# S3 Multi-Radio Handheld ## Description Standalone 4-layer ESP32-S3-WROOM-1U handheld multi-radio development and test platform with LiPo charging, display, NFC, storage, IR, and modular radio sockets. ## Project Details - **Owner:** ipadhalobuck - **Created:** 8/10/2026 - **Last Updated:** 8/10/2026 - **Visibility:** Public ## Key Components ### D1 — [LKS05D3-B](https://www.flux.ai/lcsc/lks05d3-b~trd.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: LKS05D3-B - Part Type: TVS - Package or Case Code: SOD-323_L1.8-W1.3-LS2.5-BI - LCSC Part Number: C2984829 - Manufacturer Name: LANKE(兰科) - Role: Protection - Role Details: 5V input ESD/transient clamp after fuse - Functional Group: Power Input **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SM340A](https://www.flux.ai/lcsc/sm340a~tzej.md) - Part Type: Schottky Barrier Diodes (SBD) - Manufacturer Part Number: SM340A - Package or Case Code: SMA_L4.4-W2.6-LS5.0-RD - JLCPCB Part Class: Extended Part - Manufacturer Name: LRC(乐山无线电) - LCSC Part Number: C383313 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_LRC-SM340A_C383313.pdf - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_Leshan-Radio-SM340A_C383313.html - Role: Flyback / Freewheeling - Role Details: 3A 40V Schottky catch diode for buck LX node - Functional Group: 3V3 Regulation **Pins:** - A [pin 2] - C [pin 1] ### F1 — [1206L110THYR](https://www.flux.ai/lcsc/1206l110thyr~n0dn.md) - Manufacturer Name: Littelfuse(美国力特) - Package or Case Code: F1206 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Littelfuse-1206L110THYR_C126818.pdf - LCSC Part Number: C126818 - Manufacturer Part Number: 1206L110THYR - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Surface-Mount-Fuses_Littelfuse_1206L110THYR_8V_C126818.html - Part Type: Resettable Fuses - Role: Protection - Role Details: 1.1A hold PPTC for 5V carrier input - Functional Group: Power Input **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [SM04B-SRSS-TB(LF)(SN)](https://www.flux.ai/lcsc/sm04b-srss-tblfsn~a667.md) - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - LCSC Part Number: C160404 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: SM04B-SRSS-TB(LF)(SN) - Part Type: Wire To Board / Wire To Wire Connector - Package or Case Code: CONN-SMD_4P-P1.00_SM04B-SRSS-TB-LF-SN - Manufacturer Name: JST - Product Info Url: https://lcsc.com/product-detail/Others_JST-Sales-America__JST-Sales-America-SM04B-SRSS-TB-LF-SN_C160404.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-SM04B-SRSS-TB-LF-SN_C160404.pdf - Role: Host Interface - Role Details: Verified exposed T-Embed Qwiic interface; no stacking geometry assumed - Functional Group: Host Interface **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/lcsc/b2b-ph-k-slfsn~yvsw.md) - Connector Positions: 2 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_JST-B2B-PH-K-S-LF-SN_C131337.pdf - Part Type: Wire To Board / Wire To Wire Connector - Connector Gender: Male - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST - Connector Rows: 1 - Package or Case Code: CONN-TH_B2B-PH-K-S - Connector Pitch: 2mm - Product Info Url: https://lcsc.com/product-detail/PH-Connectors_JST_B2B-PH-K-S-LF-SN_B2B-PH-K-S-LF-SN_C131337.html - LCSC Part Number: C131337 - Connector Type: Wire To Board Connector - Role: Power Input - Role Details: 5V 2A external carrier supply; do not backfeed host - Functional Group: Power Input **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [Pin Socket 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-02x04-254mm-vertical~vri.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Module Socket - Role Details: 2x4 2.54mm plug-in radio module socket - Functional Group: Radio Sockets **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J4 — [Pin Socket 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-02x04-254mm-vertical~vri.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Module Socket - Role Details: 2x4 2.54mm plug-in radio module socket - Functional Group: Radio Sockets **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J5 — [Pin Socket 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-02x04-254mm-vertical~vri.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Module Socket - Role Details: 2x4 2.54mm plug-in radio module socket - Functional Group: Radio Sockets **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### J7 — [Pin Socket 01x08 2.54mm Horizontal](https://www.flux.ai/adrian95/pin-socket-01x08-254mm-horizontal~da5.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Expansion Header - Role Details: 3V3, GND, I2C and expander GPIO only - Functional Group: Expansion **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### LED1 — [L1IZ-0850000000000](https://www.flux.ai/adrian95/l1iz-0850000000000~hto.md) - Part Type: LED - Package or Case Code: L1IZ0850000000000 - Manufacturer Name: Lumileds - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.lumileds.com/uploads/682/DS190-pdf - Manufacturer Part Number: L1IZ-0850000000000 - Role: IR Emitter - Role Details: 850nm, 1A pulse design point; firmware duty cycle and thermal limits mandatory - Functional Group: IR **Pins:** - ~ [pin 2] - ~ [pin 1] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Role: Low-Side Switch - Role Details: 3.3V gate drive; pulsed high-current IR emitter switching - Functional Group: IR **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — [AOZ1280CI](https://www.flux.ai/kicad-part-library/aoz1280ci~wcv.md) - Package or Case Code: SOT-23-6 - Manufacturer Part Number: AOZ1280CI - Datasheet URL: http://aosmd.com/res/data_sheets/AOZ1280CI.pdf - Role: Regulator - Role Details: 3.3V rail; 1.2A rating for approximately 0.8A peak load - Functional Group: 3V3 Regulation **Pins:** - BST [pin 1] - EN [pin 4] - FB [pin 3] - GND [pin 2] - LX [pin 6] - VIN [pin 5] ### U2 — [SC18IS606PWJ](https://www.flux.ai/adrian95/sc18is606pwj~mwe.md) - Manufacturer Name: NXP - Manufacturer Part Number: SC18IS606PWJ - Package or Case Code: SOP65P640X110-16N - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nxp.com/docs/en/data-sheet/SC18IS606.pdf - Role: Interface Bridge - Role Details: SPI bridge at 3.3V; avoids inventing inaccessible host SPI GPIO - Functional Group: Host Interface **Pins:** - ~INT [pin 3] - ~RESET [pin 4] - ~SS0~/GPIO0 [pin 9] - ~SS1~/GPIO1 [pin 16] - ~SS2~/GPIO2 [pin 8] - A0 [pin 7] - A1 [pin 6] - A2 [pin 5] - MISO [pin 14] - MOSI [pin 10] - SCL [pin 2] - SDA [pin 1] - SPICLK [pin 11] - VDD [pin 12] - VREFP [pin 15] - VSS [pin 13] ### U3 — [PCA9555PW,118](https://www.flux.ai/lcsc/pca9555pwc118~xjei.md) - Product Info Url: https://lcsc.com/product-detail/I-O-Expansion_NXP_PCA9555PW-118_PCA9555PW-118_C128392.html - Output Sink Current: 25mA - Manufacturer Name: NXP(恩智浦) - Operating Temperature: -40~+85℃ - LCSC Part Number: C128392 - Package or Case Code: TSSOP-24_L7.8-W4.4-P0.65-LS6.4-BL - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - Part Type: I/O Expanders - Frequency: 400kHz - Manufacturer Part Number: PCA9555PW,118 - JLCPCB Part Class: Extended Part - Output Source current: 10mA - Supply Voltage: 2.3~5.5V - Role: GPIO Expander - Role Details: 16-bit 3.3V I/O expansion; outputs default high impedance - Functional Group: Control Expansion **Pins:** - ~{INT} [pin 1] - A0 [pin 21] - A1 [pin 2] - A2 [pin 3] - IO0_0 [pin 4] - IO0_1 [pin 5] - IO0_2 [pin 6] - IO0_3 [pin 7] - IO0_4 [pin 8] - IO0_5 [pin 9] - IO0_6 [pin 10] - IO0_7 [pin 11] - IO1_0 [pin 13] - IO1_1 [pin 14] - IO1_2 [pin 15] - IO1_3 [pin 16] - IO1_4 [pin 17] - IO1_5 [pin 18] - IO1_6 [pin 19] - IO1_7 [pin 20] - SCL [pin 22] - SDA [pin 23] - VDD [pin 24] - VSS [pin 12] ### U4 — [TSOP38438](https://www.flux.ai/lcsc/tsop38438~sn8s.md) - Manufacturer Part Number: TSOP38438 - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Infrared-Receivers_VISHAY_TSOP38438_TSOP38438_C145271.html - Manufacturer Name: VISHAY(威世) - Package or Case Code: SENSOR-TG_TSOP38236 - Part Type: Infrared remote receiver - LCSC Part Number: C145271 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410121733_Vishay-Intertech-TSOP38438_C145271.pdf - Role: IR Receiver - Role Details: 38kHz receiver, active-low output - Functional Group: IR **Pins:** - GND [pin 2] - OUT [pin 1] - VS [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ipadhalobuck/s3-multi-radio-handheld~ql](https://www.flux.ai/ipadhalobuck/s3-multi-radio-handheld~ql).* --- *Generated from [https://www.flux.ai/ipadhalobuck/s3-multi-radio-handheld~ql](https://www.flux.ai/ipadhalobuck/s3-multi-radio-handheld~ql)*