# Unacceptable Maroon Flubber ## Description Silent Gaude: 10 mm 4‑Layer ESP32-S3 LTE/GNSS Wearable Bracelet ## Project Details - **Owner:** urstrulyhariharan - **Created:** 12/11/2025 - **Last Updated:** 12/11/2025 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD power["Power Tree\nUSB-C, Charger, LiPo, 3V3 LDOs"] mcu["MCU\nESP32-S3"] lte["LTE/GNSS Module\nCat-M/Cat-1 + GNSS"] sensors["Sensors\nMAX3010x HR, MEMS Mic, Others"] conn["Connectors & I/O\nUSB-C, SIMs, Battery, Prog Pads"] power --> mcu power --> lte power --> sensors mcu <--> lte mcu <--> sensors mcu <--> conn lte <--> conn power <--> conn ``` ## Key Components ### D1 — [1N4148WS](https://www.flux.ai/adrian95/1n4148ws~uu.md) - Part Type: Diode - Datasheet URL: https://rocelec.widen.net/view/pdf/tf3dlteblx/FAIR-S-A0000573112-1.pdf?t.download=true&u=5oefqw - Role: Flyback / Freewheeling - Manufacturer Part Number: 1N4148WS - Role Details: Flyback diode for vibration motor driver - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### H1 — [Pin Header 01x05 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x05-254mm-vertical~cas.md) - Role Details: Programming header for ESP32-S3 programming interface beneath U1 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Connector - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] ### J5 — [U.FL-R-SMT-1(10)](https://www.flux.ai/jecstronic/upfl-r-smt-110~du.md) - Role Details: Antenna interface - Role: Connector - Manufacturer Part Number: U.FL-R-SMT-1(10) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/EDC3-302540-10.tif.pdf - Part Type: Connector - Manufacturer Name: Hirose Electric Co Ltd **Pins:** - Center_Contact [pin 2] - Outer_Contact [pin 1] - Outer_Contact [pin 3] ### J6 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB-C receptacle for charging and debug port - Manufacturer Name: Molex - Part Type: Connector - Manufacturer Part Number: 2024100002 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### J7 — [SIM connector](https://www.flux.ai/vasyl/sim-connector~vjy.md) - Package: Right Angle SMD 7-Pin Nano-SIM - Role: Connector - Role Details: Optional nano-SIM card connector for LTE module - Part Type: Connector **Pins:** - CD - CLK - GND - GND__1 - GND__2 - GND__3 - GND__4 - I/O - RST - VCC - VPP ### J8 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Role: Connector - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Battery connector for 100–150 mAh Li-Po battery **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### Q1 — [S8050](https://www.flux.ai/adrian95/s8050~wjp.md) - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: MDD - Manufacturer Part Number: S8050 - Role: Switching - Role Details: Switch transistor for vibration motor driver - Datasheet URL: https://pdf1.alldatasheet.com/datasheet-pdf/view/33773/WINGS/S8050.html **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### U1 — [ESP32-S3-MINI-1-N8](https://www.flux.ai/lcsc/esp32-s3-mini-1-n8~hi03.md) - Package or Case Code: BULETM-SMD_ESP32-S3-MINI-1-N8 - LCSC Part Number: C2913206 - Manufacturer Part Number: ESP32-S3-MINI-1-N8 - WS: IO7 - Part Type: WiFi Modules - Manufacturer Name: ESPRESSIF(乐鑫) - HAPTIC_EN_PIN: IO8 - Role: Microcontroller - Role Details: Main MCU for wearable **Pins:** - 3V3 [pin 3] - EN [pin 45] - GND [pin 1] - GND [pin 2] - GND [pin 42] - GND [pin 43] - GND [pin 46] - GND [pin 47] - GND [pin 48] - GND [pin 49] - GND [pin 50] - GND [pin 51] - GND [pin 52] - GND [pin 53] - GND [pin 54] - GND [pin 55] - GND [pin 56] - GND [pin 57] - GND [pin 58] - GND [pin 59] - GND [pin 60] - GND [pin GND] - IO0 [pin 4] - IO1 [pin 5] - IO10 [pin 14] - IO11 [pin 15] - IO12 [pin 16] - IO13 [pin 17] - IO14 [pin 18] - IO15 [pin 19] - IO16 [pin 20] - IO17 [pin 21] - IO18 [pin 22] - IO19 [pin 23] - IO2 [pin 6] - IO20 [pin 24] - IO21 [pin 25] - IO26 [pin 26] - IO3 [pin 7] - IO33 [pin 28] - IO34 [pin 29] - IO35 [pin 31] - IO36 [pin 32] - IO37 [pin 33] - IO38 [pin 34] - IO39 [pin 35] - IO4 [pin 8] - IO40 [pin 36] - IO41 [pin 37] - IO42 [pin 38] - IO45 [pin 41] - IO46 [pin 44] - IO47 [pin 27] - IO48 [pin 30] - IO5 [pin 9] - IO6 [pin 10] - IO7 [pin 11] - IO8 [pin 12] - IO9 [pin 13] - RXD0 [pin 40] - TXD0 [pin 39] ### U10 — [MCP1700T-3302E-TT](https://www.flux.ai/adrian95/mcp1700t-3302e-tt~h60.md) - Datasheet URL: https://datasheet.octopart.com/MCP1700T-3302E/TT-Microchip-datasheet-532260.pdf - Role: Power Conversion - Role Details: 3.3V LDO regulator - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MCP1700T-3302E/TT - Manufacturer Name: Microchip Technology **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] ### U11 — [MCP1700T-3302E-TT](https://www.flux.ai/adrian95/mcp1700t-3302e-tt~h60.md) - Datasheet URL: https://datasheet.octopart.com/MCP1700T-3302E/TT-Microchip-datasheet-532260.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 3.3V LDO regulator - Manufacturer Name: Microchip Technology - Manufacturer Part Number: MCP1700T-3302E/TT - Role: Power Conversion **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] ### U12 — [TPD4E02B04DQA](https://www.flux.ai/kicad-part-library/tpd4e02b04dqa~id.md) - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: USON-10_2.5x1.0mm_P0.5mm - Role: Protection - Role Details: ESD protection for USB-C data (D+, D-) and CC1/CC2 lines - Package: USON-10_2.5x1.0mm_P0.5mm - Manufacturer Part Number: TPD4E02B04DQA - Datasheet URL: http://www.ti.com/lit/ds/symlink/tpd4e02b04.pdf **Pins:** - G [pin 3] - G [pin 8] - IO1 [pin 1] - IO2 [pin 2] - IO3 [pin 4] - IO4 [pin 5] - NC [pin 7] - NC [pin 6] - NC [pin 9] - NC [pin 10] ### U13 — [TPD3E001DRLR](https://www.flux.ai/kicad-part-library/tpd3e001drlr~6l.md) - Datasheet URL: http://www.ti.com/lit/ds/symlink/tpd3e001.pdf - Package: SOT-553 - Package or Case Code: SOT-553 - Manufacturer Name: Texas Instruments Inc. - Role: Protection - Manufacturer Part Number: TPD3E001DRLR - Role Details: Low-capacitance ESD protection for LTE RF antenna line **Pins:** - ~ [pin 5] - ~ [pin 3] - IO1 [pin 1] - IO2 [pin 2] - IO3 [pin 4] ### U2 — [A7670C-LASE](https://www.flux.ai/lcsc/a7670c-lase~cbwy.md) - Role: Modulation / Demodulation - LCSC Part Number: C2888406 - Role Details: LTE/GNSS modem (U2) - Package: LGA-124_L24.0-W24.0-P1.0-A7670C-LASS - Manufacturer Part Number: A7670C-LASE - Manufacturer Name: SIMCOM(芯讯通无线科技) - Package or Case Code: LGA-124_L24.0-W24.0-P1.0-A7670C-LASS - JLCPCB Part Class: Extended Part **Pins:** - 1PPS [pin 100] - 1V8_GNSS [pin 97] - ADC [pin 25] - AP_WAKEUP [pin 3] - BT_ANT [pin 93] - EAR_N [pin 41] - EAR_P [pin 40] - GND [pin 17] - GND [pin 29] - GND [pin 39] - GND [pin 45] - GND [pin 59] - GND [pin 61] - GND [pin 63] - GND [pin 65] - GND [pin 69] - GND [pin 71] - GND [pin 73] - GND [pin 75] - GND [pin 77] - GND [pin 79] - GND [pin 81] - GND [pin 83] - GND [pin 85] - GND [pin 87] - GND [pin 89] - GND [pin 91] - GND [pin 2] - GND [pin 18] - GND [pin 46] - GND [pin 54] - GND [pin 58] - GND [pin 62] - GND [pin 64] - GND [pin 70] - GND [pin 72] - GND [pin 74] - GND [pin 76] - GND [pin 78] - GND [pin 80] - GND [pin 82] - GND [pin 84] - GND [pin 86] - GND [pin 88] - GND [pin 92] - GND [pin 94] - GNSS_ANT [pin 90] - GNSS_PWR_EN/MK_IN_3 [pin 20] - GNSS_PWRCTL [pin 98] - GNSS_RXD [pin 96] - GNSS_TXD [pin 95] - GNSS_VBKP [pin 116] - GPIO_00 [pin 4] - GPIO_01 [pin 5] - GPIO_02 [pin 6] - GPIO_03 [pin 7] - GPIO_04 [pin 8] - GPIO_05 [pin 19] - GPIO_07/MK_OUT_3 [pin 21] - GPIO_08 [pin 48] - GPIO_09 [pin 52] - GPIO_10 [pin 66] - GPIO_11/MK_OUT_5 [pin 67] - GPIO_12/MK_IN_5 [pin 68] - GPIO_13/MK_OUT_6 [pin 35] - GPIO_14/MK_IN_6 [pin 36] - GPIO_15/MK_OUT_2 [pin 44] - GPIO_16/MK_IN_2 [pin 47] - GPIO_17 [pin 26] - GPIO_18 [pin 53] - GPIO_19/LCD_BL_PWM [pin 101] - GPIO_20/LCD_SPI_CLK [pin 102] - GPIO_21/LCD_SPI_TXD [pin 103] - GPIO_22/LCD_SPI_RXD [pin 104] - GPIO_23/LCD_SPI_CS [pin 105] - GPIO_24/LCD_RST [pin 106] - GPIO_25/LCD_DCX [pin 107] - GPIO_26 [pin 117] - GPIO_27 [pin 118] - GPIO_28 [pin 119] - GPIO_29 [pin 120] - GPIO_30 [pin 121] - GPIO_31 [pin 122] - GPIO_32 [pin 123] - GPIO_33 [pin 124] - I2C_SCL [pin 38] - I2C_SDA [pin 37] - MIC_N [pin 43] - MIC_P [pin 42] - NC [pin 113] - NC [pin 115] - NC [pin 114] - PWRKEY [pin 1] - RESET [pin 16] - RF_ANT [pin 60] - RXD [pin 10] - SPI_CLK [pin 11] - SPI_CS [pin 12] - SPI_MISO [pin 14] - SPI_MOSI [pin 13] - TXD [pin 9] - UART_LOG_RX [pin 22] - UART_LOG_TX [pin 23] - UART3_RXD [pin 49] - UART3_TXD [pin 50] - USB_DM [pin 28] - USB_DP [pin 27] - USIM1_CLK [pin 32] - USIM1_DATA [pin 31] - USIM1_DET [pin 34] - USIM1_RST [pin 33] - USIM1_VDD [pin 30] - USIM2_CLK [pin 109] - USIM2_DATA [pin 108] - USIM2_DET [pin 112] - USIM2_RST [pin 111] - USIM2_VDD [pin 110] - VBAT [pin 55] - VBAT [pin 57] - VBAT [pin 56] - VBAT_ADC [pin 51] - VBUS [pin 24] - VDD_1V8 [pin 15] - VDD_2V8 [pin 99] ### U2 — [SARA-R510M8S-01B](https://www.flux.ai/jecstronic/sara-r510m8s-01b~8ua.md) - Manufacturer Name: u-blox - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: LTE Cat-M/Cat-1 + GNSS modem with MFF2 eSIM - Part Type: Module - Role: RF Transceiver - Datasheet URL: https://www.u-blox.com/en/docs/UBX-19016638 - Manufacturer Part Number: SARA-R510M8S-01B **Pins:** - ADC [pin 21] - ANT [pin 56] - ANT_DET [pin 62] - ANT_GNSS [pin 31] - CTS [pin 11] - DCD [pin 8] - DSR [pin 6] - DTR [pin 9] - EXT_INT [pin 33] - GND [pin 63] - GND [pin 82] - GND [pin 69] - GND [pin 67] - GND [pin 79] - GND [pin 72] - GND [pin 80] - GND [pin 95] - GND [pin 87] - GND [pin 93] - GND [pin 14] - GND [pin 58] - GND [pin 30] - GND [pin 55] - GND [pin 5] - GND [pin 43] - GND [pin 78] - GND [pin 1] - GND [pin 90] - GND [pin 68] - GND [pin 3] - GND [pin 22] - GND [pin 59] - GND [pin 81] - GND [pin 32] - GND [pin 94] - GND [pin 77] - GND [pin 86] - GND [pin 65] - GND [pin 75] - GND [pin 61] - GND [pin 66] - GND [pin 83] - GND [pin 92] - GND [pin 71] - GND [pin 91] - GND [pin 84] - GND [pin 88] - GND [pin 60] - GND [pin 96] - GND [pin 64] - GND [pin 50] - GND [pin 73] - GND [pin 20] - GND [pin 76] - GND [pin 85] - GND [pin 57] - GND [pin 70] - GND [pin 89] - GND [pin 54] - GND [pin 74] - GPIO1 [pin 16] - GPIO2 [pin 23] - GPIO3 [pin 24] - GPIO4 [pin 25] - GPIO5 [pin 42] - GPIO6 [pin 19] - I2S_CLK [pin 36] - I2S_RXD [pin 37] - I2S_TXD [pin 35] - I2S_WA [pin 34] - PWR_ON [pin 15] - RESET_N [pin 18] - RI [pin 7] - RSVD [pin 2] - RTS [pin 10] - RXD [pin 13] - SCL [pin 27] - SDA [pin 26] - SDIO_CLK [pin 45] - SDIO_CMD [pin 46] - SDIO_D0 [pin 47] - SDIO_D1 [pin 49] - SDIO_D2 [pin 44] - SDIO_D3 [pin 48] - SIM_CLK [pin 38] - SIM_IO [pin 39] - SIM_RST [pin 40] - TXD [pin 12] - USB_D- [pin 28] - USB_D+ [pin 29] - V_INT [pin 4] - VCC [pin 52] - VCC [pin 51] - VCC [pin 53] - VSIM [pin 41] - VUSB_DET [pin 17] ### U3 — [VIOT-1SIM-MFF2](https://www.flux.ai/vasyl/viot-1sim-mff2~v8.md) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4887/VIOT-1SIM-MFF2.pdf - Manufacturer Name: Velocity IoT - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: eSIM carrier footprint for MFF2 - Manufacturer Part Number: VIOT-1SIM-MFF2 - Part Type: RF and Wireless - Role: Connector **Pins:** - CLK [pin 6] - EPAD [pin 9] - GND [pin 1] - I/O [pin 3] - RST [pin 7] - VCC [pin 8] ### U4 — [RT9013-33GB](https://www.flux.ai/jecstronic/rt9013-33gb~xl8.md) - Part Type: Integrated Circuit - Role: Power Conversion - Manufacturer Part Number: RT9013-33GB - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809081207_Richtek-Tech-RT9013-33GB_C47773.pdf - Manufacturer Name: Richtek Tech - Role Details: Regulator for 3.3V rail **Pins:** - EN - GND - IN - NC - OUT ### U5 — [IM69D130V01XTSA1](https://www.flux.ai/vasy_skral/im69d130v01xtsa1~jk.md) - Manufacturer Name: Infineon Technologies - Part Type: Integrated Circuit - Datasheet URL: https://www.infineon.com/dgdl/Infineon-IM69D130-DS-v01_00-EN.pdf?fileId=5546d462602a9dc801607a0e46511a2e - Role Details: I2S MEMS microphone for audio input - Manufacturer Part Number: IM69D130V01XTSA1 - Role: Sensor **Pins:** - CLOCK [pin 3] - DATA [pin 1] - GND [pin 5] - SELECT [pin 4] - VDD [pin 2] ### U6 — [IM69D130V01XTSA1](https://www.flux.ai/vasy_skral/im69d130v01xtsa1~jk.md) - Manufacturer Part Number: IM69D130V01XTSA1 - Datasheet URL: https://www.infineon.com/dgdl/Infineon-IM69D130-DS-v01_00-EN.pdf?fileId=5546d462602a9dc801607a0e46511a2e - Role: Sensor - Part Type: Integrated Circuit - Manufacturer Name: Infineon Technologies - Role Details: I2S MEMS microphone for audio input **Pins:** - CLOCK [pin 3] - DATA [pin 1] - GND [pin 5] - SELECT [pin 4] - VDD [pin 2] ### U7 — [MAX30102EFD+T](https://www.flux.ai/vasy_skral/max30102efdplust~r7h.md) - Role: Sensor - Role Details: Heart-rate sensor via I2C interface to U1 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Part Number: MAX30102EFD+T - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX30102.pdf - Manufacturer Name: Maxim Integrated - Symbol Style: Parametric **Pins:** - ~INT [pin 13] - GND [pin 12] - IR_DRV [pin 6] - NC [pin 8] - NC [pin 14] - NC [pin 1] - NC [pin 7] - PGND [pin 4] - R_DRV [pin 5] - SCL [pin 2] - SDA [pin 3] - VDD [pin 11] - VLED+ [pin 10] - VLED+ [pin 9] ### U8 — [DRV2605LDGS](https://www.flux.ai/kicad-part-library/drv2605ldgs~ki5.md) - Datasheet URL: http://www.ti.com/lit/ds/symlink/drv2605l.pdf - Role: Switching - Manufacturer Part Number: DRV2605LDGS - Package or Case Code: VSSOP-10_3x3mm_P0.5mm - Role Details: Coin vibration motor driver via I2C interface to U1 - Manufacturer Name: Texas Instruments Inc. **Pins:** - EN [pin 5] - GND [pin 8] - IN/TRIG [pin 4] - OUT- [pin 9] - OUT+ [pin 7] - REG [pin 1] - SCL [pin 2] - SDA [pin 3] - VDD [pin 10] - VDD/NC [pin 6] ### U9 — [MAX1811](https://www.flux.ai/kicad-part-library/max1811~2ej.md) - Role Details: Li-ion battery charger for 100–150 mAh flat Li-Po battery - Package: SOIC-8_3.9x4.9mm_P1.27mm - Manufacturer Name: Maxim Integrated Products, Inc. - Package or Case Code: SOIC-8_3.9x4.9mm_P1.27mm - Role: Power Management - Manufacturer Part Number: MAX1811 - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX1811.pdf **Pins:** - ~{CHG} [pin 8] - BATT [pin 5] - EN [pin 7] - GND [pin 6] - GND [pin 3] - IN [pin 4] - SELI [pin 2] - SELV [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/urstrulyhariharan/unacceptable-maroon-flubber~u0](https://www.flux.ai/urstrulyhariharan/unacceptable-maroon-flubber~u0).* --- *Generated from [https://www.flux.ai/urstrulyhariharan/unacceptable-maroon-flubber~u0](https://www.flux.ai/urstrulyhariharan/unacceptable-maroon-flubber~u0)*