# Involved Turquoise Scramble Suit ## Description Wi‑Fi/BLE Dual-Mode Portable Stereo Speaker with DSP and Smart Battery Management ## Project Details - **Owner:** adriangispert - **Created:** 10/16/2025 - **Last Updated:** 10/16/2025 - **Visibility:** Public - **TraceWidthRules:** High-current rails (amplifier, battery): 5A max, >=1.2mm width (outer, 1oz). Power inputs/output filter paths: 2A max, >=0.65mm width. Digital rails (3.3V, 2.7V, 1.2V): <500mA, >=0.3mm width. RF signal traces (2.4 GHz, 50Ω microstrip to antenna): width ~0.95mm (for 1.6mm FR4, 4L, surface microstrip), max current <100mA. All calculations based on IPC-2221, 20°C rise, 1oz copper. - **Missing Footprints:** U1 VDD - U6 VOUT, U1 GND - U5 VSS, U1 IO14 - U3 PLIMIT, U1 IO15 - U3 MUTE, U1 IO18 - U3 GAIN/SLV, U1 IO25 - U9 OE, U1 IO23 - U8 EN, U1 IO2 - U4 _PG, U1 IO4 - U4 _CE, U1 IO16 - U3 SDZ, U1 IO19 - U3 SYNC, U1 IO17 - U3 FAULTZ, U1 IO13 - U3 MODSEL, U2 SDATA_OUT0 - U3 RINP, U1 IO12 - U7 VBUS__EN_SNK, U1 IO0 - U7 RESET, U5 ~RST - U2 ~RESET, U6 VIN - C2 P1, U3 PVCC - C6 P1, U3 AVCC - C7 P1, U7 VREG__1V2 - C5 P1, U7 VREG__2V7 - C4 P1, U2 XTALIN/MCLK - C10 P1, U2 XTALOUT - C11 P1, J1 1 - U4 SRN, J2 VBUS4 - D1 Anode - **Stackup:** 4-layer: Top Signal, Inner Ground, Inner Power, Bottom Signal - **Primary Power Rails:** 3.3 V digital/RF, 1.2 V core analog, 2.7 V peripheral analog - **BoardDimensions:** 226.075×2295.5 - **Battery Configuration:** 3S Li-ion (11.1 V nominal, 12.6 V max) - **BoardWidth:** 226.075 - **BoardHeight:** 2295.5 - **System Architecture:** graph LR subgraph Power BATTERY[Battery Pack] CHARGER[USB-C Charger] PMIC[PMIC / Buck-Boost] BMS[BMS + Cell Balancing] FUEL[Fuel Gauge] end subgraph RF RF_MOD[Wi-Fi/BLE Module] ANT[Antenna] end subgraph Digital MCU[MCU / DSP] MEM[Memory] end subgraph Audio DAC[I²S Audio Interface] AMP_L[Class-D Amp Left] AMP_R[Class-D Amp Right] FILTER_L[LC Filter Left] FILTER_R[LC Filter Right] end subgraph Mechanical HOLES[Mounting Holes] ENC[Enclosure Interface] end BATTERY --> BMS --> FUEL BATTERY --> PMIC --> |Power Rails| MCU BATTERY --> PMIC --> |Power Rails| RF_MOD BATTERY --> PMIC --> |Power Rails| AMP_L BATTERY --> PMIC --> |Power Rails| AMP_R CHARGER --> PMIC MCU --> DAC --> AMP_L --> FILTER_L MCU --> DAC --> AMP_R --> FILTER_R MCU --> RF_MOD RF_MOD --> ANT HOLES --- ENC ENC --- MCU ENC --- RF_MOD ENC --- AMP_L ENC --- AMP_R ## Key Components ### D1 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf - Role: Protection - Manufacturer Name: Slkor(SLKORMICRO Elec.) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB input reverse polarity and OR-ing diode - Part Type: Diode - Manufacturer Part Number: SS14 **Pins:** - Anode [pin A] - Cathode [pin C] ### D2 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj50a~a9w.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: TVS diode for USB VBUS surge and ESD protection - Role: Protection - Part Type: Diode - Manufacturer Name: Bourns Inc. - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/SMBJ.pdf - Manufacturer Part Number: SMBJ5.0A **Pins:** - A [pin 2] - K [pin 1] ### F1 — [0603L050YR](https://www.flux.ai/jecstronic/0603l050yr~fdt.md) - Role Details: USB input overcurrent protection (PTC resettable fuse) - Datasheet URL: https://www.mouser.com/datasheet/2/240/media-3321531.pdf - Role: Protection - Manufacturer Name: Littelfuse Inc. - Part Type: Fuse - Manufacturer Part Number: 0603L050YR - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — [B4B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b4b-ph-k-slfsn~64f.md) - Role Details: Battery pack connector, JST-PH 4-pin - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - Manufacturer Part Number: B4B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Interface **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J2 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - Role Details: USB-C power input receptacle - Manufacturer Part Number: 2024100002 - Manufacturer Name: Molex - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Interface - Part Type: Connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### J3 — [AUDIO JACK 3.5mm](https://www.flux.ai/adrian95/audio-jack-35mm~yqh.md) - Role Details: Stereo audio I/O jack, 3.5 mm - Role: Interface - Part Type: Connector **Pins:** - ~ - ~ - GND - L - R ### J4 — [0901301106](https://www.flux.ai/adrian95/0901301106~t1x.md) - Role: Interface - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: Molex - Datasheet URL: https://tools.molex.com/pdm_docs/sd/901301106_sd.pdf - Role Details: Programming/debug header, 6-pin 2.54 mm pitch - Manufacturer Part Number: 0901301106 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### J5 — [U.FL-R-SMT-1](https://www.flux.ai/vasy_skral/ufl-r-smt-1~yly.md) - Role: Connector - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Hirose%20PDFs/UFL%20Series.pdf - Role Details: Antenna RF connector, 50 Ω coaxial U.FL SMT - Part Type: Connector - Manufacturer Name: Hirose Electric Co Ltd - Manufacturer Part Number: U.FL-R-SMT-1 **Pins:** - 1 [pin 1] - 2 [pin 2-1] - 3 [pin 2-2] ### NT1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 500Ω - Package: SMD_0603_1608Metric - Role Details: Star-ground tie for digital ground domain - Part Type: Resistor - Role: Net Tie **Pins:** - P1 [pin 1] - P2 [pin 2] ### NT2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Role: Net Tie - Part Type: Resistor - Resistance: 500Ω - Role Details: Star-ground tie for audio analog ground domain - Package: SMD_0603_1608Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### NT3 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: SMD_0603_1608Metric - Resistance: 500Ω - Role Details: Star-ground tie for power ground domain - Part Type: Resistor - Role: Net Tie **Pins:** - P1 [pin 1] - P2 [pin 2] ### NT4 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 500Ω - Package: SMD_0603_1608Metric - Role: Net Tie - Role Details: Star-ground tie for RF ground domain - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ESP32-WROOM-32](https://www.flux.ai/vasyl/esp32-wroom-32~siz.md) - Role Details: Wi-Fi 802.11b/g/n & BLE 5.x Module - Manufacturer Part Number: ESP32-WROOM-32 - Role: Modulation / Demodulation - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf - Part Type: RF module - Manufacturer Name: Espressif Systems **Pins:** - EN [pin 3] - GND [pin 38] - GND [pin 39] - GND [pin 1] - GND [pin 15] - 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/IO3 [pin 34] - SCK/CLK [pin 20] - SCS/CMD [pin 19] - SDI/SD1 [pin 22] - SDO/SD0 [pin 21] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - SHD/SD2 [pin 17] - SWP/SD3 [pin 18] - TXD0/IO1 [pin 35] - VDD [pin 2] ### U10 — [BQ76925](https://www.flux.ai/jecstronic/bq76925~vwb.md) - Role Details: Battery monitor and cell balancer for 3–6 cell Li-ion pack via I²C - Role: Monitoring - Manufacturer Part Number: BQ76925PW - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq76925.pdf - Part Type: Power Management **Pins:** - ALERT [pin 13] - BAT [pin 2] - SCL [pin 19] - SDA [pin 18] - SENSEN [pin 11] - SENSEP [pin 12] - V3P3 [pin 20] - VC0 [pin 9] - VC1 [pin 8] - VC2 [pin 7] - VC3 [pin 6] - VC4 [pin 5] - VC5 [pin 4] - VC6 [pin 3] - VCOUT [pin 15] - VCTL [pin 1] - VIOUT [pin 14] - VREF [pin 17] - VSS [pin 10] - VTB [pin 16] ### U2 — [ADAU1452](https://www.flux.ai/vasy_skral/adau1452~60j.md) - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1452_1451_1450.pdf - Manufacturer Name: Analog Devices - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ADAU1452 - Role Details: DSP for tone controls and audio processing **Pins:** - ~RESET [pin 24] - AGND [pin 6] - AUXADC0 [pin 8] - AUXADC1 [pin 9] - AUXADC2 [pin 10] - AUXADC3 [pin 11] - AUXADC4 [pin 12] - AUXADC5 [pin 13] - AVDD [pin 7] - BCLK_IN0 [pin 57] - BCLK_IN1 [pin 60] - BCLK_IN2 [pin 65] - BCLK_IN3 [pin 68] - BCLK_OUT0 [pin 40] - BCLK_OUT1 [pin 43] - BCLK_OUT2 [pin 48] - BCLK_OUT3 [pin 51] - CLKOUT [pin 23] - DGND [pin 72] - DGND [pin 55] - DGND [pin 54] - DGND [pin 19] - DGND [pin 1] - DGND [pin 37] - DGND [pin 17] - DGND [pin 25] - DGND [pin 36] - DVDD [pin 53] - DVDD [pin 20] - DVDD [pin 71] - DVDD [pin 35] - EP [pin 73] - IOVDD [pin 38] - IOVDD [pin 18] - IOVDD [pin 2] - IOVDD [pin 56] - LRCLK_IN0/MP10 [pin 58] - LRCLK_IN1/MP11 [pin 61] - LRCLK_IN2/MP12 [pin 66] - LRCLK_IN3/MP13 [pin 69] - LRCLK_OUT0/MP4 [pin 39] - LRCLK_OUT1/MP5 [pin 42] - LRCLK_OUT2/MP8 [pin 47] - LRCLK_OUT3/MP9 [pin 50] - MISO/SDA [pin 30] - MOSI_M/MP1 [pin 27] - MOSI/ADDR1 [pin 32] - MP6 [pin 45] - MP7 [pin 46] - PGND [pin 14] - PLLFILT [pin 16] - PVDD [pin 15] - SCL_M/SCLK_M/MP2 [pin 28] - SCLK/SCL [pin 31] - SDA_M/MISO_M/MP3 [pin 29] - SDATA_IN0 [pin 59] - SDATA_IN1 [pin 62] - SDATA_IN2 [pin 67] - SDATA_IN3 [pin 70] - SDATA_OUT0 [pin 41] - SDATA_OUT1 [pin 44] - SDATA_OUT2 [pin 49] - SDATA_OUT3 [pin 52] - SELFBOOT [pin 34] - SPDIFIN [pin 4] - SPDIFOUT [pin 5] - SS_M/MP0 [pin 26] - SS/ADDR0 [pin 33] - THD_M [pin 63] - THD_P [pin 64] - VDRIVE [pin 3] - XTALIN/MCLK [pin 21] - XTALOUT [pin 22] ### U3 — [TPA3116D2](https://www.flux.ai/jecstronic/tpa3116d2~2va.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/tpa3116d2.pdf - Manufacturer Part Number: TPA3116D2 - Role: Amplification - Manufacturer Name: Texas Instruments - Role Details: Stereo Class-D amplifier (2×10–25 W) - Part Type: Integrated Circuit **Pins:** - AM0 [pin 15] - AM1 [pin 14] - AM2 [pin 13] - AVCC [pin 17] - BSNL [pin 20] - BSNR [pin 26] - BSPL [pin 24] - BSPR [pin 30] - FAULTZ [pin 3] - GAIN/SLV [pin 8] - GND [pin 9] - GND [pin 22] - GND [pin 28] - GND [pin 25] - GVDD [pin 7] - LINN [pin 11] - LINP [pin 10] - MODSEL [pin 1] - MUTE [pin 12] - OUTNL [pin 21] - OUTNR [pin 27] - OUTPL [pin 23] - OUTPR [pin 29] - PLIMIT [pin 6] - PVCC [pin 19] - PVCC [pin 32] - PVCC [pin 18] - PVCC [pin 31] - RINN [pin 5] - RINP [pin 4] - SDZ [pin 2] - SYNC [pin 16] ### U4 — [BQ25750](https://www.flux.ai/tima/bq25750~r4.md) - Purchase Url: https://www.ti.com/product/BQ25750?bm-verify=AAQAAAAJ_____zxRvj-aoQBOSpiNoJewyZT3vSMQ4fs-qKCB0fTXHEIQQLjhvqvGUy9QVwHofE6JQ0IzygYjaKwpXQSyI1dW3sGWOi4OWDiSUk3H4j7xewdQc_eW3dOuRvuuFRFchyKfbEKlLpWjDv1XS4hDhYxyEmIFl5R6XGIv9nRw_kENUdiZbExDCJ2RcUcgMsVqDz3kWQgs-Y7G5E25SFfLEiTd2LBSCGj6yRE-Hw30EqPnruQ_X_0-aIwG6QNWsE3qLWgcH658Zb9mxpWgSm8Ntya-QzwnSBWIWKwtD8KeMgIyuy5l#all - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq25750.pdf?ts=1722747231201&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FBQ25750%253Fbm-verify%253DAAQAAAAJ_____xavQICyghxurJ8h0MdmBt-6yCgzPu3CqYoVVtuqwDXce0eDfnOvkMLPkddc3wzYm1Q1D4_lEXQi_59PzlCKGXEyu25rTOaGwfObZ4oHttDUK5uM6lzDQnJgUXRpKd9vkXn7r32wjhqrGXq2I1oN9hja0B8q_D6egvZ53aiZP3_o87AE-9itXVcK-8eWK5eA1cJUHiZfy1YUVIc3fhEdpjp7l02Utm3k18wV927sWDsngU5ldBKqrlVeoNrwCXAUeY1s29V61lsrupHxWsiS6UVgMHIueq3Uc3K8HL_bBvfhqu8 - Connectivity: I2C - Role Details: Battery charger/PMIC for multi-cell Li-ion pack - Current: 0.4A - 20A - Operating Voltage: 4.2V-70V - Role: Power Management **Pins:** - _CE [pin 7] - _INT [pin 3] - _PG [pin 6] - ACDRV [pin 31] - ACN [pin 29] - ACOV [pin 35] - ACP [pin 30] - ACUV [pin 34] - BAT DRV [pin 15] - BAT SRC [pin 16] - BTST1 [pin 26] - BTST2 [pin 20] - DRV_SUP [pin 23] - FB [pin 12] - FBG [pin 11] - FSW_SYNC [pin 36] - HIDRV1 [pin 27] - HIDRV2 [pin 19] - ICHG [pin 9] - ILIM_HIZ [pin 10] - LODRV1 [pin 25] - LODRV2 [pin 21] - PGND [pin 17] - PGND [pin 22] - REGN [pin 24] - SCL [pin 1] - SDA [pin 2] - SRN [pin 13] - SRP [pin 14] - STAT1 [pin 4] - STAT2 [pin 5] - SW1 [pin 28] - SW2 [pin 18] - SYS [pin 32] - THEM_GND - TS [pin 8] - VAC [pin 33] ### U5 — [MCP130-300FI/TO](https://www.flux.ai/vasy_skral/mcp130-300fito~kut.md) - Role: Protection - Datasheet URL: http://www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en011325 - Manufacturer Name: Microchip Technology - Manufacturer Part Number: MCP130-300FI/TO - Part Type: Integrated Circuit - Role Details: Reset supervisor for U1 EN and U2 ~RESET **Pins:** - ~RST [pin 2] - VDD [pin 3] - VSS [pin 1] ### U6 — [TPS63020DSJT](https://www.flux.ai/lcsc/tps63020dsjt~718d.md) - Package or Case Code: VSON-14_L4.0-W3.0-P0.50-BL-EP_TI_DSJ - Part Type: DC-DC Converters - Role Details: Buck-boost converter for 3.3V rail from multi-cell battery - Role: Power Management - JLCPCB Part Class: Extended Part - LCSC Part Number: C544952 - Manufacturer Part Number: TPS63020DSJT - Manufacturer Name: TI(德州仪器) **Pins:** - EN [pin 12] - FB [pin 3] - GND [pin 2] - L1 [pin 8] - L1 [pin 9] - L2 [pin 6] - L2 [pin 7] - PG [pin 14] - PGND [pin 15] - PS/SYNC [pin 13] - VIN [pin 10] - VIN [pin 11] - VINA [pin 1] - VOUT [pin 4] - VOUT [pin 5] ### U7 — [STUSB4500LBJR](https://www.flux.ai/adrian95/stusb4500lbjr~pa5.md) - Part Type: Integrated Circuit - Package or Case Code: BGA25C40P5X5_259X259X54 - Manufacturer Name: STMicroelectronics - Role: Power Management - Role Details: USB-C/PD controller for USB-C power negotiation and charging - Datasheet URL: https://www.mouser.com/datasheet/2/389/stusb4500l-1666828.pdf - Manufacturer Part Number: STUSB4500LBJR - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A_B__SIDE [pin C2] - ADDR0 [pin D3] - ADDR1 [pin D2] - ALERT [pin B2] - ATTACH [pin E2] - CC1 [pin B5] - CC1DB [pin B4] - CC2 [pin C5] - CC2DB [pin C4] - DISCH [pin E4] - GND [pin E3] - GPIO [pin D1] - NC_1 [pin B3] - NC_2 [pin C3] - RESET [pin D4] - RP_1A5 [pin E1] - RP_3A [pin A2] - SCL [pin D5] - SDA [pin E5] - VBUS__EN_SNK [pin C1] - VBUS_VS__DISCH [pin A1] - VDD [pin A5] - VREG__1V2 [pin A3] - VREG__2V7 [pin A4] - VSYS [pin B1] ### U8 — [PCA9306DP-118](https://www.flux.ai/jecstronic/pca9306dp-118~yzw.md) - Datasheet URL: https://www.nxp.com/docs/en/data-sheet/PCA9306.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Logic-level Shifting - Manufacturer Part Number: PCA9306DP,118 - Role Details: I²C level translator between 1.8 V and 3.3 V - Part Type: Integrated Circuit - Manufacturer Name: NXP USA Inc. **Pins:** - EN [pin 8] - GND [pin 1] - SCL1 [pin 3] - SCL2 [pin 6] - SDA1 [pin 4] - SDA2 [pin 5] - VREF1 [pin 2] - VREF2 [pin 7] ### U9 — [TXB0104RUTR](https://www.flux.ai/jecstronic/txb0104rutr~q6q.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Role Details: Quad bidirectional level translator for SPI and UART between 1.8 V and 3.3 V - Role: Logic-level Shifting - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftxb0104 - Manufacturer Part Number: TXB0104RUTR - Part Type: Integrated Circuit **Pins:** - A1 [pin 2] - A2 [pin 3] - A3 [pin 4] - A4 [pin 5] - B1 [pin 10] - B2 [pin 9] - B3 [pin 8] - B4 [pin 7] - GND [pin 6] - OE [pin 12] - VCCA [pin 1] - VCCB [pin 11] ### Y1 — [12MHz Crystal Oscillator](https://www.flux.ai/collinsemasi/12mhz-crystal-oscillator~wc.md) - Manufacturer Name: YXC - Manufacturer Part Number: X322512MSB4SI - Role Details: Provide 12 MHz MCLK clock for U2 - Role: Oscillator - Part Type: Resonator - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_YXC-X322512MSB4SI_C9002.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/adriangispert/involved-turquoise-scramble-suit~ib](https://www.flux.ai/adriangispert/involved-turquoise-scramble-suit~ib).* --- *Generated from [https://www.flux.ai/adriangispert/involved-turquoise-scramble-suit~ib](https://www.flux.ai/adriangispert/involved-turquoise-scramble-suit~ib)*