# ESP32\-S3 Vibration & Audio Sensor

## Description

Battery\-powered ESP32\-S3 vibration and audio sensor with native USB\-C, LiPo charging/power\-path, IIS3DWB SPI accelerometer, and INMP441 I2S microphone\.

## Project Details

- **Owner:** fastmanu
- **Created:** 7/31/2026
- **Last Updated:** 10/22/2026
- **Visibility:** Public
- **Human Interface:** Buttons
- **Connectivity:** USB\-C
- **Operating Voltage:** 3\.3V
- **Domain:** IoT
- **Power Requirements:** Battery
- **Implementation Details:** Stage\-1 schematic; provisional rectangular PCB with four mounting holes, dimensions TBD before layout

## Key Components

### D1 — [USBLC6\-2SC6](https://flux.ai/vasy_skral/usblc6-2sc6~g1b.md)

- Manufacturer Part Number: USBLC6\-2SC6
- Role: ESD Protection
- Symbol Style: parametric\-v1
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Protection
- Manufacturer Name: STMicroelectronics
- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/06/1d/48/9c/6c/20/4a/b2/CD00050750\.pdf/files/CD00050750\.pdf/jcr:content/translations/en\.CD00050750\.pdf
- LCSC Part Number: C7519
- Role Details: Low\-capacitance USB 2\.0 differential\-line protection

**Pins:**
- GND [pin 2]
- I/O1 [pin 6]
- I/O1 [pin 1]
- I/O2 [pin 3]
- I/O2 [pin 4]
- VBUS [pin 5]

### D2 — [SMF5\.0A](https://flux.ai/lcsc/smf5p0a~bz6b.md)

- Package or Case Code: SOD\-123FL\_L2\.8\-W1\.8\-LS3\.6\-RD
- JLCPCB Part Class: Extended Part
- Role Details: 5V VBUS TVS after input fuse
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2990427\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRTlBbUVFXRldaXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- LCSC Part Number: C2990427
- Diode Type: Schottky Diode
- Part Type: TVS
- Max Reverse Voltage: 5V
- Manufacturer Name: Liown\(里阳半导体\)
- Manufacturer Part Number: SMF5\.0A
- Role: Surge Protection
- Forward Voltage: 0\.45V to 0\.55V \(at 1A\)V

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### F1 — [BSMD0805\-075\-6V](https://flux.ai/lcsc/bsmd0805-075-6v~mcvl.md)

- Part Type: Resettable Fuses
- Manufacturer Part Number: BSMD0805\-075\-6V
- LCSC Part Number: C883110
- Manufacturer Name: BHFUSE\(佰宏\)
- Package or Case Code: F0805
- Role: Overcurrent Protection
- Role Details: 0\.75A hold PPTC; low\-resistance protection above conservative 500mA managed input
- Product Info Url: https://lcsc\.com/product\-detail/PTC\-Resettable\-Fuses\_BHFUSE\-BSMD0805\-075\-6V\_C883110\.html
- JLCPCB Part Class: Extended Part
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2203021130\_BHFUSE\-BSMD0805\-075\-6V\_C883110\.pdf

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J1 — [USB4105\-GF\-A](https://flux.ai/adrian95/usb4105-gf-a~im9.md)

- Part Type: USB C
- License: https://creativecommons\.org/licenses/by/4\.0/
- Symbol Style: parametric\-v1
- Role Details: USB 2\.0 device data and 5V input
- Manufacturer Name: GCT
- Manufacturer Name: GCT
- Datasheet URL: https://gct\.co/files/specs/usb4105\-spec\.pdf
- Role: External Connector
- Manufacturer Part Number: USB4105\-GF\-A

**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]

### J2 — [S2B\-PH\-K\-S](https://flux.ai/jecstronic/s2b-ph-k-s~2tt.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: JST\-PH side\-entry; pin 1 BAT\_PLUS, pin 2 GND; mating direction kept unobstructed
- Manufacturer Part Number: S2B\-PH\-K\-S
- Role: Battery Connector
- Functional Group: Battery Input
- Manufacturer Name: JST Sales America Inc\.
- Part Type: Connector
- Datasheet URL: https://www\.jst\-mfg\.com/product/pdf/eng/ePH\.pdf

**Pins:**
- PIN1 [pin 1]
- PIN2 [pin 2]

### M1 — [INMP441](https://flux.ai/vasyl/inmp441~ltf.md)

- Manufacturer Name: TDK InvenSense
- Part Type: Microphone
- Role Details: INMP441 mono I2S microphone, left channel
- Datasheet URL: https://invensense\.tdk\.com/wp\-content/uploads/2015/02/INMP441\.pdf?ref\_disty=digikey
- Role: Audio Sensor
- Manufacturer Part Number: INMP441
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- GND [pin 1]
- L/R [pin 4]
- SCK [pin 6]
- SD [pin 3]
- VDD [pin 2]
- WS [pin 5]

### SW1 — [B3F\-1020](https://flux.ai/adrian95/b3f-1020~wrk.md)

- Functional Group: User Controls
- Role: User Control
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: BOOT: top\-actuated momentary SPST\-NO, pulls GPIO0 low
- Manufacturer Part Number: B3F\-1020
- Manufacturer Name: Omron Electronics Inc\-EMC Div
- Part Type: Switch
- Datasheet URL: https://omronfs\.omron\.com/en\_US/ecb/products/pdf/en\-b3f\.pdf

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### SW2 — [B3F\-1020](https://flux.ai/adrian95/b3f-1020~wrk.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: B3F\-1020
- Manufacturer Name: Omron Electronics Inc\-EMC Div
- Part Type: Switch
- Datasheet URL: https://omronfs\.omron\.com/en\_US/ecb/products/pdf/en\-b3f\.pdf
- Role Details: RESET: top\-actuated momentary SPST\-NO, pulls EN low
- Role: User Control
- Functional Group: User Controls

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### SW3 — [B3F\-1020](https://flux.ai/adrian95/b3f-1020~wrk.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: B3F\-1020
- Manufacturer Name: Omron Electronics Inc\-EMC Div
- Part Type: Switch
- Role: User Control
- Datasheet URL: https://omronfs\.omron\.com/en\_US/ecb/products/pdf/en\-b3f\.pdf
- Role Details: USER\_SW3: momentary active\-low GPIO7 input; terminals 1/2 signal, 3/4 GND
- Functional Group: User Controls

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### SW4 — [B3F\-1020](https://flux.ai/adrian95/b3f-1020~wrk.md)

- Role: User Control
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: B3F\-1020
- Manufacturer Name: Omron Electronics Inc\-EMC Div
- Part Type: Switch
- Datasheet URL: https://omronfs\.omron\.com/en\_US/ecb/products/pdf/en\-b3f\.pdf
- Functional Group: User Controls
- Role Details: USER\_SW4: momentary active\-low GPIO8 input; terminals 1/2 signal, 3/4 GND

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### U1 — [ESP32\-S3\-WROOM\-1\-N16R8](https://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
- Role: Main Controller
- Role Details: ESP32\-S3 module; 600mA peak 3\.3V rail budget
- Symbol Style: parametric\-v1
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: ESP32\-S3\-WROOM\-1\-N16R8
- Part Type: Module
- Manufacturer Name: Espressif Systems

**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]

### U2 — [BQ24074RGTT](https://flux.ai/lcsc/bq24074rgtt~fpyl.md)

- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/bq24074\.pdf
- Role: Battery Charger
- Part Type: Battery Management ICs
- JLCPCB Part Class: Extended Part
- Package: VQFN\-16 RGT \(3 mm × 3 mm\) with exposed thermal pad
- Implementation Details: Standalone single\-cell Li\-Ion/Li\-Polymer linear charger and power\-path management IC; 4\.2 V battery regulation, 4\.4 V OUT regulation, 10\.5 V OVP, 1\.5 A programmable fast charge/input current limit\.
- LCSC Part Number: C2861252
- Role Details: 500mA total USB input limit, 500mA nominal charge setting; DPPM prioritizes SYS load
- Operating Voltage: IN operating range 4\.35–10\.2 V for BQ24074; IN withstand/recommended range up to 26 V, abs max 28 V
- License: https://creativecommons\.org/licenses/by/4\.0/
- Symbol Style: parametric\-v1
- Operating Temperature: \-40 to 85°C
- Manufacturer Part Number: BQ24074RGTT
- Package or Case Code: VQFN\-16\_L3\.0\-W3\.0\-P0\.50\-TL\-EP1\.7
- Manufacturer Name: Texas Instruments

**Pins:**
- \~\{CE\} [pin 4]
- \~\{CHG\} [pin 9]
- \~\{PGOOD\} [pin 7]
- BAT [pin 2]
- BAT [pin 3]
- EN1 [pin 6]
- EN2 [pin 5]
- EP [pin 17]
- ILIM [pin 12]
- IN [pin 13]
- ISET [pin 16]
- ITERM [pin 15]
- OUT [pin 11]
- OUT [pin 10]
- TMR [pin 14]
- TS [pin 1]
- VSS [pin 8]

### U3 — [TPS63001DRCR](https://flux.ai/adrian95/tps63001drcr~325.md)

- Manufacturer Name: Texas Instruments
- Package or Case Code: 10\-VFDFN
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Voltage Regulator
- Manufacturer Part Number: TPS63001DRCR
- Part Type: Integrated Circuit
- Symbol Style: parametric\-v1
- Role Details: 3\.3V buck\-boost sized for 600mA peak load across 1S LiPo range
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tps63001\.pdf?ts=1616520267195&ref\_url=https%253A%252F%252Fwww\.ti\.com%252Fstore%252Fti%252Fen%252Fp%252Fproduct%252F%253Fp%253DTPS63001DRCT

**Pins:**
- EN [pin 6]
- EP [pin 11]
- FB [pin 10]
- GND [pin 9]
- L1 [pin 4]
- L2 [pin 2]
- PGND [pin 3]
- PS/SYNC [pin 7]
- VIN [pin 5]
- VINA [pin 8]
- VOUT [pin 1]

### U4 — [IIS3DWBTR](https://flux.ai/jecstronic/iis3dwbtr~peg.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Vibration Sensor
- Role Details: IIS3DWB 4\-wire SPI accelerometer
- Manufacturer Name: STMicroelectronics
- Part Type: Sensor
- Manufacturer Part Number: IIS3DWBTR
- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/group3/14/0e/2b/1d/77/d0/46/f6/DM00501492/files/DM00501492\.pdf/jcr:content/translations/en\.DM00501492\.pdf

**Pins:**
- CS [pin 12]
- GND [pin 6]
- GND [pin 7]
- INT1 [pin 4]
- INT2 [pin 9]
- Reserved [pin 2]
- Reserved [pin 3]
- Reserved [pin 11]
- Reserved [pin 10]
- SDI/SDO/SDA [pin 14]
- SDO/SA0 [pin 1]
- SPC/SCL [pin 13]
- VDD [pin 8]
- VDD\_IO [pin 5]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/fastmanu/esp32\-s3\-vibration\-and\-audio\-sensor\~ex](https://flux.ai/fastmanu/esp32-s3-vibration-and-audio-sensor~ex).*

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*Generated from [https://flux\.ai/fastmanu/esp32\-s3\-vibration\-and\-audio\-sensor\~ex](https://flux.ai/fastmanu/esp32-s3-vibration-and-audio-sensor~ex)*