# Biskuit AI: Project Showcase xuSd ## Description Biskuit is a compact, ESP32-S3-powered wearable device designed for real-time transcription and effortless note-taking. Featuring a 3-microphone array and wireless communication to sync to to the cloud instantly. ## Project Details - **Owner:** drvelmuruganb - **Created:** 2/18/2025 - **Last Updated:** 2/18/2025 - **Visibility:** Public - **Battery Option:** https://www.lipobattery.us/iec62133-certified-lipo-battery-lp453038-500mah-3-7v-1-85wh-with-pcm-wires-molex-51021-0200/?_gl=1*1lilgtd*_up*MQ..*_ga*NTc1Nzg4MTczLjE3MjM4MjAyOTM.*_ga_08ZLJYQED8*MTcyMzgyMDI4OS4xLjEuMTcyMzgyMDMzNi4wLjAuMTQ2MjQwNTIxMg.. - **Software compatibility:** IOS, WINDOWS, ANDROID - **Operating Temperature:** -20 to 50 - **Description:** Biskuit is a compact, ESP32-S3-powered wearable device designed for real-time transcription and effortless note-taking. Featuring a 3-microphone array and wireless communication to sync to to the cloud instantly. - **Microphone TI Ref Design:** https://drive.google.com/file/d/195FT2PQD5LBLPHQvMQ77EjG55xSXPbak/view?usp=sharing - **Human Interface:** Button, Display - **License:** https://ohwr.org/project/cernohl/wikis/home - **Connectivity:** WiFi, Bluetooth - **Reliability Target (MTBF):** 10000hours - **Domain:** Consumer Electronics - **Compliance:** RoHS, REACH - **IP Rating:** IP68 - **Power Requirements:** Battery - **Device Input:** Microphone Array - **Construction:** Aluminum body - **Operating Voltage:** 3.3 - **Battery Lifetime:** 150hrs - **Forks:** 18 - **Copies:** 1 ## Key Components ### ANT1 — PCB Antenna e37d - Part Type: Antenna - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - FeedPoint [pin 1] - GND [pin 2] ### BLUE — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric.md) - DEBUG INDICATOR: BIAS - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### D1 — [PMEG3020EGWJ](https://www.flux.ai/lcsc/pmeg3020egwj.md) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410010202_Nexperia-PMEG3020EGWJ_C552875.pdf - Manufacturer Part Number: PMEG3020EGWJ - Manufacturer Name: Nexperia(安世) - Product Info Url: https://lcsc.com/product-detail/presales_Nexperia-PMEG3020EGWJ_C552875.html - Part Type: Schottky Barrier Diodes (SBD) - Package or Case Code: SOD-123_L2.8-W1.8-LS3.7-RD - LCSC Part Number: C552875 - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - C [pin 1] ### D2 — [1N4448WX-TP](https://www.flux.ai/lcsc/1n4448wx-tp.md) - Manufacturer Part Number: 1N4448WX-TP - Manufacturer Name: MCC(美微科) - Datasheet URL: https://lcsc.com/product-detail/Switching-Diode_MCC-Micro-Commercial-Components-MCC-1N4448WX-TP_C712353.html - LCSC Part Number: C712353 - JLCPCB Part Class: Extended Part - Part Type: Switching Diode - Package or Case Code: SOD-323_L1.8-W1.3-LS2.5-RD - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_MCC-Micro-Commercial-Components-MCC-1N4448WX-TP_C712353.html **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [MCP73832T-2ACI/MC](https://www.flux.ai/collinsemasi/mcp73832t-2acimc.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MCP73832T-2ACI/MC - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/MCP73831-Family-Data-Sheet-DS20001984H.pdf - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology - Symbol Style: Parametric **Pins:** - EP [pin 9] - NC [pin 7] - PROG [pin 8] - STAT [pin 5] - VBAT_1 [pin 3] - VBAT_2 [pin 4] - VDD_1 [pin 1] - VDD_2 [pin 2] - VSS [pin 6] ### J1 — TYPE-C-31-M-12 - Manufacturer Name: Korean Hroparts Elec - Symbol Style: Parametric - Manufacturer Part Number: TYPE-C-31-M-12 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://en.krhro.com/npublic/opdfjs/web/viewer.html?file=https%3A%2F%2Fomo-oss-file.thefastfile.com%2Fportal-saas%2Fnew2023011311465142457%2Fcms%2Ffile%2F95f41c83-14fa-41cb-9f86-8d6a717317e5.pdf - Part Type: Connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin S3] - SHIELD [pin S1] - SHIELD [pin S4] - SHIELD [pin S2] - VBUS [pin B4A9] - VBUS [pin A4B9] ### J2 — [SM02B-SRSS-TB(LF)(SN)](https://www.flux.ai/collinsemasi/sm02b-srss-tblfsn.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eSH.pdf - Manufacturer Part Number: SM02B-SRSS-TB - Part Type: Battery Conn - Manufacturer Name: JST Sales America Inc. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### LED1 — [LTST-C19HE1WT](https://www.flux.ai/vasy_skral/ltst-c19he1wt.md) - Manufacturer Part Number: LTST-C19HE1WT - Datasheet URL: https://optoelectronics.liteon.com/upload/download/DS22-2008-0044/LTST-C19HE1WT.pdf - Manufacturer Name: Lite-On Inc. - Part Type: LED **Pins:** - A [pin 4] - B [pin 3] - G [pin 2] - R [pin 1] ### LED2 — [LED 0805 (2012 Metric)](https://www.flux.ai/vasyl/led-0805-2012-metric.md) - Part Type: LED - DEBUG INDICATOR: PWR **Pins:** - A [pin 2] - K [pin 1] ### MK1 — [ICS-40618](https://www.flux.ai/collinsemasi/ics-40618.md) - Part Type: Microphone - Output Type: Analog - Supply Current: 190 µA - Direction: Omnidirectional - Product Brief: https://invensense.tdk.com/wp-content/uploads/2016/02/PB-000024-ICS-40618-Product-Brief-v1-0.pdf?ref_disty=digikey - Moisture Sensitivity Level (MSL): 1 (Unlimited) - Frequency Range: 50 Hz ~ 20 kHz - Manufacturer Part Number: ICS-40618 - Voltage Range: 1.52 V ~ 3.63 V - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2016/02/DS-000044-ICS-40618-v1.0.pdf?ref_disty=digikey - Sensitivity: -38db ±1dB - RoHS Status: ROHS3 Compliant - Manufacturer Name: TDK InvenSense - HTSUS: 8518.10.8030 - S/N Ration: 67dB - REACH Status: REACH Unaffected - Port Location: Bottom - ECCN: EAR99 **Pins:** - GND [pin 3] - GND__1 [pin 4] - OUTPUT- [pin 2] - OUTPUT+ [pin 1] - VDD [pin 5] ### MK2 — [ICS-40618](https://www.flux.ai/collinsemasi/ics-40618.md) - Supply Current: 190 µA - Product Brief: https://invensense.tdk.com/wp-content/uploads/2016/02/PB-000024-ICS-40618-Product-Brief-v1-0.pdf?ref_disty=digikey - Moisture Sensitivity Level (MSL): 1 (Unlimited) - Direction: Omnidirectional - Part Type: Microphone - Output Type: Analog - S/N Ration: 67dB - REACH Status: REACH Unaffected - Port Location: Bottom - Manufacturer Name: TDK InvenSense - HTSUS: 8518.10.8030 - ECCN: EAR99 - Manufacturer Part Number: ICS-40618 - Frequency Range: 50 Hz ~ 20 kHz - RoHS Status: ROHS3 Compliant - Sensitivity: -38db ±1dB - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2016/02/DS-000044-ICS-40618-v1.0.pdf?ref_disty=digikey - Voltage Range: 1.52 V ~ 3.63 V **Pins:** - GND [pin 3] - GND__1 [pin 4] - OUTPUT- [pin 2] - OUTPUT+ [pin 1] - VDD [pin 5] ### MK3 — [ICS-40618](https://www.flux.ai/collinsemasi/ics-40618.md) - Supply Current: 190 µA - Product Brief: https://invensense.tdk.com/wp-content/uploads/2016/02/PB-000024-ICS-40618-Product-Brief-v1-0.pdf?ref_disty=digikey - Moisture Sensitivity Level (MSL): 1 (Unlimited) - Direction: Omnidirectional - Part Type: Microphone - Output Type: Analog - S/N Ration: 67dB - REACH Status: REACH Unaffected - Port Location: Bottom - HTSUS: 8518.10.8030 - Manufacturer Name: TDK InvenSense - ECCN: EAR99 - Manufacturer Part Number: ICS-40618 - Frequency Range: 50 Hz ~ 20 kHz - RoHS Status: ROHS3 Compliant - Datasheet URL: https://invensense.tdk.com/wp-content/uploads/2016/02/DS-000044-ICS-40618-v1.0.pdf?ref_disty=digikey - Voltage Range: 1.52 V ~ 3.63 V - Sensitivity: -38db ±1dB **Pins:** - GND [pin 3] - GND__1 [pin 4] - OUTPUT- [pin 2] - OUTPUT+ [pin 1] - VDD [pin 5] ### Q1 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a.md) - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Leakage Current: 1e-13A - Beta / hFe: 100 - Manufacturer Name: onsemi - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Manufacturer Part Number: MMBT2222A **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q2 — [RU1C001ZPTL](https://www.flux.ai/lcsc/ru1c001zptl.md) - Manufacturer Name: ROHM(罗姆) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: RU1C001ZPTL - LCSC Part Number: C510010 - Package or Case Code: SOT-323-3_L2.0-W1.3-P1.30-LS2.1-BR **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q3 — [SSM3K15ACTC,L3F](https://www.flux.ai/vasy_skral/ssm3k15actccl3f.md) - Datasheet URL: https://toshiba.semicon-storage.com/info/SSM3K15ACTC_datasheet_en_20171130.pdf?did=52901&prodName=SSM3K15ACTC - Manufacturer Part Number: SSM3K15ACTC,L3F - Manufacturer Name: Toshiba Semiconductor and Storage - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW3 — [PTS810SJM250SMTRLFS](https://www.flux.ai/collinsemasi/pts810sjm250smtrlfs.md) - Maximum Voltage: 12VDC - Bounce Time: ≤ 10 ms - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf - Manufacturer Part Number: PTS815 SJG 250 SMTR LFS - Maximum Current DC: 50mA - Dielectric Strength: 250 VA C (1mn) - Manufacturer Name: C & K **Pins:** - 3 [pin 3] - 1 [pin 1] - 4 [pin 4] - 2 [pin 2] ### U1 — [TLV320ADC5140IRTWR](https://www.flux.ai/collinsemasi/tlv320adc5140irtwr.md) - Symbol Style: Parametric - Operating Voltage: 1.7V ~ 3.6V, 1.65V ~ 3.6V - Fs: 768kHz - Operating Temperature: -40°C ~ 125°C (TA) - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/tlv320adc5140.pdf - Part Type: Integrated Circuit - Data Interface: I2C, SPI - Manufacturer Part Number: TLV320ADC5140IRTWR - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ADDR0_SCLK [pin 16] - ADDR1_MISO [pin 15] - AREG [pin 2] - AVDD [pin 1] - AVSS [pin 4] - BCLK [pin 22] - DREG [pin 24] - FSYNC [pin 23] - GPIO1 [pin 20] - IN1M_GPO1 [pin 7] - IN1P_GPI1 [pin 6] - IN2M_GPO2 [pin 9] - IN2P_GPI2 [pin 8] - IN3M_GPO3 [pin 11] - IN3P_GPI3 [pin 10] - IN4M_GPO4 [pin 13] - IN4P_GPI4 [pin 12] - IOVDD [pin 19] - MICBIAS [pin 5] - SCL_MOSI [pin 17] - SDA_SSZ [pin 18] - SDOUT [pin 21] - SHDNZ [pin 14] - VREF [pin 3] - VSS [pin 25] ### U2 — [AP7331-33WG-7](https://www.flux.ai/collinsemasi/ap7331-33wg-7.md) - JLCPCB Part Class: Extended Part - Symbol Style: Parametric - Package or Case Code: SOT-25_L3.0-W1.6-P0.95-LS2.8-BL - Product Info Url: https://lcsc.com/product-detail/Low-Dropout-Regulators-LDO_DIODES_AP7331-33WG-7_AP7331-33WG-7_C151004.html - Part Type: Linear Voltage Regulators (LDO) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Diodes-Incorporated-AP7331-33WG-7_C151004.pdf - Manufacturer Name: DIODES(美台) - Manufacturer Part Number: AP7331-33WG-7 - LCSC Part Number: C151004 **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] ### U4 — [ESP32-S3](https://www.flux.ai/collinsemasi/esp32-s3.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-s3_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Part Type: RF Transceiver IC - Hardware Design Guidlines: https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32s3/esp-hardware-design-guidelines-en-master-esp32s3.pdf - Manufacturer Part Number: ESP32-S3 - Symbol Style: Parametric **Pins:** - CHIP_PU [pin 4] - GND [pin 57] - GPIO0 [pin 5] - GPIO1 [pin 6] - GPIO10 [pin 15] - GPIO11 [pin 16] - GPIO12 [pin 17] - GPIO13 [pin 18] - GPIO14 [pin 19] - GPIO17 [pin 23] - GPIO18 [pin 24] - GPIO19/USB_D- [pin 25] - GPIO2 [pin 7] - GPIO20/USB_D+ [pin 26] - GPIO21 [pin 27] - GPIO3 [pin 8] - GPIO33 [pin 38] - GPIO34 [pin 39] - GPIO35 [pin 40] - GPIO36 [pin 41] - GPIO37 [pin 42] - GPIO38 [pin 43] - GPIO4 [pin 9] - GPIO45 [pin 51] - GPIO46 [pin 52] - GPIO5 [pin 10] - GPIO6 [pin 11] - GPIO7 [pin 12] - GPIO8 [pin 13] - GPIO9 [pin 14] - LNA_IN [pin 1] - MTCK [pin 44] - MTDI [pin 47] - MTDO [pin 45] - MTMS [pin 48] - SPICLK [pin 33] - SPICLK_N [pin 36] - SPICLK_P [pin 37] - SPICS0 [pin 32] - SPICS1 [pin 28] - SPID [pin 35] - SPIHD [pin 30] - SPIQ [pin 34] - SPIWP [pin 31] - U0RXD [pin 50] - U0TXD [pin 49] - VDD_SPI [pin 29] - VDD3P3 [pin 2] - VDD3P3 [pin 3] - VDD3P3_CPU [pin 46] - VDD3P3_RTC [pin 20] - VDDA [pin 56] - VDDA [pin 55] - XTAL_32K_N [pin 22] - XTAL_32K_P [pin 21] - XTAL_N [pin 53] - XTAL_P [pin 54] ### U5 — [AT25SF161B-UUB-T](https://www.flux.ai/collinsemasi/at25sf161b-uub-t.md) - Manufacturer Name: Renesas Electronics Corporation - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AT25SF161B-UUB-T - Part Type: Integrated Circuit - Datasheet URL: https://www.renesas.com/us/en/document/dst/at25sf161b-datasheet **Pins:** - ~CS [pin A3] - ~HOLD [pin C1] - ~WP [pin E3] - GND [pin B2] - SCK [pin E1] - SI(I/O0) [pin D2] - SO(I/O1) [pin C3] - VCC [pin A1] ### Y1 — [CX2016DB40000D0FLJCC](https://www.flux.ai/adrian95/cx2016db40000d0fljcc.md) - Manufacturer Name: KYOCERA AVX - Manufacturer Part Number: CX2016DB40000D0FLJCC - Frequency: 40MHz ±10 ppm. - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1139/CX2016DB_Series_Spec.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Oscillator **Pins:** - GND_1 [pin 2] - GND_2 [pin 4] - HOT_1 [pin 1] - HOT_2 [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/drvelmuruganb/biskuit-ai-project-showcase-xusd](https://www.flux.ai/drvelmuruganb/biskuit-ai-project-showcase-xusd).* --- *Generated from [https://www.flux.ai/drvelmuruganb/biskuit-ai-project-showcase-xusd](https://www.flux.ai/drvelmuruganb/biskuit-ai-project-showcase-xusd)*