# Particular Blue KITT ## Description Integration of 2.9" Raw E-Paper Display with Raspberry Pi using FPC and Dedicated PMIC Driver ## Project Details - **Owner:** informal-sam - **Created:** 11/6/2025 - **Last Updated:** 11/13/2025 - **Visibility:** Public - **Layout Note:** Maintain 40–60 mm spacing between the two microphones for optimal beamforming. - **System Architecture:** graph LR Pi[Pi Zero 2 W 40-pin header] MIC_L[Left PDM MEMS Microphone] MIC_R[Right PDM MEMS Microphone] EInk[2.9" E-Ink Display] NFC[NFC Tag IC] EEPROM[HAT ID EEPROM] Batt[AA Battery Pack] Boost[5V Boost Converter] SW_R[Reed Switch] SW_T1[Tactile Switch 1] SW_T2[Tactile Switch 2] Ant[13.56 MHz PCB Loop Antenna] Pi -- MOSI --> EInk Pi -- MISO --> EInk Pi -- SCK --> EInk Pi -- CS --> EInk Pi -- DC --> EInk Pi -- RST --> EInk Pi -- BUSY --> EInk Pi -- PDM_CLK --> MIC_L Pi -- PDM_CLK --> MIC_R Pi -- PDM_DAT --> MIC_L Pi -- PDM_DAT --> MIC_R Pi -- SDA --> NFC Pi -- SCL --> NFC Pi -- SDA --> EEPROM Pi -- SCL --> EEPROM Batt --> Boost --> Pi Pi -- GND --> GND Pi -- GPIO_R --> SW_R Pi -- GPIO_T1 --> SW_T1 Pi -- GPIO_T2 --> SW_T2 NFC -. Antenna .-> Ant - **ERC_Results:** [{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":7,"description":"Unconnected power pin (U2, pin 7: VDD_A)"}},{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":8,"description":"Unconnected power pin (U2, pin 8: VDD)"}},{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":9,"description":"Unconnected power pin (U2, pin 9: VDD_RF)"}},{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":10,"description":"Unconnected power pin (U2, pin 10: VDD_TX)"}},{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":11,"description":"Unconnected power pin (U2, pin 11: VDD_AM)"}},{"type":"erc_missing_power_pin_connection","data":{"designator":"U2","pin":14,"description":"Unconnected power pin (U2, pin 14: VDD_DR)"}}] - **FPC Connector Orientation:** Pin 1 (Gx) nearest PCB edge, orientation per panel datasheet - **Trace Keepout - VGH, VGL, VCOM:** Maintain 5 mm clearance around VGH, VGL, and VCOM netsmm - **Microphone Spacing:** 40–60mm ## Key Components ### BAT1 — [BC2AAPC](https://www.flux.ai/vasy_skral/bc2aapc~866.md) - Part Type: Connector - Manufacturer Name: MPD (Memory Protection Devices) - Package or Case Code: BAT_BC2AAPC - Manufacturer Part Number: BC2AAPC - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Source - Role Details: 2×AA battery holder - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1086/BC2AAPC.pdf **Pins:** - - [pin 2] - + [pin 1] ### D1 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - Role Details: Reverse polarity protection diode - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Part Type: Diode - Package or Case Code: DIOM5336X265N - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf - Role: Protection **Pins:** - Anode [pin A] - Cathode [pin C] ### J1 — [Adafruit 2222 Raspberry Pi Header](https://www.flux.ai/kofron/adafruit-2222-raspberry-pi-header~49.md) - Role: Connector - Package or Case Code: CONN_2222_ADA - Role Details: Pi Zero 2 W 40-pin header **Pins:** - 3v3 [pin 17] - 3v3 [pin 1] - 5V PWR [pin 2] - 5V PWR [pin 4] - GPIO 0 (HAT EEPROM i2c Data) [pin 27] - GPIO 1 (HAT EEPROM i2c Clock) [pin 28] - GPIO 10 (SPI0 MOSI) [pin 19] - GPIO 11 (SPI0 SCLK) [pin 23] - GPIO 12 (PWM0) [pin 32] - GPIO 13 (PWM1) [pin 33] - GPIO 14 (UART Transmit) [pin 8] - GPIO 15 (UART Receive) [pin 10] - GPIO 16 [pin 36] - GPIO 17 [pin 11] - GPIO 18 (PCM Clock) [pin 12] - GPIO 19 (PCM Frame Sync) [pin 35] - GPIO 20 (PCM Data-In) [pin 38] - GPIO 21 (PCM Data-Out) [pin 40] - GPIO 22 [pin 15] - GPIO 23 [pin 16] - GPIO 24 [pin 18] - GPIO 25 [pin 22] - GPIO 26 [pin 37] - GPIO 27 [pin 13] - GPIO 5 [pin 29] - GPIO 6 [pin 31] - GPIO 7 (SPI Chip Select 1) [pin 26] - GPIO 8 (SPI Chip Select 0) [pin 24] - GPIO 9 (SPI0 MISO) [pin 21] - GPIO2 (I2C1 SDA) [pin 3] - GPIO3 (I2C1 SCL) [pin 5] - GPIO4 (GPCLK0) [pin 7] - Ground [pin 25] - GROUND [pin 30] - GROUND [pin 6] - GROUND [pin 20] - GROUND [pin 39] - GROUND [pin 9] - GROUND [pin 34] - GROUND [pin 14] ### J2 — [1-1734592-2](https://www.flux.ai/kerwal1984/1-1734592-2-mht3w~5a.md) - Datasheet URL: https://www.te.com/en/product-1-1734592-2.datasheet.pdf - Manufacturer Part Number: 1-1734592-2 - Drawing URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F1734592%7FC1%7Fpdf%7FEnglish%7FENG_CD_1734592_C1.pdf%7F1-1734592-2 - Role: Connector - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Role Details: BOM placeholder for raw 2.9" e-paper FPC connector **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] - SHIELD [pin S1] - SHIELD__1 [pin S2] ### J2 — [1-1734592-2](https://www.flux.ai/kerwal1984/1-1734592-2-mht3w~5a.md) - Role Details: Raw 2.9" e-paper panel FPC connector placeholder (pin names: Gx, Sx, VCOM, VGL, VGH, VDD, RES, CLK, DIN, CS, AUX) - Part Type: Connector - Role: Connector - Datasheet URL: https://www.te.com/en/product-1-1734592-2.datasheet.pdf - Manufacturer Part Number: 1-1734592-2 - Drawing URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F1734592%7FC1%7Fpdf%7FEnglish%7FENG_CD_1734592_C1.pdf%7F1-1734592-2 - Manufacturer Name: TE Connectivity AMP Connectors **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] - SHIELD [pin S1] - SHIELD__1 [pin S2] ### MK1 — [CMM-4030DT-26354-TR](https://www.flux.ai/collinsemasi/cmm-4030dt-26354-tr~6t.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cuidevices.com/product/resource/cmm-4030dt-26354-tr.pdf - Role: Sensor - Manufacturer Part Number: CMM-4030DT-26354-TR - Role Details: PDM MEMS microphone for beamforming - Part Type: Microphone - Manufacturer Name: CUI Devices **Pins:** - CLOCK [pin 2] - DATA [pin 1] - GROUND [pin 5] - GROUND [pin 8] - GROUND [pin 7] - GROUND [pin 6] - SELECT [pin 3] - VDD [pin 4] ### MK2 — [CMM-4030DT-26354-TR](https://www.flux.ai/collinsemasi/cmm-4030dt-26354-tr~6t.md) - Part Type: Microphone - Manufacturer Name: CUI Devices - Role: Sensor - Role Details: PDM MEMS microphone for beamforming - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cuidevices.com/product/resource/cmm-4030dt-26354-tr.pdf - Manufacturer Part Number: CMM-4030DT-26354-TR **Pins:** - CLOCK [pin 2] - DATA [pin 1] - GROUND [pin 5] - GROUND [pin 8] - GROUND [pin 7] - GROUND [pin 6] - SELECT [pin 3] - VDD [pin 4] ### REED1 — [custom reed](https://www.flux.ai/projazzka/custom-reed~p7.md) - Datasheet URL: https://www.littelfuse.com/media?resourcetype=datasheets&itemid=a42b08e0-1fdf-4815-8489-0dbae6f9e547&filename=littelfuse-reed-switches-mdsm-4-datasheet - Role: Switch - Manufacturer Name: Littelfuse Inc. - Manufacturer Part Number: MDSM-4R-12-18 - Package or Case Code: MDSM-4R-12-18 - Role Details: Reed switch for user input - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Switch **Pins:** - ~ [pin 2] - ~ [pin 1] ### SW1 — [B3FS-1050P](https://www.flux.ai/jharwinbarrozo/b3fs-1050p~hog.md) - Package or Case Code: SW_SPST_Omron_B3FS-105xP - Part Type: Switch - Manufacturer Part Number: B3FS-1050P - Manufacturer Name: OMRON - Role Details: Tactile pushbutton switches - Role: Switch - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809271215_Omron-Electronics-B3FS-1050P_C231326.pdf **Pins:** - P1 - P2 ### SW2 — [B3FS-1050P](https://www.flux.ai/jharwinbarrozo/b3fs-1050p~hog.md) - Role Details: Tactile pushbutton switches - Package or Case Code: SW_SPST_Omron_B3FS-105xP - Part Type: Switch - Manufacturer Name: OMRON - Manufacturer Part Number: B3FS-1050P - Role: Switch - Datasheet URL: https://datasheet.lcsc.com/lcsc/1809271215_Omron-Electronics-B3FS-1050P_C231326.pdf **Pins:** - P1 - P2 ### U1 — [TPS61099DRV](https://www.flux.ai/kicad-part-library/tps61099drv~cxs.md) - Role: Power Conversion - Manufacturer Part Number: TPS61099DRV - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm - Role Details: Boost converter for 2×AA to 5V rail - Datasheet URL: https://www.ti.com/lit/gpn/TPS61099 **Pins:** - EN [pin 4] - FB [pin 3] - GND [pin 1] - GND [pin 7] - SW [pin 5] - VI [pin 6] - VOUT [pin 2] ### U2 — [ST25R3918-AQWT](https://www.flux.ai/adrian95/st25r3918-aqwt~dmz.md) - Package or Case Code: QFN50P500X500X100-33N - Manufacturer Part Number: ST25R3918-AQWT - Datasheet URL: https://www.st.com/resource/en/datasheet/st25r3918.pdf - Role Details: I2C NFC tag controller for 13.56 MHz PCB antenna - Role: RF Semiconductor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: STMicroelectronics - Part Type: Integrated Circuit **Pins:** - AGDC [pin 24] - BSS [pin 29] - EP [pin 33] - EXT_LM [pin 17] - GND_A [pin 26] - GND_D [pin 6] - GND_DR_1 [pin 12] - GND_DR_2 [pin 16] - I2C_EN [pin 20] - IRQ [pin 27] - MCU_CLK [pin 28] - MISO/SDA [pin 32] - MOSI [pin 31] - NC_1 [pin 2] - NC_2 [pin 18] - NC_3 [pin 19] - NC_4 [pin 25] - RFI1 [pin 22] - RFI2 [pin 23] - RFO1 [pin 13] - RFO2 [pin 15] - SCLK/SCL [pin 30] - VDD [pin 8] - VDD_A [pin 7] - VDD_AM [pin 11] - VDD_D [pin 3] - VDD_DR [pin 14] - VDD_IO [pin 1] - VDD_RF [pin 9] - VDD_TX [pin 10] - VSS [pin 21] - XTI [pin 5] - XTO [pin 4] ### U3 — [AT24C02D-MAHM-T](https://www.flux.ai/adrian95/at24c02d-mahm-t~nw0.md) - Manufacturer Name: Microchip Technology - Manufacturer Part Number: AT24C02D-MAHM-T - Package or Case Code: SON50P300X200X60-9N - Role Details: HAT ID EEPROM per Raspberry Pi HAT spec - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/AT24C01D-AT24C02D-I2C-Compatible-Two-Wire-Serial-EEPROM-1Kbit-2Kbit-20006100A.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A0 [pin 1] - A1 [pin 2] - A2 [pin 3] - EP [pin 9] - GND [pin 4] - SCL [pin 6] - SDA [pin 5] - VCC [pin 8] - WP [pin 7] ### U4 — [CMM-4030DT-26354-TR](https://www.flux.ai/collinsemasi/cmm-4030dt-26354-tr~6t.md) - Datasheet URL: https://www.cuidevices.com/product/resource/cmm-4030dt-26354-tr.pdf - Role: Sensor - Role Details: Left PDM MEMS microphone - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: CMM-4030DT-26354-TR - Part Type: Microphone - Manufacturer Name: CUI Devices **Pins:** - CLOCK [pin 2] - DATA [pin 1] - GROUND [pin 5] - GROUND [pin 8] - GROUND [pin 7] - GROUND [pin 6] - SELECT [pin 3] - VDD [pin 4] ### U5 — [CMM-4030DT-26354-TR](https://www.flux.ai/collinsemasi/cmm-4030dt-26354-tr~6t.md) - Role: Sensor - Manufacturer Name: CUI Devices - Part Type: Microphone - Manufacturer Part Number: CMM-4030DT-26354-TR - Role Details: Right PDM MEMS microphone - Datasheet URL: https://www.cuidevices.com/product/resource/cmm-4030dt-26354-tr.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CLOCK [pin 2] - DATA [pin 1] - GROUND [pin 5] - GROUND [pin 8] - GROUND [pin 7] - GROUND [pin 6] - SELECT [pin 3] - VDD [pin 4] ### U6 — [TPS65185RSLR](https://www.flux.ai/lcsc/tps65185rslr~czn.md) - Manufacturer Part Number: TPS65185RSLR - LCSC Part Number: C139292 - Role: Power Management - Package or Case Code: VQFN-48_L6.0-W6.0-P0.40-TL-EP - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010303_Texas-Instruments-TPS65185RSLR_C139292.pdf - Role Details: BOM placeholder for e-paper driver/PMIC - Part Type: Power Management Specialized - PMIC - Product Info Url: https://lcsc.com/product-detail/PMIC-AC-DC-Converters_TI_TPS65185RSLR_TPS65185RSLR_C139292.html **Pins:** - ~{INT} [pin 2] - AGND1 [pin 8] - AGND2 [pin 48] - DGND [pin 6] - EP [pin 49] - INT_LDO [pin 7] - NC [pin 39] - NC [pin 38] - NC [pin 11] - NC [pin 20] - NC [pin 13] - PBKG [pin 22] - PGND1 [pin 41] - PGND2 [pin 32] - PWR_GOOD [pin 23] - PWRUP [pin 21] - SCL [pin 17] - SDA [pin 18] - TS [pin 47] - V3P3 [pin 46] - VB [pin 42] - VB_SW [pin 40] - VCOM [pin 15] - VCOM_CTRL [pin 12] - VCOM_DIS [pin 14] - VCOM_PWR [pin 16] - VDDH_D [pin 34] - VDDH_DIS [pin 35] - VDDH_DRV [pin 36] - VDDH_FB [pin 33] - VDDH_IN [pin 37] - VEE_D [pin 30] - VEE_DIS [pin 29] - VEE_DRV [pin 28] - VEE_FB [pin 31] - VEE_IN [pin 27] - VIN [pin 10] - VIN_P [pin 24] - VIN3P3 [pin 45] - VN [pin 26] - VN_SW [pin 25] - VNEG [pin 3] - VNEG_DIS [pin 9] - VNEG_IN [pin 4] - VPOS [pin 44] - VPOS_DIS [pin 19] - VPOS_IN [pin 43] - VREF [pin 1] - WAKEUP [pin 5] ### U6 — [TPS65185RSLR](https://www.flux.ai/lcsc/tps65185rslr~czn.md) - Package or Case Code: VQFN-48_L6.0-W6.0-P0.40-TL-EP - LCSC Part Number: C139292 - Manufacturer Part Number: TPS65185RSLR - Product Info Url: https://lcsc.com/product-detail/PMIC-AC-DC-Converters_TI_TPS65185RSLR_TPS65185RSLR_C139292.html - Part Type: Power Management Specialized - PMIC - Role Details: Generate VGH, VGL, VCOM for 2.9" e-paper panel - Role: Power Management - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010303_Texas-Instruments-TPS65185RSLR_C139292.pdf - Manufacturer Name: TI(德州仪器) - JLCPCB Part Class: Extended Part **Pins:** - ~{INT} [pin 2] - AGND1 [pin 8] - AGND2 [pin 48] - DGND [pin 6] - EP [pin 49] - INT_LDO [pin 7] - NC [pin 39] - NC [pin 38] - NC [pin 11] - NC [pin 20] - NC [pin 13] - PBKG [pin 22] - PGND1 [pin 41] - PGND2 [pin 32] - PWR_GOOD [pin 23] - PWRUP [pin 21] - SCL [pin 17] - SDA [pin 18] - TS [pin 47] - V3P3 [pin 46] - VB [pin 42] - VB_SW [pin 40] - VCOM [pin 15] - VCOM_CTRL [pin 12] - VCOM_DIS [pin 14] - VCOM_PWR [pin 16] - VDDH_D [pin 34] - VDDH_DIS [pin 35] - VDDH_DRV [pin 36] - VDDH_FB [pin 33] - VDDH_IN [pin 37] - VEE_D [pin 30] - VEE_DIS [pin 29] - VEE_DRV [pin 28] - VEE_FB [pin 31] - VEE_IN [pin 27] - VIN [pin 10] - VIN_P [pin 24] - VIN3P3 [pin 45] - VN [pin 26] - VN_SW [pin 25] - VNEG [pin 3] - VNEG_DIS [pin 9] - VNEG_IN [pin 4] - VPOS [pin 44] - VPOS_DIS [pin 19] - VPOS_IN [pin 43] - VREF [pin 1] - WAKEUP [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/informal-sam/particular-blue-kitt~bw](https://www.flux.ai/informal-sam/particular-blue-kitt~bw).* --- *Generated from [https://www.flux.ai/informal-sam/particular-blue-kitt~bw](https://www.flux.ai/informal-sam/particular-blue-kitt~bw)*