufacturer Part Number: SMBJ5.0A **Pins:** - A [pin 2] - K [pin 1] ### J1 — [632723130112](https://www.flux.ai/adrian95/632723130112~90z.md) - Manufacturer Name: Würth Elektronik - Role Details: USB Type-C power and data connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Role: Connector - Datasheet URL: https://www.we-online.com/components/products/datasheet/632723130112.pdf - Manufacturer Part Number: 632723130112 **Pins:** - ~ [pin S3] - ~ [pin S2] - ~ [pin S4] - ~ [pin S1] - CC [pin A5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin A1] - GND1 [pin A12] - GND2 [pin B1] - GND3 [pin B12] - SBU1 [pin A8] - SBU2 [pin B8] - SSRXN1 [pin B10] - SSRXN2 [pin A10] - SSRXP1 [pin B11] - SSRXP2 [pin A11] - SSTXN1 [pin A3] - SSTXN2 [pin B3] - SSTXP1 [pin A2] - SSTXP2 [pin B2] - VBUS [pin A4] - VBUS1 [pin A9] - VBUS2 [pin B4] - VBUS3 [pin B9] - VCONN [pin B5] ### J2 — [Pin Header 01x06 2.54mm PROGRAMMING CONNECTOR](https://www.flux.ai/zalak201285/pin-header-01x06-2p54mm-programming-connector~ji.md) - Role Details: MCU programming/test header for ESP32: GND, 3.3V, EN, IO0, RXD0, TXD0 - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - JTCK [pin 2] - JTDI [pin 1] - JTDO [pin 3] - JTMS [pin 4] - NJTRST [pin 5] - RESET [pin 6] ### LED1 — [150505M173300](https://www.flux.ai/adrian95/150505m173300~yhl.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Indicator - Manufacturer Part Number: 150505M173300 - Role Details: RGB status indicator - Manufacturer Name: Wurth Elektronik - Package or Case Code: 150505M173300 - Part Type: LED - Datasheet URL: https://www.we-online.com/katalog/datasheet/150505M173300.pdf **Pins:** - A_B [pin 2] - A_G [pin 6] - A_R [pin 4] - K_B [pin 1] - K_G [pin 5] - K_R [pin 3] ### SW1 — [PTS636SK25SMTRLFS](https://www.flux.ai/lcsc/pts636sk25smtrlfs~5nst.md) - Manufacturer Part Number: PTS636SK25SMTRLFS - Manufacturer Name: C&K - Role: User Interface - LCSC Part Number: C2689642 - Role Details: Push button for user response - JLCPCB Part Class: Extended Part - Package or Case Code: KEY-SMD_L6.0-W3.5-LS8.7 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [PTS636SK25SMTRLFS](https://www.flux.ai/lcsc/pts636sk25smtrlfs~5nst.md) - LCSC Part Number: C2689642 - Manufacturer Part Number: PTS636SK25SMTRLFS - Manufacturer Name: C&K - Role: User Interface - Role Details: Push button for user response - JLCPCB Part Class: Extended Part - Package or Case Code: KEY-SMD_L6.0-W3.5-LS8.7 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW3 — [PTS636SK25SMTRLFS](https://www.flux.ai/lcsc/pts636sk25smtrlfs~5nst.md) - Role Details: Push button for user response - LCSC Part Number: C2689642 - Manufacturer Part Number: PTS636SK25SMTRLFS - Manufacturer Name: C&K - Role: User Interface - JLCPCB Part Class: Extended Part - Package or Case Code: KEY-SMD_L6.0-W3.5-LS8.7 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW4 — [K2-1107ST-A4DW-06](https://www.flux.ai/lcsc/k2-1107st-a4dw-06~so9f.md) - Package or Case Code: KEY-SMD_L6.2-W3.6-LS8.0 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_Korean-Hroparts-Elec-K2-1107ST-A4SW-06_C118141.html - Part Type: Tactile Switches - Role Details: Mic hard-mute switch - JLCPCB Part Class: Extended Part - Manufacturer Part Number: K2-1107ST-A4DW-06 - LCSC Part Number: C118141 - Switch Type: Slide Switch - Voltage Rating: 12V - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010003_Korean-Hroparts-Elec-K2-1107ST-A4DW-06_C118141.pdf - Contact Material: Silver - Current Rating: 0.3A - Throw Configuration: SPDT - Manufacturer Name: 韩国韩荣 - Role: Switch **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - Role Details: Main MCU supporting Wi-Fi, BLE with WPA2-Enterprise/EAP-TLS and PDM/I2S microphone interface - Manufacturer Part Number: ESP32-WROOM-32D - Part Type: Microcontroller - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ **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] ### U2 — [TP4056](https://www.flux.ai/vasy_skral/tp4056~xa.md) - Manufacturer Part Number: TP4056 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf - Role Details: Li-ion charger for single-cell battery - Manufacturer Name: NanJing Top Power ASIC Corp. - Part Type: Integrated Circuit - Role: Power Management **Pins:** - ~CHRG [pin 7] - ~STDBY [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] ### U3 — [LM2594M-3.3/NOPB](https://www.flux.ai/vasyl/lm2594m-33nopb~99.md) - Role Details: Main 3.3V buck converter - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm2594 - Part Type: Integrated Circuit - Manufacturer Part Number: LM2594M-3.3/NOPB - Role: Power Conversion **Pins:** - ~ON~/OFF [pin 5] - FB [pin 4] - GND [pin 6] - NC [pin 1] - NC [pin 2] - NC [pin 3] - OUT [pin 8] - VIN [pin 7] ### U4 — [LT1763](https://www.flux.ai/mr-bammby/lt1763~63.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Optional quiet LDO for sensitive domains - Datasheet URL: https://eu.mouser.com/datasheet/2/609/1763fh-3123364.pdf - Manufacturer Name: Analog Devices - Part Type: Power Management - Role: Power Management - Manufacturer Part Number: LT1763CS8-3.3#PBF **Pins:** - BYP [pin 4] - GND [pin 7] - GND [pin 6] - GND [pin 3] - IN [pin 8] - nSHDN [pin 5] - OUT [pin 1] - SENSE/ADJ [pin 2] ### U5 — [ATECC608A-MAHDA-S](https://www.flux.ai/lcsc/atecc608a-mahda-s~pqrd.md) - Manufacturer Name: MICROCHIP(美国微芯) - Role Details: Secure authentication element for EAP-TLS via I2C - JLCPCB Part Class: Extended Part - Package or Case Code: UDFN-8_L3.0-W2.0-P0.50-BL - LCSC Part Number: C616908 - Manufacturer Part Number: ATECC608A-MAHDA-S **Pins:** - EXP [pin 9] - GND [pin 4] - NC [pin 1] - NC [pin 2] - NC [pin 3] - NC [pin 7] - SCL [pin 6] - SDA [pin 5] - VCC [pin 8] ### U6 — [INMP441](https://www.flux.ai/vasyl/inmp441~ltf.md) - Manufacturer Name: TDK InvenSense - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microphone - Role: Sensing (Shunt) - Manufacturer Part Number: INMP441 - Role Details: Digital I2S MEMS microphone for audio input to MCU - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2015/02/INMP441.pdf?ref_disty=digikey **Pins:** - GND [pin 1] - L/R [pin 4] - SCK [pin 6] - SD [pin 3] - VDD [pin 2] - WS [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/kioda/brainstorm-a-new-project-with-ai-example~ah](https://www.flux.ai/kioda/brainstorm-a-new-project-with-ai-example~ah).* --- *Generated from [https://www.flux.ai/kioda/brainstorm-a-new-project-with-ai-example~ah](https://www.flux.ai/kioda/brainstorm-a-new-project-with-ai-example~ah)*