# Pet Health Tracking Collar ## Description Compact LiPo-powered pet collar health tracker using nRF52832 BLE, ECG, optical PPG, 6-axis motion sensing, and Quectel BG95 cellular/GNSS connectivity. ## Project Details - **Owner:** thelightgg - **Created:** 7/24/2026 - **Last Updated:** 7/24/2026 - **Visibility:** Public - **Connectivity:** Cellular - **Power Requirements:** Battery - **Domain:** Consumer Electronics - **Implementation Details:** ECG, PPG, IMU, LTE-M/NB-IoT, GNSS ## Key Components ### AE1 — [2450AT42A0100001E](https://www.flux.ai/adrian95/2450at42a0100001e~uph.md) - Manufacturer Part Number: 2450AT42A0100001E - Manufacturer Name: Johanson Technology Inc. - Part Type: Antenna - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Johanson 2.4 GHz chip antenna with pi tuning network - Role: BLE Antenna - Datasheet URL: https://www.johansontechnology.com/datasheets/2450AT42A100/2450AT42A100.pdf **Pins:** - 1 [pin 1] ### D1 — [USBLC6-2SC6](https://www.flux.ai/vasy_skral/usblc6-2sc6~g1b.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: ESD Protection - Manufacturer Name: STMicroelectronics - Symbol Style: parametric-v1 - Manufacturer Part Number: USBLC6-2SC6 - Role Details: Low-capacitance two-line USB interface ESD array - LCSC Part Number: C7519 - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/06/1d/48/9c/6c/20/4a/b2/CD00050750.pdf/files/CD00050750.pdf/jcr:content/translations/en.CD00050750.pdf - Part Type: Protection **Pins:** - GND [pin 2] - I/O1 [pin 6] - I/O1 [pin 1] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### J1 — [USB4215-03-A](https://www.flux.ai/adrian95/usb4215-03-a~kg3.md) - Package or Case Code: GCT_USB4215-03-A_REVA - License: https://creativecommons.org/licenses/by/4.0/ - Symbol Style: parametric-v1 - Role: Power Input - Role Details: USB-C sink-only receptacle with independent CC pull-downs - Manufacturer Part Number: USB4215-03-A - Manufacturer Name: GCT - Datasheet URL: https://gct.co/files/specs/usb4215-spec.pdf - Part Type: USB C **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND_A [pin A1_B12] - GND_B [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin SH1] - SHIELD [pin SH4] - SHIELD [pin SH2] - SHIELD [pin SH3] - VBUS_A [pin A4_B9] - VBUS_B [pin B4_A9] ### J4 — [2452796-1](https://www.flux.ai/adrian95/2452796-1.md) - Manufacturer Name: TE Connectivity - Role Details: 4FF nano-SIM interface for BG95 - Manufacturer Part Number: 2452796-1 - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocFormat=pdf&DocLang=English&DocNm=2452796&DocType=Customer+Drawing&PartCntxt=2452796-1 - Symbol Style: parametric-v1 - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: SIM Connector **Pins:** - CLK [pin C3] - DETECTION_SWITCH [pin SW1] - GND [pin C5] - GROUND_1 [pin G1] - GROUND_2 [pin G2] - GROUND_3 [pin G3] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J5 — [RECE.20279.001E.01](https://www.flux.ai/jecstronic/recep20279p001ep01~tt9.md) - Manufacturer Part Number: RECE.20279.001E.01 - Manufacturer Name: Taoglas Limited - Role Details: 50 ohm LTE main antenna connector - Datasheet URL: https://cdn.taoglas.com/datasheets/RECE.20279.001E.01.pdf - Part Type: Connector - Role: RF Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 2] - GND [pin 3] - SIGNAL [pin 1] ### J6 — [RECE.20279.001E.01](https://www.flux.ai/jecstronic/recep20279p001ep01~tt9.md) - Manufacturer Part Number: RECE.20279.001E.01 - Manufacturer Name: Taoglas Limited - Datasheet URL: https://cdn.taoglas.com/datasheets/RECE.20279.001E.01.pdf - Part Type: Connector - Role Details: 50 ohm GNSS antenna connector - Role: RF Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 2] - GND [pin 3] - SIGNAL [pin 1] ### U1 — [BQ24074RGTT](https://www.flux.ai/lcsc/bq24074rgtt~fpyl.md) - Role Details: 5 V USB input; conservative 500 mA default input, 500 mA charge target; protected battery directly supports 2.0 A BG95 bursts - Manufacturer Name: Texas Instruments - Part Type: Battery Management ICs - Manufacturer Part Number: BQ24074RGTT - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24074.pdf - Package or Case Code: VQFN-16_L3.0-W3.0-P0.50-TL-EP1.7 - Operating Temperature: -40 to 85°C - Symbol Style: parametric-v1 - Package: VQFN-16 RGT (3 mm × 3 mm) with exposed thermal pad - LCSC Part Number: C2861252 - Implementation Details: Standalone single-cell Li-Ion/Li-Polymer linear charger and power-path management IC; 4.2 V battery regulation, 4.4 V OUT regulation, 10.5 V OVP, 1.5 A programmable fast charge/input current limit. - Operating Voltage: IN operating range 4.35–10.2 V for BQ24074; IN withstand/recommended range up to 26 V, abs max 28 V - Role: Battery Charger - JLCPCB Part Class: Extended Part - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~{CE} [pin 4] - ~{CHG} [pin 9] - ~{PGOOD} [pin 7] - BAT [pin 2] - BAT [pin 3] - EN1 [pin 6] - EN2 [pin 5] - EP [pin 17] - ILIM [pin 12] - IN [pin 13] - ISET [pin 16] - ITERM [pin 15] - OUT [pin 11] - OUT [pin 10] - TMR [pin 14] - TS [pin 1] - VSS [pin 8] ### U2 — [TPS79318-EP](https://www.flux.ai/kicad-part-library/tps79318-ep~318.md) - Role: Linear Regulator - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: TPS79318-EP - Role Details: 200 mA low-noise 1.8 V LDO sized above 35 mA active / 100 mA design minimum - Package or Case Code: SOT-23-5 - Datasheet URL: http://www.ti.com/lit/ds/symlink/tps79333-ep.pdf **Pins:** - BP [pin 4] - EN [pin 3] - GND [pin 2] - IN [pin 1] - OUT [pin 5] ### U3 — [TPS22995RZGR](https://www.flux.ai/adrian95/tps22995rzgr.md) - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Role: Load Switch - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps22995.pdf - Manufacturer Part Number: TPS22995RZGR - Role Details: Low-RON 3.8 A-class VBAT switch for 2.0 A modem bursts with 25% path margin **Pins:** - CT [pin 6] - GND [pin 4] - ON [pin 3] - VBIAS [pin 1] - VIN [pin 2] - VOUT [pin 5] ### U5 — [MAX30003CTI+](https://www.flux.ai/lcsc/max30003ctiplus~rpdt.md) - Symbol Style: parametric-v1 - JLCPCB Part Class: Extended Part - Package or Case Code: QFN-28_L5.0-W5.0-P0.50-TL-EP3.3 - Role: ECG AFE - Part Type: Integrated Circuit - LCSC Part Number: C1519515 - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX30003.pdf - Role Details: Single-lead ECG, SPI, lead-off and R-to-R detection - Manufacturer Name: ADI(亚德诺)/MAXIM(美信) - Manufacturer Part Number: MAX30003CTI+ **Pins:** - AGND [pin 28] - AGND [pin 3] - AGND [pin 8] - AVDD [pin 22] - CAPN [pin 10] - CAPP [pin 9] - CPLL [pin 11] - CSB [pin 15] - DGND [pin 12] - DVDD [pin 13] - ECGN [pin 7] - ECGP [pin 6] - EP [pin 29] - FCLK [pin 14] - I.C [pin 24] - I.C [pin 5] - I.C [pin 26] - I.C [pin 1] - I.C [pin 2] - I.C [pin 4] - INT2B [pin 20] - INTB [pin 21] - OVDD [pin 19] - SCLK [pin 16] - SDI [pin 17] - SDO [pin 18] - VBG [pin 27] - VCM [pin 25] - VREF [pin 23] ### U7 — [LSM6DSV16XTR](https://www.flux.ai/jecstronic/lsm6dsv16xtr~99t.md) - Manufacturer Part Number: LSM6DSV16XTR - Part Type: Sensor - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/group3/47/03/b2/44/47/32/4b/76/DM00741844/files/DM00741844.pdf/jcr:content/translations/en.DM00741844.pdf - Manufacturer Name: STMicroelectronics NV - Role: Motion Sensor - Role Details: Shared I2C IMU with two interrupt outputs and fixed address strap **Pins:** - CS [pin 12] - GND [pin 7] - GND [pin 6] - INT1 [pin 4] - INT2 [pin 9] - OCS_AUX [pin 10] - SCL [pin 13] - SCx/AH2/QVAR2 [pin 3] - SDA [pin 14] - SDO_AUX [pin 11] - SDO/SA0 [pin 1] - SDx/AH1/QVAR1 [pin 2] - VDD [pin 8] - VDD_IO [pin 5] ### U8 — [BG95M3LA-64-SGNS](https://www.flux.ai/lcsc/bg95m3la-64-sgns~1znm.md) - Part Type: 2G/3G/4G/5G Modules - Manufacturer Name: Quectel(移远) - Manufacturer Part Number: BG95M3LA-64-SGNS - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7133/Quectel_BG95_Series_LPWA_Specification_V2.2.pdf - Symbol Style: parametric-v1 - LCSC Part Number: C2960993 - Role: Cellular GNSS Module - Package or Case Code: LPWA-MODULE-SMD_L23.6-W19.9-P1.10-BG95-M1 - JLCPCB Part Class: Extended Part - Role Details: Protected switched VBAT; 1.8 V UART/control; 2.0 A burst design target **Pins:** - ADC0 [pin 24] - ADC1 [pin 2] - ANT_GNSS [pin 49] - ANT_MAIN [pin 60] - ANT_WIFI [pin 56] - AP_READY [pin 19] - DBG_RXD [pin 22] - DBG_TXD [pin 23] - GND [pin 73] - GND [pin 68] - GND [pin 71] - GND [pin 101] - GND [pin 67] - GND [pin 50] - GND [pin 100] - GND [pin 91] - GND [pin 79] - GND [pin 70] - GND [pin 102] - GND [pin 58] - GND [pin 80] - GND [pin 82] - GND [pin 48] - GND [pin 69] - GND [pin 31] - GND [pin 62] - GND [pin 74] - GND [pin 3] - GND [pin 89] - GND [pin 90] - GND [pin 54] - GND [pin 55] - GND [pin 81] - GND [pin 61] - GND [pin 59] - GND [pin 72] - GNSS_LAN_EN [pin 51] - GNSS_RXD [pin 28] - GNSS_TXD [pin 27] - GPIO1 [pin 25] - GPIO2 [pin 26] - GPIO3 [pin 64] - GPIO4 [pin 65] - GPIO5 [pin 66] - GPIO6 [pin 85] - GPIO7 [pin 86] - GPIO8 [pin 87] - GPIO9 [pin 88] - GRFC1 [pin 83] - GRFC2 [pin 84] - I2C_SCL [pin 40] - I2C_SDA [pin 41] - MAIN_CTS [pin 36] - MAIN_DCD [pin 38] - MAIN_DTR [pin 30] - MAIN_RI [pin 39] - MAIN_RTS [pin 37] - MAIN_RXD [pin 34] - MAIN_TXD [pin 35] - NET_STATUS [pin 21] - PCM_CLK [pin 4] - PCM_DIN [pin 6] - PCM_DOUT [pin 7] - PCM_SYNC [pin 5] - PON_TRIG [pin 96] - PSM_IND [pin 1] - PWRKEY [pin 15] - RESERVED [pin 63] - RESERVED [pin 13] - RESERVED [pin 11] - RESERVED [pin 78] - RESERVED [pin 98] - RESERVED [pin 92] - RESERVED [pin 93] - RESERVED [pin 14] - RESERVED [pin 12] - RESERVED [pin 97] - RESERVED [pin 16] - RESERVED [pin 77] - RESERVED [pin 76] - RESERVED [pin 57] - RESERVED [pin 94] - RESERVED [pin 99] - RESERVED [pin 95] - RESET_N [pin 17] - STATUS [pin 20] - USB_BOOT [pin 75] - USB_DM [pin 10] - USB_DP [pin 9] - USB_VBUS [pin 8] - USIM_CLK [pin 46] - USIM_DATA [pin 45] - USIM_DET [pin 42] - USIM_GND [pin 47] - USIM_RST [pin 44] - USIM_VDD [pin 43] - VBAT_BB [pin 33] - VBAT_BB [pin 32] - VBAT_RF [pin 52] - VBAT_RF [pin 53] - VDD_EXT [pin 29] - W_DISABLE [pin 18] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/thelightgg/pet-health-tracking-collar-cmud6~uc](https://www.flux.ai/thelightgg/pet-health-tracking-collar-cmud6~uc).* --- *Generated from [https://www.flux.ai/thelightgg/pet-health-tracking-collar-cmud6~uc](https://www.flux.ai/thelightgg/pet-health-tracking-collar-cmud6~uc)*