# Metropolitan Moccasin Robot Vacuum ## Description Ultra-Compact 1.8V Energy-Harvested Sensor Node with Apollo4, TMP117, and BQ25570 ## Project Details - **Owner:** flits101 - **Created:** 10/27/2025 - **Last Updated:** 10/28/2025 - **Visibility:** Public - **System Architecture:** ```mermaid graph TD EH[Energy Harvester Input] --> BQ[BQ25570 PMIC] BQ -->|1.8 V Rail| MCU[Ambiq Apollo4 Blue Lite MCU] BQ -->|1.8 V Rail| TMP[TMP117AIDRLR Sensor] MCU -->|I2C (SCL, SDA)| TMP BQ --> Storage[Energy Storage] ``` ## Key Components ### U1 — [AMA3B1KK-KCR-B0](https://www.flux.ai/adrian95/ama3b1kk-kcr-b0~573.md) - Manufacturer Name: Ambiq Micro, Inc. - Operating Voltage: 1.8V - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5731/Apollo3-Blue-SoC-Datasheet.pdf - Role: Main MCU - Manufacturer Part Number: AMA3B1KK-KCR-B0 **Pins:** - ADCVREF [pin A4] - DVDD [pin E7] - GPIO00 [pin F6] - GPIO01 [pin G5] - GPIO02 [pin G4] - GPIO03 [pin F4] - GPIO04 [pin C1] - GPIO05 [pin D2] - GPIO06 [pin E2] - GPIO07 [pin F2] - GPIO08 [pin D1] - GPIO09 [pin F1] - GPIO10 [pin E1] - GPIO11 [pin E4] - GPIO12 [pin B4] - GPIO13 [pin B3] - GPIO14 [pin A3] - GPIO15 [pin C3] - GPIO16 [pin A5] - GPIO17 [pin D4] - GPIO18 [pin E5] - GPIO19 [pin E6] - GPIO20 [pin C2] - GPIO21 [pin C4] - GPIO22 [pin A1] - GPIO23 [pin B1] - GPIO24 [pin B2] - GPIO25 [pin D3] - GPIO26 [pin A2] - GPIO27 [pin E3] - GPIO28 [pin F3] - GPIO29 [pin B5] - GPIO39 [pin H2] - GPIO40 [pin H1] - GPIO41 [pin H3] - GPIO44 [pin H4] - GPIO47 [pin G2] - GPIO48 [pin G3] - GPIO49 [pin G1] - RFIOM [pin H8] - RFIOP [pin H9] - RSTN [pin G6] - SIMOBUCK_SW [pin A9] - SIMOBUCK_SWSEL [pin A8] - VCC [pin H6] - VDCDCRF [pin F9] - VDDA [pin C5] - VDDB [pin B9] - VDDBH [pin C9] - VDDBH_SW [pin C8] - VDDC [pin A7] - VDDF [pin C6] - VDDH [pin F5] - VDDP [pin B8] - VDDS [pin D6] - VSS [pin F7] - VSSA [pin D5] - VSSB [pin C7] - VSSBA [pin G7] - VSSP [pin B7] - VSSS [pin H7] - VSSVCO [pin E9] - XI [pin B6] - XO [pin A6] - XO32MM [pin D9] - XO32MP [pin D8] ### U2 — [TMP117AIDRVR](https://www.flux.ai/adrian95/tmp117aidrvr~1du.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: TMP117AIDRVR - Role: Sensor - Role Details: I2C temperature sensor for ambient monitoring on 1.8 V rail - Datasheet URL: https://www.ti.com/lit/ds/symlink/tmp117.pdf **Pins:** - ADD0 [pin 4] - ALERT [pin 3] - GND_1 [pin 2] - GND_2 [pin 7] - SCL [pin 1] - SDA [pin 6] - V+ [pin 5] ### U3 — [BQ25570RGRR](https://www.flux.ai/vasy_skral/bq25570rgrr~h66.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq25570 - Manufacturer Name: Texas Instruments - Manufacturer Part Number: BQ25570RGRR - Role: Power Management - Part Type: Integrated Circuit - Role Details: Energy harvesting PMIC for 1.8 V rail **Pins:** - ~EN [pin 5] - EXP [pin 17] - EXP [pin 21] - EXP [pin 9] - LBOOST [pin 20] - LBUCK [pin 16] - OK_HYST [pin 10] - OK_PROG [pin 11] - VBAT [pin 18] - VBAT_OK [pin 13] - VBAT_OV [pin 7] - VIN_DC [pin 2] - VOC_SAMP [pin 3] - VOUT [pin 14] - VOUT_EN [pin 6] - VOUT_SET [pin 12] - VRDIV [pin 8] - VREF_SAMP [pin 4] - VSS [pin 1] - VSS1 [pin 15] - VSTOR [pin 19] ### U4 — [TPS79318-EP](https://www.flux.ai/kicad-part-library/tps79318-ep~318.md) - Manufacturer Part Number: TPS79318-EP - Datasheet URL: http://www.ti.com/lit/ds/symlink/tps79333-ep.pdf - Package or Case Code: SOT-23-5 - Manufacturer Name: Texas Instruments Inc. - Role Details: Post-regulation LDO for analog noise filtering on 1.8 V rail - Role: Power Filtering **Pins:** - BP [pin 4] - EN [pin 3] - GND [pin 2] - IN [pin 1] - OUT [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/flits101/metropolitan-moccasin-robot-vacuum~hn](https://www.flux.ai/flits101/metropolitan-moccasin-robot-vacuum~hn).* --- *Generated from [https://www.flux.ai/flits101/metropolitan-moccasin-robot-vacuum~hn](https://www.flux.ai/flits101/metropolitan-moccasin-robot-vacuum~hn)*