# Monitoreo fetal ## Description Portable Fetal Monitoring System with ESP32, AD8232 FECG Front-End, and MAX30102 PPG Sensor ## Project Details - **Owner:** brandontamayo - **Created:** 10/29/2025 - **Last Updated:** 11/3/2025 - **Visibility:** Public - **Power Requirements:** Battery - **Connectivity:** Bluetooth - **System Architecture:** graph LR PS(Power Subsystem) --> MCU[ESP32-WROOM-32D] PS --> Charger[TP4056 LiPo Charger] PS --> Regulator[MCP1700 3.3V LDO] PS --> Switch[Battery SPDT Switch] MCU --> USB[CP2102 USB-UART Bridge] MCU --> FECG[AD8232 FECG Front-End] MCU --> PPG[MAX30102 PPG Sensor] FECG --> Jack[3.5mm Electrode Jack] MCU --> UI[2N2222 Buzzer Driver] - **Power Requirements:** USB - **Connectivity:** WiFi - **License:** https://creativecommons.org/licenses/by/4.0/ - **Software:** Arduino - **Domain:** Medical ## Key Components ### — [1200 mAh Lipo Battery](https://www.flux.ai/middleagedmutantninjacoder/1200-mah-lipo-battery~ke.md) **Pins:** - - [pin 2] - + [pin 1] ### ESP32 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - Role: Signal Generation - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Main MCU, WiFi/Bluetooth Module - Manufacturer Part Number: ESP32-WROOM-32D - Part Type: Microcontroller **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] ### Modulo de carga — [TP4056](https://www.flux.ai/lcsc/tp4056~5yzc.md) - Manufacturer Part Number: TP4056 - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - JLCPCB Part Class: Extended Part - LCSC Part Number: C725790 - Role: Power Management - Product Info Url: https://lcsc.com/product-detail/PMIC-Battery-Management_UMW-Youtai-Semiconductor-Co-Ltd-TP4056_C725790.html - Manufacturer Name: UMW(友台半导体) - Part Type: Battery Management ICs - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409241408_UMW-Youtai-Semiconductor-Co---Ltd--TP4056_C725790.pdf - Role Details: LiPo Charger, USB-C input **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] ### Modulo ECG — [AD8232ACPZ-RL](https://www.flux.ai/lcsc/ad8232acpz-rl~oh06.md) - Package or Case Code: LFCSP-20_L4.0-W4.0-P0.50-TL-EP2.7 - LCSC Part Number: C652575 - Manufacturer Part Number: AD8232ACPZ-RL - JLCPCB Part Class: Extended Part - Part Type: Analog To Digital Converters (ADCs) - Role: Amplification - Role Details: FECG Front-End - Manufacturer Name: ADI(亚德诺) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2008191809_Analog-Devices-AD8232ACPZ-RL_C652575.pdf - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-Products_Analog-Devices_AD8232ACPZ-RL_Analog-Devices-ADI-LINEAR-AD8232ACPZ-RL_C652575.html **Pins:** - -IN [pin 3] - +IN [pin 2] - +VS [pin 17] - ~{SDN} [pin 13] - AC/~{DC} [pin 14] - EP [pin 21] - FR [pin 15] - GND [pin 16] - HPDRIVE [pin 1] - HPSENSE [pin 20] - IAOUT [pin 19] - LOD- [pin 11] - LOD+ [pin 12] - OPAMP- [pin 9] - OPAMP+ [pin 7] - OUT [pin 10] - REFIN [pin 18] - REFOUT [pin 8] - RLD [pin 5] - RLDFB [pin 4] - SW [pin 6] ### pulsioxímetro — [MAX30102EFD+T](https://www.flux.ai/vasy_skral/max30102efdplust~r7h.md) - Role: Sensor - Symbol Style: Parametric - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX30102.pdf - Manufacturer Name: Maxim Integrated - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: PPG Sensor, I2C interface - Manufacturer Part Number: MAX30102EFD+T - Part Type: Integrated Circuit **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] ### Q1 — [2N2222A](https://www.flux.ai/lcsc/2n2222a~00rk.md) - LCSC Part Number: C118536 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809200018_ST-Semtech-2N2222A_C118536.pdf - Compliance: RoHS - Role Details: Buzzer driver - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 2N2222A - Frequency: 250MHz - Package or Case Code: TO-92-3_L4.9-W3.7-P1.27-L - Transistor Type: NPN - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_2N2222_C118536.html - Role: Switching - Manufacturer Name: ST(先科) - Part Type: Transistors/Thyristors/Bipolar (BJT) **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### SPK11 — [FS1508MB0810-H8.0](https://www.flux.ai/lcsc/fs1508mb0810-h8p0~vh7h.md) - Product Info Url: https://lcsc.com/product-detail/Speakers_FUET-FS1508MB0810-H8-0_C969972.html - Manufacturer Name: FUET(福声科技) - Manufacturer Part Number: FS1508MB0810-H8.0 - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2012141208_FUET-FS1508MB0810-H8-0_C969972.pdf - Package or Case Code: BEEP-TH_BD15.0-P10.20-D1.2 - JLCPCB Part Class: Extended Part - Part Type: Speakers - LCSC Part Number: C969972 **Pins:** - 1 [pin 1] - 2 [pin 2] ### Switch — [450404015514](https://www.flux.ai/adrian95/450404015514~xol.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.we-online.com/components/products/datasheet/450404015514.pdf - Role: Switch - Manufacturer Name: Würth Elektronik - Role Details: Battery selection SPDT switch - Part Type: Switch - Manufacturer Part Number: 450404015514 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - MP1 [pin MP1] - MP2 [pin MP2] - MP3 [pin MP3] - MP4 [pin MP4] ### USB — [USB4115-03-C](https://www.flux.ai/adrian95/usb4115-03-c~000.md) - Datasheet URL: https://gct.co/files/drawings/usb4115.pdf - Manufacturer Part Number: USB4115-03-C - Role: Connector - Package or Case Code: USB411503C - Manufacturer Name: GCT (GLOBAL CONNECTOR TECHNOLOGY) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB-C receptacle for charging and data **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND_1 [pin A1] - GND_2 [pin A12] - GND_3 [pin B1] - GND_4 [pin B12] - MH1 [pin MH1] - MH2 [pin MH2] - MH3 [pin MH3] - MH4 [pin MH4] - MP1 [pin MP1] - MP2 [pin MP2] - 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_1 [pin A4] - VBUS_2 [pin A9] - VBUS_3 [pin B4] - VBUS_4 [pin B9] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/brandontamayo/monitoreo-fetal~tr](https://www.flux.ai/brandontamayo/monitoreo-fetal~tr).* --- *Generated from [https://www.flux.ai/brandontamayo/monitoreo-fetal~tr](https://www.flux.ai/brandontamayo/monitoreo-fetal~tr)*