# smart water meter ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** gabugraver41 - **Created:** 7/18/2025 - **Last Updated:** 9/11/2025 - **Visibility:** Public ## Key Components ### D8 — [1N4001 - 8363396](https://www.flux.ai/kicad-part-library/1n4001-8363396~sb.md) - Datasheet URL: http://www.vishay.com/docs/88503/1n4001.pdf - Package or Case Code: D_DO-41_SOD81_P10.16mm_Horizontal - Part Type: Diode THT - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: 1N4001 **Pins:** - A [pin 2] - K [pin 1] ### K1 — [Relay-12VDC-SL-C](https://www.flux.ai/deadzerok/relay-12vdc-sl-c~zh.md) - Manufacturer Part Number: SRD-12VDC-SL-C - Part Type: Relay - Manufacturer Name: Ningbo Songle Relay - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf **Pins:** - Coil-1 [pin COIL1] - Coil-2 [pin COIL2] - Com-3 [pin COM] - NC [pin NC] - NO [pin NO] ### LCD1 — [WC1602A](https://www.flux.ai/jecstronic/wc1602a~vi0.md) - Part Type: Display Device - Manufacturer Name: Wincom Tech - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: WC1602A - Datasheet URL: http://www.datasheet39.com/download.php?id=735838 **Pins:** - D0 [pin 7] - D1 [pin 8] - D2 [pin 9] - D3 [pin 10] - D4 [pin 11] - D5 [pin 12] - D6 [pin 13] - D7 [pin 14] - E [pin 6] - LED(-) [pin 16] - LED(+) [pin 15] - R/W [pin 5] - RS [pin 4] - VDD [pin 2] - VO [pin 3] - VSS [pin 1] ### Q1 — [2N2222A](https://www.flux.ai/lcsc/2n2222a~00rk.md) - LCSC Part Number: C118536 - Product Info Url: https://lcsc.com/product-detail/Transistors-NPN-PNP_2N2222_C118536.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809200018_ST-Semtech-2N2222A_C118536.pdf - Manufacturer Name: ST(先科) - Frequency: 250MHz - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 2N2222A - Compliance: RoHS - Part Type: Transistors/Thyristors/Bipolar (BJT) - Package or Case Code: TO-92-3_L4.9-W3.7-P1.27-L - Transistor Type: NPN **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### U1 — [ESP32-DEVKIT-V1](https://www.flux.ai/jharwinbarrozo/esp32-devkit-v1~7xd.md) - Manufacturer Part Number: ESP32-DEVKIT-V1 - Part Type: Module - Manufacturer Name: Espressif Systems - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf - Symbol Style: Parametric **Pins:** - 3V3 [pin 1] - D12 [pin 27] - D13 [pin 28] - D14 [pin 26] - D15 [pin 3] - D18 [pin 9] - D19 [pin 10] - D2 [pin 4] - D21 [pin 11] - D22 [pin 14] - D23 [pin 15] - D25 [pin 23] - D26 [pin 24] - D27 [pin 25] - D32 [pin 21] - D33 [pin 22] - D34 [pin 19] - D35 [pin 20] - D4 [pin 5] - D5 [pin 8] - EN [pin 16] - GND [pin 2] - GND_1 [pin 29] - RX0 [pin 12] - RX2 [pin 6] - TX0 [pin 13] - TX2 [pin 7] - VIN [pin 30] - VN [pin 18] - VP [pin 17] ### U2 — [SIM800L Module](https://www.flux.ai/adrian95/sim800l-module~ja6.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module - Manufacturer Part Number: SIM800L - Manufacturer Name: Simcom - Datasheet URL: https://components101.com/sites/default/files/component_datasheet/SIM800L-Datasheet.pdf **Pins:** - DTR [pin 11] - GND [pin 6] - MIC- [pin 9] - MIC+ [pin 10] - NET [pin 1] - RING [pin 12] - RST [pin 3] - RXD [pin 4] - SPK- [pin 7] - SPK+ [pin 8] - TXD [pin 5] - VCC [pin 2] ### U3 — [PCF8574P](https://www.flux.ai/lcsc/pcf8574p~rbf8.md) - Package or Case Code: DIP-16_L19.3-W6.4-P2.54-LS7.6-BL - Manufacturer Name: HGSEMI(华冠) - JLCPCB Part Class: Extended Part - LCSC Part Number: C398073 - Product Info Url: https://lcsc.com/product-detail/I-O-Expansion_HGSEMI-PCF8574P_C398073.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409291934_HGSEMI-PCF8574P_C398073.pdf - Manufacturer Part Number: PCF8574P - Part Type: I/O Expanders **Pins:** - #INT [pin 13] - A0 [pin 1] - A1 [pin 2] - A2 [pin 3] - P0 [pin 4] - P1 [pin 5] - P2 [pin 6] - P3 [pin 7] - P4 [pin 9] - P5 [pin 10] - P6 [pin 11] - P7 [pin 12] - SCL [pin 14] - SDA [pin 15] - VDD [pin 16] - VSS [pin 8] ### U4 — [M24M02 EEPROM 2MB's](https://www.flux.ai/georgemars/m24m02-eeprom-2mbs~wm.md) - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/b7/de/9b/f6/03/28/4e/8e/CD00290537.pdf/files/CD00290537.pdf/jcr:content/translations/en.CD00290537.pdf - Part Type: EEPROM - Manufacturer Part Number: M24M02-DRMN6TP - Manufacturer Name: STMicroelectronics NV **Pins:** - A0 [pin 1] - A1 [pin 2] - E2 [pin 3] - SCL [pin 6] - SDA [pin 5] - VCC [pin 8] - VSS [pin 4] - WC [pin 7] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/gabugraver41/smart-water-meter~vy](https://www.flux.ai/gabugraver41/smart-water-meter~vy).* --- *Generated from [https://www.flux.ai/gabugraver41/smart-water-meter~vy](https://www.flux.ai/gabugraver41/smart-water-meter~vy)*