# SENTRY\-Node v1

## Description

Acoustic drone detection\-and\-alert device — PCB port of validated breadboard prototype\. ESP32\-S3\-WROOM\-1, 4× I2S MEMS mic plus\-array \(60mm baselines\), e\-paper, buzzer/motor/LED alerts, LoRa peer\-alert, USB\-C charge\+flash, 1S Li\-Po\. Detection \+ alert only\.

## Project Details

- **Owner:** agamrossen
- **Created:** 8/13/2026
- **Last Updated:** 8/16/2026
- **Visibility:** Public

## Key Components

### BZ1 — TMB12A03

- Role Details: Top\-side hand\-soldered active 3V buzzer; low\-side transistor driven
- Exclude from Pick & Place: true
- Package or Case Code: Through Hole D12mm P7\.6mm
- Manufacturer Name: Jiangsu Huaneng Electronics
- Role: Audible Alert
- Manufacturer Part Number: TMB12A03
- Functional Group: Alert Outputs
- Mount: Through Hole
- LCSC Part Number: C96222
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/526de50c330ae59bd0a34361fe60f9da44c092c6f41f7324d1a4c327072224f6\.pdf

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

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

- Manufacturer Part Number: USBLC6\-2SC6
- Role: 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: USBLC6\-2SC6 placed logically between J1 USB2 pins and USB\_DP/USB\_DN MCU stubs
- Functional Group: USB Entry

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

### D2 — [1N4148W\-13\-F](https://flux.ai/lcsc/1n4148w-13-f~5cuh.md)

- Manufacturer Name: DIODES\(美台\)
- LCSC Part Number: C112342
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: 1N4148W\-13\-F
- Package or Case Code: SOD\-123\_L2\.7\-W1\.6\-LS3\.7\-RD
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Diodes\-Incorporated\-1N4148W\-13\-F\_C112342\.pdf
- Functional Group: Alert Outputs
- Role: Flyback Protection
- Part Type: Switching Diode
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_DIODES\_1N4148W\-13\-F\_1N4148W\-13\-F\_C112342\.html
- Role Details: Cathode to 3V3\_SYS; anode to buzzer switched node

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

### D3 — [1N4148W\-13\-F](https://flux.ai/lcsc/1n4148w-13-f~5cuh.md)

- Role Details: Cathode to 3V3\_SYS motor pad; anode to switched motor pad
- Manufacturer Name: DIODES\(美台\)
- LCSC Part Number: C112342
- JLCPCB Part Class: Extended Part
- Role: Flyback Protection
- Manufacturer Part Number: 1N4148W\-13\-F
- Functional Group: Alert Outputs
- Package or Case Code: SOD\-123\_L2\.7\-W1\.6\-LS3\.7\-RD
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Diodes\-Incorporated\-1N4148W\-13\-F\_C112342\.pdf
- Part Type: Switching Diode
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_DIODES\_1N4148W\-13\-F\_1N4148W\-13\-F\_C112342\.html

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

### FB1 — [BLM18AG601SN1D](https://flux.ai/adrian95/blm18ag601sn1d~k47.md)

- Role: Choke \(EMI Filter\)
- LCSC Part Number: C19330
- Role Details: MIC rail filter; 600Ω @100MHz, 500mA rating, 0\.8Ω max DCR; \<10mA expected load gives \<8mV worst\-case DC drop
- Functional Group: MIC Rail Filter
- Manufacturer Name: Murata Electronics
- Part Type: Ferrite Bead
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: BLM18AG601SN1D
- Datasheet URL: https://www\.murata\.com/en\-us/products/productdata/8796738650142/ENFA0003\.pdf

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

### J1 — [TYPE\-C\-31\-M\-12](https://flux.ai/lcsc/type-c-31-m-12~0mos.md)

- Role: Power Conversion
- Functional Group: USB Entry
- LCSC Part Number: C165948
- Part Type: USB Connectors
- Product Info Url: https://lcsc\.com/product\-detail/USB\-Type\-C\_Korean\-Hroparts\-Elec\-TYPE\-C\-31\-M\-12\_C165948\.html
- Manufacturer Part Number: TYPE\-C\-31\-M\-12
- Manufacturer Name: 韩国韩荣
- JLCPCB Part Class: Extended Part
- Role Details: Sink/device port; VBUS feeds BQ24074 IN only; CC1/CC2 each use independent 5\.1kΩ pulldowns
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2410010003\_Korean\-Hroparts\-Elec\-TYPE\-C\-31\-M\-12\_C165948\.pdf
- Package or Case Code: USB\-C\_SMD\-TYPE\-C\-31\-M\-12

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin B1]
- GND [pin B12]
- GND [pin A12]
- GND [pin A1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SH [pin 0]
- SH [pin 2]
- SH [pin 1]
- SH [pin 3]
- VBUS [pin A4]
- VBUS [pin B4]
- VBUS [pin B9]
- VBUS [pin A9]

### J2 — [B2B\-PH\-SM4\-TB\(LF\)\(SN\)](https://flux.ai/lcsc/b2b-ph-sm4-tblfsn~g26h.md)

- Connector Rows: 1
- Manufacturer Part Number: B2B\-PH\-SM4\-TB\(LF\)\(SN\)
- Functional Group: Battery Interface
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_JST\-B2B\-PH\-SM4\-TB\-LF\-SN\_C160352\.pdf
- Connector Pitch: 2mm
- Role: Power Conversion
- Product Info Url: https://lcsc\.com/product\-detail/\_JST\_B2B\-PH\-SM4\-TB\-LF\-SN\_B2B\-PH\-SM4\-TB\-LF\-SN\_C160352\.html
- Manufacturer Name: JST
- LCSC Part Number: C160352
- Part Type: Wire To Board / Wire To Wire Connector
- Package or Case Code: CONN\-SMD\_B2B\-PH\-SM4\-TB\-LF\-SN
- JLCPCB Part Class: Extended Part
- Connector Positions: 4
- Connector Gender: Male
- Connector Type: Board to Board Connectors
- Role Details: JST\-PH 2\-pin battery connection: positive on VBAT, negative on GND

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

### LED1 — WS2812B\-V6

- Manufacturer Part Number: WS2812B\-V6
- Mount: Surface Mount
- Role Details: WS2812B\-V6 on 3V3\_SYS; GPIO16 through 330Ω to DIN
- Package or Case Code: SMD5050\-4P
- Functional Group: Alert Outputs
- Manufacturer Name: Worldsemi
- Role: Visual Alert
- Datasheet URL: https://www\.tme\.eu/Document/88f56341f2c21fd586036db245cb26cf/WS2812B\-V6\_V1\.4\_EN\.pdf
- LCSC Part Number: C52917433

**Pins:**
- DIN [pin 4]
- DOUT [pin 2]
- VDD [pin 1]
- VSS [pin 3]

### M1 — ICS\-43434

- Manufacturer Part Number: ICS\-43434
- LCSC Part Number: C5656610
- Role Details: West microphone; I2S\_SD\_A; LR strapped low for left channel
- Package or Case Code: LGA\-6 3\.5x2\.65mm bottom\-port
- Role: Acoustic Sensor
- Datasheet URL: https://www\.mouser\.com/datasheet/2/400/ds\_000069\_ics\_43434\_v1\_2\-2581173\.pdf
- Functional Group: Microphone Array
- Manufacturer Name: TDK

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

### M2 — ICS\-43434

- Manufacturer Part Number: ICS\-43434
- Functional Group: Microphone Array
- Package or Case Code: LGA\-6 3\.5x2\.65mm bottom\-port
- Role Details: East microphone; I2S\_SD\_A; LR strapped high for right channel
- Role: Acoustic Sensor
- Datasheet URL: https://www\.mouser\.com/datasheet/2/400/ds\_000069\_ics\_43434\_v1\_2\-2581173\.pdf
- Manufacturer Name: TDK
- LCSC Part Number: C5656610

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

### M3 — ICS\-43434

- Manufacturer Part Number: ICS\-43434
- Package or Case Code: LGA\-6 3\.5x2\.65mm bottom\-port
- Functional Group: Microphone Array
- Role Details: North microphone; I2S\_SD\_B; LR strapped low for left channel
- LCSC Part Number: C5656610
- Datasheet URL: https://www\.mouser\.com/datasheet/2/400/ds\_000069\_ics\_43434\_v1\_2\-2581173\.pdf
- Role: Acoustic Sensor
- Manufacturer Name: TDK

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

### M4 — ICS\-43434

- Manufacturer Part Number: ICS\-43434
- Package or Case Code: LGA\-6 3\.5x2\.65mm bottom\-port
- Role: Acoustic Sensor
- Role Details: South microphone; I2S\_SD\_B; LR strapped high for right channel
- Functional Group: Microphone Array
- Datasheet URL: https://www\.mouser\.com/datasheet/2/400/ds\_000069\_ics\_43434\_v1\_2\-2581173\.pdf
- Manufacturer Name: TDK
- LCSC Part Number: C5656610

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

### Q1 — MMBT2222ALT1G

- Manufacturer Part Number: MMBT2222ALT1G
- Manufacturer Name: ON Semiconductor
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/a7a899f183ecdf3aa23229057cc63fe6bba2ee2495c2be2d22652d8d26284c2f\.pdf
- Role Details: GPIO17\-controlled buzzer switch
- Role: Low\-Side Driver
- Package or Case Code: SOT\-23
- Functional Group: Alert Outputs
- LCSC Part Number: C82460

**Pins:**
- B [pin 1]
- C [pin 3]
- E [pin 2]

### Q2 — MMBT2222ALT1G

- Functional Group: Alert Outputs
- Manufacturer Part Number: MMBT2222ALT1G
- Role: Low\-Side Driver
- Manufacturer Name: ON Semiconductor
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/a7a899f183ecdf3aa23229057cc63fe6bba2ee2495c2be2d22652d8d26284c2f\.pdf
- LCSC Part Number: C82460
- Role Details: GPIO18\-controlled vibration motor switch
- Package or Case Code: SOT\-23

**Pins:**
- B [pin 1]
- C [pin 3]
- E [pin 2]

### S1 — [MK\-12C02\-G015](https://flux.ai/lcsc/mk-12c02-g015~ifyl.md)

- Manufacturer Name: G\-Switch\(品赞\)
- Manufacturer Part Number: MK\-12C02\-G015
- Package or Case Code: SW\-SMD\_G\-SWITCH\_MK\-12C02\-G015
- LCSC Part Number: C2911519
- Functional Group: Switched Buck\-Boost
- Role Details: Logic\-only SPDT slide switch; charger remains active while regulator EN is off
- Role: Switching
- JLCPCB Part Class: Extended Part
- Part Type: Slide Switches

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 7 [pin 7]

### SW2 — [K2\-1114SA\-A4SW\-06](https://flux.ai/lcsc/k2-1114sa-a4sw-06~74ma.md)

- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: K2\-1114SA\-A4SW\-06
- Functional Group: MCU Core
- Manufacturer Name: 韩国韩荣
- LCSC Part Number: C136662
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1810061013\_Korean\-Hroparts\-Elec\-K2\-1114SA\-A4SW\-06\_C136662\.pdf
- Role Details: RESET tactile shorts EN to GND
- Part Type: Tactile Switches
- Role: User Input
- Package or Case Code: KEY\-SMD\_4P\-L4\.8\-W4\.6\-P1\.70\-LS6\.2
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_K2\-1114SA\-A4SW\-06\_C136662\.html

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

### SW3 — [K2\-1114SA\-A4SW\-06](https://flux.ai/lcsc/k2-1114sa-a4sw-06~74ma.md)

- JLCPCB Part Class: Extended Part
- Role: User Input
- Functional Group: MCU Core
- Manufacturer Part Number: K2\-1114SA\-A4SW\-06
- Manufacturer Name: 韩国韩荣
- Role Details: BOOT tactile shorts GPIO0 to GND
- LCSC Part Number: C136662
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1810061013\_Korean\-Hroparts\-Elec\-K2\-1114SA\-A4SW\-06\_C136662\.pdf
- Part Type: Tactile Switches
- Package or Case Code: KEY\-SMD\_4P\-L4\.8\-W4\.6\-P1\.70\-LS6\.2
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_K2\-1114SA\-A4SW\-06\_C136662\.html

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

### SW4 — [TS\-1187A\-B\-A\-B](https://flux.ai/lcsc/ts-1187a-b-a-b~2qda.md)

- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XKB\-Enterprise\-TS\-1187\-B\-A\-A\_C318884\.html
- Role Details: Active\-low GPIO21 snooze input to GND
- JLCPCB Part Class: Basic Part
- LCSC Part Number: C318884
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_XKB\-Connection\-TS\-1187A\-B\-A\-B\_C318884\.pdf
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_4P\-L5\.1\-W5\.1\-P3\.70\-LS6\.5\-TL\-2
- Functional Group: Alert Outputs
- Role: User Input
- Manufacturer Name: XKB Connectivity\(中国星坤\)
- Manufacturer Part Number: TS\-1187A\-B\-A\-B

**Pins:**
- A [pin 1]
- B [pin 2]
- C [pin 3]
- D [pin 4]

### U1 — [BQ24074RGTR](https://flux.ai/vasyl/bq24074rgtr~yke.md)

- Manufacturer Part Number: BQ24074RGTR
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Name: Texas Instruments
- Role: Power Conversion
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Fbq24074
- Part Type: Battery Chargers
- Functional Group: Charger Power Path
- Role Details: BQ24074 USB500 posture; 500mA programmed charge target; USB VBUS connects only to IN; OUT powers switched buck\-boost input

**Pins:**
- \~CE [pin 4]
- \~CHG [pin 9]
- \~PGOOD [pin 7]
- BAT\_2 [pin 2]
- BAT\_3 [pin 3]
- EN1 [pin 6]
- EN2 [pin 5]
- EXP [pin 17]
- ILIM [pin 12]
- IN [pin 13]
- ISET [pin 16]
- ITERM [pin 15]
- OUT\_10 [pin 10]
- OUT\_11 [pin 11]
- TMR [pin 14]
- TS [pin 1]
- VSS [pin 8]

### U2 — [TPS63020DSJR](https://flux.ai/markwuflux/tps63020dsjr~bv.md)

- Manufacturer Name: Texas Instruments Inc\.
- Role: Power Conversion
- DPN: C15483
- Manufacturer Part Number: TPS63020DSJR
- Datasheet URL: https://datasheet\.lcsc\.com/lcsc/1809200040\_Texas\-Instruments\-TPS63020DSJR\_C15483\.pdf
- Functional Group: Switched Buck\-Boost
- Role Details: TI Figure 25 1\.5A topology; 1\.5uH, 3x10uF input \(12\.6uF effective at 4\.4V\), 3x22uF output \(\~45uF effective at 3\.3V\), 1MΩ/180kΩ feedback; validates frozen ≥1A rail

**Pins:**
- EN [pin 12]
- FB [pin 3]
- GND [pin 2]
- L1\_1 [pin 8]
- L1\_2 [pin 9]
- L2\_1 [pin 6]
- L2\_2 [pin 7]
- PG [pin 14]
- PGND\_1 [pin 15]
- PGND\_2 [pin 16]
- PGND\_3 [pin 17]
- PGND\_4 [pin 18]
- PGND\_5 [pin 19]
- PGND\_6 [pin 20]
- PGND\_7 [pin 21]
- PGND\_8 [pin 22]
- PGND\_9 [pin 23]
- PS/SYNC [pin 13]
- VIN\_1 [pin 10]
- VIN\_2 [pin 11]
- VINA [pin 1]
- VOUT\_1 [pin 4]
- VOUT\_2 [pin 5]

### U3 — [ESP32\-S3\-WROOM\-1\-N16R8](https://flux.ai/lcsc/esp32-s3-wroom-1-n16r8~s9kh.md)

- Role Details: Frozen ESP32\-S3\-WROOM\-1\-N16R8 controller; native USB and fixed GPIO map
- Manufacturer Part Number: ESP32\-S3\-WROOM\-1\-N16R8
- Package or Case Code: WIRELM\-SMD\_ESP32\-S3\-WROOM\-1
- JLCPCB Part Class: Extended Part
- Frequency: 2\.4GHz
- Operating Temperature: \-40°C \~ 65°C \(TA\)
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2913202\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VXVlNfRlBfUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- Supply Voltage: 3V \~ 3\.6V
- License: https://creativecommons\.org/licenses/by/4\.0/
- Current \- Receiving: 95mA \~ 97mA
- Manufacturer Name: ESPRESSIF\(乐鑫\)
- Symbol Style: parametric\-v1
- Current \- Transmitting: 285mA \~ 355mA
- Role: Microcontroller
- LCSC Part Number: C2913202
- Functional Group: MCU Core
- Part Type: RF Transceiver

**Pins:**
- 3V3 [pin 2]
- EN [pin 3]
- GND [pin 47]
- GND [pin 41]
- GND [pin 45]
- GND [pin 40]
- GND [pin 48]
- GND [pin 49]
- GND [pin 44]
- GND [pin 46]
- GND [pin 42]
- GND [pin 1]
- GND [pin 43]
- 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]

### U4 — [Ra\-01H](https://flux.ai/lcsc/ra-01h~wfgo.md)

- Manufacturer Part Number: Ra\-01H
- Manufacturer Name: Ai\-Thinker\(安信可\)
- Role: RF Transceiver
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2004022132\_Ai\-Thinker\-Ra\-01H\_C503593\.pdf
- LCSC Part Number: C503593
- Package or Case Code: WIRELM\-SMD\_RA\-01H
- Functional Group: LoRa Interface
- Role Details: Ai\-Thinker Ra\-01H SPI LoRa module; antenna only at ANT interface
- Part Type: LoRa Modules
- Product Info Url: https://lcsc\.com/product\-detail/Communication\-Modules\_Ai\-Thinker\-Ra\-01H\_C503593\.html
- JLCPCB Part Class: Extended Part

**Pins:**
- 3\.3V [pin 3]
- ANT [pin 1]
- DIO0 [pin 5]
- DIO1 [pin 6]
- DIO2 [pin 7]
- DIO3 [pin 8]
- DIO4 [pin 10]
- DIO5 [pin 11]
- GND [pin 9]
- GND [pin 2]
- GND [pin 16]
- MISO [pin 13]
- MOSI [pin 14]
- NSS [pin 15]
- RESET [pin 4]
- SCK [pin 12]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/agamrossen/sentry\-node\-v1\~wa](https://flux.ai/agamrossen/sentry-node-v1~wa).*

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*Generated from [https://flux\.ai/agamrossen/sentry\-node\-v1\~wa](https://flux.ai/agamrossen/sentry-node-v1~wa)*