# ESP32-S3 Piezo TX RX Board ## Description Compact 2-layer ESP32-S3-MINI-1 piezo TX/RX board for a shared 3 MHz transducer node. Includes USB 5 V input, TP4056 single-cell LiPo charging, TLV75533 3.3 V regulation, ferrite-bead isolated 3V3_ANALOG rail, ~12 V pulsed TX boost rail, low-gate-charge NMOS transmit driver, clamp-protected RX input, 2-stage OPA836 analog receive chain, envelope detector, ADC interface, TMP117 I2C temperature sensor, and status LEDs. Layout intent: piezo centered, RX chain within 10 mm of PIEZO_NODE, boost section remote from RX, digital and analog partitioning, and AGND/DGND star connection near RX front end. ## Project Details - **Owner:** roworx3d193 - **Created:** 4/13/2026 - **Last Updated:** 4/14/2026 - **Visibility:** Public ## Key Components ### D1 — [BAT43W-V-GS08](https://www.flux.ai/jecstronic/bat43w-v-gs08~9i.md) - Datasheet URL: https://octopart.com/datasheet/bat43w-v-gs08-vishay-42189233 - Part Type: Diode - Package: SOD-123 - Role Details: Schottky clamps limiting RX front-end input excursion to analog rails - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BAT43W-V-GS08 - Manufacturer Name: Vishay - Role: Clamp Diode **Pins:** - A [pin 2] - K [pin 1] ### D2 — [BAT43W-V-GS08](https://www.flux.ai/jecstronic/bat43w-v-gs08~9i.md) - Datasheet URL: https://octopart.com/datasheet/bat43w-v-gs08-vishay-42189233 - Part Type: Diode - Package: SOD-123 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Schottky clamps limiting RX front-end input excursion to analog rails - Manufacturer Part Number: BAT43W-V-GS08 - Role: Clamp Diode - Manufacturer Name: Vishay **Pins:** - A [pin 2] - K [pin 1] ### FB1 — [BLM18PG471SN1D](https://www.flux.ai/jecstronic/blm18pg471sn1d~jxq.md) - Datasheet URL: https://www.murata.com/en-us/products/productdata/8796738650142/ENFA0003.pdf - Package: 0603 - Role: Ferrite Bead - Role Details: Isolates 3V3_ANALOG from 3V3_MAIN to reduce digital and switching noise - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BLM18PG471SN1D - Part Type: Ferrite Bead - Manufacturer Name: Murata Electronics **Pins:** - 1 [pin 1] - 2 [pin 2] ### IC1 — [TLV75533PDBVR](https://www.flux.ai/adrian95/tlv75533pdbvr~jy8.md) - Role Details: Generates 3V3_MAIN from battery rail for MCU and support circuits - Package: SOT-23-5 - Package or Case Code: SOT95P280X145-5N - Manufacturer Part Number: TLV75533PDBVR - Role: 3.3V Regulator - License: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftlv755p - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftlv733p **Pins:** - BP [pin 4] - EN [pin 3] - GND [pin 2] - VIN [pin 1] - VOUT [pin 5] ### J1 — [UJ20-C-H-G-SMT-2-P16-TR](https://www.flux.ai/adrian95/uj20-c-h-g-smt-2-p16-tr~v05.md) - Manufacturer Name: Same Sky (Formerly CUI Devices) - Manufacturer Part Number: UJ20-C-H-G-SMT-2-P16-TR - Role: USB Power Input - Role Details: 5V power-only USB-C receptacle with CC pins for sink configuration - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Package: USB-C Receptacle - Datasheet URL: https://www.sameskydevices.com/product/resource/uj20-c-h-g-smt-2-p16-tr.pdf - Mount: Surface Mount **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] - SHIELD [pin SH1] - SHIELD__1 [pin SH2] - SHIELD__2 [pin SH3] - SHIELD__3 [pin SH4] - VBUS [pin A4_B9] - VBUS__1 [pin B4_A9] ### Q1 — [AO3400A](https://www.flux.ai/lcsc/ao3400a~e5y2.md) - Continuous Drain Current: 5.7A - Role: TX MOSFET - Package: SOT-23-3 - Role Details: Fast low-gate-charge NMOS pulsing the piezo from boosted 12V rail under 3.3V gate drive - Part Type: MOSFETs - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010301_UMW-Youtai-Semiconductor-Co---Ltd--AO3400A_C347475.pdf - Manufacturer Part Number: AO3400A - Power: 1.4W - Product Info Url: https://lcsc.com/product-detail/Others_Youtai-Semiconductor-Co-Ltd-AO3400A-5-8A_C347475.html - Operating Temperature: -55 ~ +150℃ - Package or Case Code: SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR - Drain to Source Voltage: 30V - JLCPCB Part Class: Extended Part - Manufacturer Name: UMW(友台半导体) - Transistor Type: N-channel MOSFET - LCSC Part Number: C347475 **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — [ESP32-S3-MINI-1-N8](https://www.flux.ai/jecstronic/esp32-s3-mini-1-n8~m3d.md) - Part Type: Module - Manufacturer Part Number: ESP32-S3-MINI-1-N8 - Role Details: ESP32-S3 module handling TX timing, ADC sampling, I2C sensor interface, status LEDs, and control logic - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_mini_1_mini_1u_datasheet_en-2997643.pdf - Manufacturer Name: Espressif Systems - Package: Module - Role: Main MCU - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 3V3 [pin 3] - EN [pin 45] - GND [pin 2] - GND [pin 60] - GND [pin 49] - GND [pin 61_6] - GND [pin 59] - GND [pin 46] - GND [pin 47] - GND [pin 43] - GND [pin 61_1] - GND [pin 61] - GND [pin 61_3] - GND [pin 42] - GND [pin 57] - GND [pin 64] - GND [pin 1] - GND [pin 52] - GND [pin 61_8] - GND [pin 61_5] - GND [pin 48] - GND [pin 61_2] - GND [pin 51] - GND [pin 58] - GND [pin 56] - GND [pin 61_4] - GND [pin 63] - GND [pin 65] - GND [pin 53] - GND [pin 61_7] - GND [pin 55] - GND [pin 50] - GND [pin 54] - GND [pin 62] - 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] ### U2 — [TP4056](https://www.flux.ai/vasy_skral/tp4056~xa.md) - Manufacturer Name: NanJing Top Power ASIC Corp. - Datasheet URL: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf - Manufacturer Part Number: TP4056 - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Charges LiPo cell from USB 5V and provides charge status outputs - Package: SOP-8 - Role: Battery Charger **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] ### U3 — [MP3437GJ-Z](https://www.flux.ai/monolithicpower/mp3437gj-z~2v.md) - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP3437 - Manufacturer Part Number: MP3437GJ-Z - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/3533?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/m/p/mp3437_tac.jpg - Package: TSOT-23-8 - Role: Boost Converter - Role Details: Generates approximately 12V transmit rail from LiPo battery for pulsed piezo drive - Package or Case Code: TSOT23-8_MP3437_MNP - Manufacturer Name: Monolithic Power Systems **Pins:** - BST [pin 1] - EN [pin 7] - FB [pin 5] - GND [pin 4] - SW [pin 3] - VDD [pin 6] - VIN [pin 8] - VOUT [pin 2] ### U4 — [OPA836IDBVR](https://www.flux.ai/lcsc/opa836idbvr~h3lt.md) - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Part Type: Operational Amplifier - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Low-Power-OpAmps_TI_OPA836IDBVR_OPA836IDBVR_C111589.html - Manufacturer Part Number: OPA836IDBVR - Package: SOT-23-6 - Role Details: Two high-speed amplifier stages for 3 MHz piezo receive chain and envelope detection source conditioning - Manufacturer Name: TI(德州仪器) - Role: Receive Amplifier - LCSC Part Number: C111589 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811022128_Texas-Instruments-OPA836IDBVR_C111589.pdf **Pins:** - PD [pin 5] - VIN- [pin 4] - VIN+ [pin 3] - VOUT [pin 1] - VS- [pin 2] - VS+ [pin 6] ### U5 — [OPA836IDBVR](https://www.flux.ai/lcsc/opa836idbvr~h3lt.md) - Package: SOT-23-6 - Product Info Url: https://lcsc.com/product-detail/Low-Power-OpAmps_TI_OPA836IDBVR_OPA836IDBVR_C111589.html - JLCPCB Part Class: Extended Part - Manufacturer Part Number: OPA836IDBVR - Role: Receive Amplifier - Role Details: Two high-speed amplifier stages for 3 MHz piezo receive chain and envelope detection source conditioning - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Part Type: Operational Amplifier - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811022128_Texas-Instruments-OPA836IDBVR_C111589.pdf - LCSC Part Number: C111589 - Manufacturer Name: TI(德州仪器) **Pins:** - PD [pin 5] - VIN- [pin 4] - VIN+ [pin 3] - VOUT [pin 1] - VS- [pin 2] - VS+ [pin 6] ### U6 — [TMP117AIDRVR](https://www.flux.ai/lcsc/tmp117aidrvr~2nvt.md) - Role Details: High-accuracy temperature monitor connected to ESP32 over I2C - Package or Case Code: WSON-6_L2.0-W2.0-P0.65-TL-EP - LCSC Part Number: C699536 - Package: WSON-6 - Voltage Supply: 1.8V ~ 5.5V - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: TMP117AIDRVR - Part Type: Temperature Sensors - Sensor Type: Digital, Local - JLCPCB Part Class: Extended Part - Operating Temperature: -55°C ~ 150°C (TA) - Role: Temperature Sensor **Pins:** - ADD0 [pin 4] - ALERT [pin 3] - EP [pin 7] - GND [pin 2] - SCL [pin 1] - SDA [pin 6] - V+ [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/roworx3d193/esp32-s3-piezo-tx-rx-board~zj](https://www.flux.ai/roworx3d193/esp32-s3-piezo-tx-rx-board~zj).* --- *Generated from [https://www.flux.ai/roworx3d193/esp32-s3-piezo-tx-rx-board~zj](https://www.flux.ai/roworx3d193/esp32-s3-piezo-tx-rx-board~zj)*