# Handheld Lymphatic Pressure Device

## Description

Dispositivo de Masaje Linfático

## Project Details

- **Owner:** lauragutierrez
- **Created:** 4/16/2026
- **Last Updated:** 4/20/2026
- **Visibility:** Public

## Key Components

### BZ1 — [CPT\-9019S\-SMT\-TR](https://flux.ai/jecstronic/cpt-9019s-smt-tr~c1x.md)

- Manufacturer Name: CUI Devices
- Role Details: Externally driven piezo buzzer for fault/alarm indication under MCU control
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Alarm Buzzer
- Manufacturer Part Number: CPT\-9019S\-SMT\-TR
- Datasheet URL: https://www\.cuidevices\.com/product/resource/cpt\-9019s\-smt\-tr\.pdf
- Package: SMD Buzzer
- Part Type: Buzzer

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

### D1 — [SP0504BAHT](https://flux.ai/kicad-part-library/sp0504baht~aw7.md)

- Manufacturer Part Number: SP0504BAHT
- Manufacturer Name: Texas Instruments Inc\.
- Datasheet URL: http://www\.littelfuse\.com//media/files/littelfuse/technical%20resources/documents/data%20sheets/sp05xxba\.pdf
- Role: ESD Protection
- Package or Case Code: SOT\-23\-5
- Package: SOT\-23\-5
- Role Details: Protect USB\-C VBUS and CC lines against ESD/transients

**Pins:**
- A [pin 2]
- K [pin 1]
- K [pin 4]
- K [pin 3]
- K [pin 5]

### D2 — [NRVB130T1G](https://flux.ai/lcsc/nrvb130t1g~q43l.md)

- Manufacturer Part Number: NRVB130T1G
- Product Info Url: https://lcsc\.com/product\-detail/Schottky\-Barrier\-Diodes\-SBD\_ON\-Semicon\_NRVB130T1G\_ON\-Semicon\-ON\-NRVB130T1G\_C223580\.html
- Role: Flyback Protection
- Package: SOD\-123
- Reverse Voltage: 30V
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2410010333\_onsemi\-NRVB130T1G\_C223580\.pdf
- LCSC Part Number: C223580
- Forward Voltage: 0\.45V
- Manufacturer Name: onsemi\(安森美\)
- JLCPCB Part Class: Extended Part
- Part Type: Schottky Barrier Diodes \(SBD\)
- Package or Case Code: SOD\-123\_L2\.7\-W1\.6\-LS3\.7\-RD\-1
- Role Details: Clamps voltage transients from ERM motor switching
- Diode Type: Schottky Diode

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

### IC1 — [MCP73833T\-AMI/MF](https://flux.ai/jecstronic/mcp73833t-amimf~x9.md)

- Manufacturer Name: Microchip Technology
- Datasheet URL: https://ww1\.microchip\.com/downloads/en/DeviceDoc/22005b\.pdf
- Part Type: Integrated Circuit
- Package: DFN\-10\-EP
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: USB\-C powered single\-cell Li\-ion charger with status outputs and THERM input
- Role: Battery Charger
- Manufacturer Part Number: MCP73833T\-AMI/MF

**Pins:**
- \~PG\(\~TE\) [pin 7]
- EP [pin 11]
- PROG [pin 6]
- STAT1 [pin 3]
- STAT2 [pin 4]
- THERM [pin 8]
- VBAT\_1 [pin 9]
- VBAT\_2 [pin 10]
- VDD\_1 [pin 1]
- VDD\_2 [pin 2]
- VSS [pin 5]

### J1 — [USB4235\-03\-C](https://flux.ai/cherepanyadima/usb4235-03-c~sn.md)

- Part Type: Connectors
- Role Details: USB\-C 5V sink\-only connector with CC pins for charging input
- Role: Power Input Connector
- Datasheet URL: https://gct\.co/files/specs/usb4235\-spec\.pdf
- Manufacturer Name: GST
- Manufacturer Part Number: USB4235\-03\-C\_REVA
- Package: USB\-C SMT

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND\_A [pin A1]
- GND\_A\_\_1 [pin A12]
- GND\_B [pin B1]
- GND\_B\_\_1 [pin B12]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- VBUS\_A [pin A4]
- VBUS\_A\_\_1 [pin A9]
- VBUS\_B [pin B4]
- VBUS\_B\_\_1 [pin B9]

### LED1 — [0603GBD0790S01](https://flux.ai/adrian95/0603gbd0790s01~iak.md)

- Role Details: Green LED for normal or in\-range status indication
- Package: 0603
- Part Type: LED
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01\.pdf
- Manufacturer Part Number: 0603GBD0790S01
- Manufacturer Name: ORIENTAL TECHNOLOGY
- Role: Status LED
- License: https://creativecommons\.org/licenses/by/4\.0/

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

### LED2 — [KT\-0603R](https://flux.ai/adrian95/kt-0603r~7c.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Fault LED
- Manufacturer Name: Hubei KENTO Elec
- Manufacturer Part Number: KT\-0603R
- Role Details: Red LED for charging fault, overpressure, or protection status indication
- Part Type: LED
- Package: 0603
- Datasheet URL: https://www\.lcsc\.com/datasheet/lcsc\_datasheet\_1810231112\_Hubei\-KENTO\-Elec\-KT\-0603R\_C2286\.pdf

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

### MOT1 — [LCM1027A2445F](https://flux.ai/lcsc/lcm1027a2445f~bqgp.md)

- Package: SMD Motor
- Manufacturer Part Number: LCM1027A2445F
- Manufacturer Name: LEADER\(立得\)
- Package or Case Code: VIBRATING\-MOTOR\-SMD\_WELDING
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C2759984
- Part Type: Micro Motor & Motor
- Role: Haptic Motor
- Role Details: 2\-wire ERM vibration motor used as implementation placeholder for selected C1234BE03L27\-3\.7V

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

### Q1 — [2N7002K](https://flux.ai/jecstronic/2n7002k~8y.md)

- Manufacturer Name: MDD
- Part Type: Transistor
- Datasheet URL: https://www\.infineon\.com/dgdl/Infineon\-2N7002\-DS\-v02\_04\-en\.pdf
- Role Details: Logic\-driven low\-side NMOS for ERM haptic motor switching
- Package: SOT\-23
- Manufacturer Part Number: 2N7002K
- Role: Motor Switch
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- D [pin 3]
- G [pin 1]
- S [pin 2]

### Q2 — [2N7002K](https://flux.ai/jecstronic/2n7002k~8y.md)

- Manufacturer Name: MDD
- Part Type: Transistor
- Datasheet URL: https://www\.infineon\.com/dgdl/Infineon\-2N7002\-DS\-v02\_04\-en\.pdf
- Manufacturer Part Number: 2N7002K
- Role Details: Logic\-driven low\-side NMOS for piezo buzzer actuation
- Package: SOT\-23
- Role: Buzzer Switch
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- D [pin 3]
- G [pin 1]
- S [pin 2]

### RT1 — [NTCS0805E3103FMT](https://flux.ai/adrian95/ntcs0805e3103fmt~zas.md)

- Part Type: Thermistor
- Manufacturer Name: Vishay Beyschlag/Draloric/BC Components
- Package: 0805
- Role Details: 10k NTC used for thermal interlock and charger THERM monitoring
- Datasheet URL: https://www\.vishay\.com/docs/29044/ntcs0805e3t\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: NTCS0805E3103FMT
- Role: Thermal Sensor

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

### U1 — [ABX00083](https://flux.ai/adrian95/abx00083~mdb.md)

- Role Details: ESP32 Nano S3 main controller with ADC input, PWM outputs, USB, and wireless connectivity
- Manufacturer Name: Arduino
- Role: MCU
- Package: Module
- Datasheet URL: https://docs\.arduino\.cc/resources/datasheets/ABX00083\-datasheet\.pdf
- Manufacturer Part Number: ABX00083
- Part Type: Development Board
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- \+3V3\_ [pin 2]
- A0 [pin 4]
- A1 [pin 5]
- A2 [pin 6]
- A3 [pin 7]
- A4 [pin 8]
- A5 [pin 9]
- A6 [pin 10]
- A7 [pin 11]
- BOOT0 [pin 3]
- BOOT1 [pin 13]
- D0/TX [pin 16]
- D1/RX [pin 17]
- D10\_/\_CS [pin 28]
- D11\_/\_COPI [pin 29]
- D12\_/\_CIPO [pin 30]
- D13\_/\_SCK\_ [pin 1]
- D2 [pin 20]
- D3 [pin 21]
- D4 [pin 22]
- D5 [pin 23]
- D6 [pin 24]
- D7 [pin 25]
- D8 [pin 26]
- D9 [pin 27]
- GND\_1 [pin 14]
- GND\_2 [pin 19]
- RST [pin 18]
- VBUS [pin 12]
- VIN [pin 15]

### U2 — [MAX40200AUK\+T](https://flux.ai/jecstronic/max40200aukplust~uqg.md)

- Datasheet URL: https://datasheets\.maximintegrated\.com/en/ds/MAX40200\.pdf
- Package: SOT\-23\-5
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Integrated Circuit
- Role: Power Path
- Manufacturer Part Number: MAX40200AUK\+T
- Role Details: Ideal diode for battery\-to\-system low\-loss power path isolation
- Manufacturer Name: Analog Devices Inc\./Maxim Integrated

**Pins:**
- EN [pin 3]
- GND [pin 2]
- NC [pin 4]
- OUT [pin 5]
- VDD [pin 1]

### U3 — [MIC5504\-3\.3YM5](https://flux.ai/kicad-part-library/mic5504-3p3ym5~ud0.md)

- Package: SOT\-23\-5
- Datasheet URL: http://ww1\.microchip\.com/downloads/en/DeviceDoc/MIC550X\.pdf
- Manufacturer Part Number: MIC5504\-3\.3YM5
- Role: Voltage Regulator
- Package or Case Code: SOT\-23\-5
- Manufacturer Name: Microchip Technology Inc\.
- Role Details: 3\.3V LDO creating quiet rail for MCU, sensor divider, buzzer control, and indicators

**Pins:**
- EN [pin 3]
- GND [pin 2]
- NC [pin 4]
- VIN [pin 1]
- VOUT [pin 5]

### U4 — [S2B\-PH\-K\-S\(LF\)\(SN\)](https://flux.ai/lcsc/s2b-ph-k-slfsn~vk6f.md)

- Package or Case Code: CONN\-TH\_S2B\-PH\-K\-S\-LF\-SN
- Package: JST\-PH\-2
- Manufacturer Part Number: S2B\-PH\-K\-S\(LF\)\(SN\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_JST\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.pdf
- Role Details: Connector for single\-cell Li\-ion battery pack
- Part Type: Wire To Board / Wire To Wire Connector
- Role: Battery Connector
- Manufacturer Name: JST
- Product Info Url: https://lcsc\.com/product\-detail/PH\-Connectors\_JST\-Sales\-America\_S2B\-PH\-K\-S\-LF\-SN\_JST\-Sales\-America\-S2B\-PH\-K\-S\-LF\-SN\_C173752\.html
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C173752

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

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/lauragutierrez/handheld\-lymphatic\-pressure\-device\~gc](https://flux.ai/lauragutierrez/handheld-lymphatic-pressure-device~gc).*

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*Generated from [https://flux\.ai/lauragutierrez/handheld\-lymphatic\-pressure\-device\~gc](https://flux.ai/lauragutierrez/handheld-lymphatic-pressure-device~gc)*