# Nosy Jade Time Machine ## Description WiFi/BLE Smart Humidity Sensor with ESP32 and SHT31-DIS-B, Powered by 5V Barrel Jack ## Project Details - **Owner:** oozliuoo - **Created:** 10/7/2025 - **Last Updated:** 10/7/2025 - **Visibility:** Public - **C2 Capacitor Type:** Ceramic - **C1 Package or Case Code:** C_0603_1608Metric - **Active Component Headroom Verified:** true - **Active Component Headroom Verification Notes:** TPS62133 AVIN=5V (within device input range); VOS=3.3V supplies ESP32-WROOM-32D and SHT31-DIS-B and is compatible; decoupling caps set C1=100nF 16V (AVIN input), C2=10µF 10V (VOS output); I2C pull-ups R1/R2=4.7kΩ 0.1W; U3:EN tied to AVIN to enable regulator on power-up; no other active-component compatibility issues found. - **Manufacturability_NextActions:** 1) Renumber duplicate designators, 2) Run DRC reviews and resolve, 3) Verify antenna keep-out and placement, 4) Confirm U3 footprint (EP/paste/via), 5) Recheck decoupling cap placement. - **Connectivity:** WiFi - **C2 Capacitance:** 0.00001F - **DRC_design_rule_check_missing_footprints_review:** Pending - run check and resolve any missing footprints before manufacturing. - **Duplicate_Designators_Issue:** Yes - R1, R2, C2, GND, and Net Portals are duplicated. Must renumber/rename for each components instance. - **R1 Resistance:** 4700Ω - **DRC_design_rule_check_overlapping_copper_review:** Pending - run check and resolve overlapping copper/DRC issues before manufacturing. - **DRC_airwires_review:** No unconnected nets or airwire issues found when running reviewTypes:["design_rule_check_airwires"] - **C1 Capacitance:** 1e-7F - **DRC_design_rule_check_airwires_review:** Pending - recheck for unconnected nets/airwires after edits. Previous review showed no issues. - **R1 Package or Case Code:** R_0603_1608Metric - **Lifecycle_Status_Check_Pending:** Yes - run parts_available and update Lifecycle Status for U1,U2,U3,C1,C2,R1,R2,J1 before ordering. - **Connectivity:** Bluetooth - **Software:** Arduino - **System Architecture:** graph LR Barrel_Jack["5V Barrel Jack"] --> Buck_Regulator["TPS62133 Buck Regulator"] Buck_Regulator --> ThreeV3_Rail["3.3V Rail"] ThreeV3_Rail --> ESP32["ESP32-WROOM-32D"] ThreeV3_Rail --> SHT31["SHT31-DIS-B2.5KS"] ESP32 --> I2C_Bus["I2C Bus"] SHT31 --> I2C_Bus I2C_Bus --> PullUps["4.7kΩ Pull-ups"] PullUps --> ThreeV3_Rail Barrel_Jack --> GND["GND"] Buck_Regulator --> GND ThreeV3_Rail --> GND ESP32 --> GND SHT31 --> GND - **Domain:** Consumer Electronics - **C1 Capacitor Type:** Ceramic - **Role Details:** WiFi/BLE Smart Humidity Sensor with ESP32 and SHT31-DIS-B, Powered by 5V Barrel Jack - **R2 Package or Case Code:** R_0603_1608Metric - **R2 Resistance:** 4700Ω - **Operating Voltage:** 5V - **Power Requirements:** Power Connectors - **C2 Package or Case Code:** C_0603_1608Metric ## Key Components ### J1 — [PJ-037A](https://www.flux.ai/vasy_skral/pj-037a~6cq.md) - Manufacturer Part Number: PJ-037A - Part Type: Connector - Role Details: 5 V DC barrel jack input connector - Lifecycle Status: Active - Datasheet URL: https://www.cuidevices.com/product/resource/pj-037a.pdf - Manufacturer Name: CUI Devices **Pins:** - Center pin [pin 1] - Terminal [pin 2] ### U1 — [ESP32-WROOM-32D](https://www.flux.ai/vasyl/esp32-wroom-32d~7py.md) - Lifecycle Status: Active - Role Details: Main MCU - Part Type: Microcontroller - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-WROOM-32D - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf - Manufacturer Name: Espressif Systems **Pins:** - 3.3V [pin 2] - AGND [pin 39] - CLK [pin 20] - CMD [pin 19] - EN [pin 3] - GND [pin 38] - GND [pin 15] - GND [pin 1] - 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 [pin 34] - SD0 [pin 21] - SD1 [pin 22] - SD2 [pin 17] - SD3 [pin 18] - TXD0 [pin 35] - VN [pin 5] - VP [pin 4] ### U2 — [SHT31-DIS-B2.5KS](https://www.flux.ai/vasy_skral/sht31-dis-b25ks~lhv.md) - Manufacturer Part Number: SHT31-DIS-B2.5KS - Part Type: Integrated Circuit - Role Details: Humidity and temperature sensor - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Sensirion%20PDFs/HT_DS_SHT3x_DIS.pdf - Manufacturer Name: Sensirion AG - Lifecycle Status: Active **Pins:** - ~RESET [pin 6] - ADDR [pin 2] - ALERT [pin 3] - R [pin 7] - SCL [pin 4] - SDA [pin 1] - VDD [pin 5] - VSS [pin 9] - VSS [pin 8] ### U3 — [TPS62133RGTT](https://www.flux.ai/lcsc/tps62133rgtt~j3oo.md) - Part Type: DC-DC Converters - Manufacturer Name: TI(德州仪器) - Package or Case Code: VQFN-16_L3.0-W3.0-P0.50-BL-EP1.7 - Role Details: 5V to 3.3V buck regulator - EN Pin Connected To: VIN - Manufacturer Part Number: TPS62133RGTT - JLCPCB Part Class: Extended Part - LCSC Part Number: C2070960 - EN Pin Net: VIN - Role: Power Conversion - Lifecycle Status: Active **Pins:** - AGND [pin 6] - AVIN [pin 10] - DEF [pin 8] - EN [pin 13] - EP [pin 17] - FB [pin 5] - FSW [pin 7] - PG [pin 4] - PGND [pin 16] - PGND [pin 15] - PVIN [pin 12] - PVIN [pin 11] - SS/TR [pin 9] - SW [pin 3] - SW [pin 2] - SW [pin 1] - VOS [pin 14] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/oozliuoo/nosy-jade-time-machine~o4j](https://www.flux.ai/oozliuoo/nosy-jade-time-machine~o4j).* --- *Generated from [https://www.flux.ai/oozliuoo/nosy-jade-time-machine~o4j](https://www.flux.ai/oozliuoo/nosy-jade-time-machine~o4j)*