Water Level Monitor and Control
About the Water Level Monitor and Control PCB
Water Level Monitor and Control is an open source ESP32 PCB design by jsitech4, published on GitHub. It is a 2-layer board measuring 88.6 × 88.7 mm, with 51 components from 41 distinct parts.
Its main chip is the ESP32-WROOM, from the ESP32 family. Other key parts include the LM2596S-3.3V, LM2596S-12V and LM2596S-5V. By type, the board carries 17 diodes, 17 resistors, 8 capacitors, 4 ICs, 2 connectors and 1 relay.
It belongs with the displays & leds and sensors designs in this gallery.
From the project
This project is a NodeMCU based Water Level Monitoring and Automatic Pump Control System designed to monitor the water level inside a tank using an ultrasonic sensor, display the water level using an LED bar graph through the PCA9555D I2C I/O expander, and automatically control a
This project is a NodeMCU based Water Level Monitoring and Automatic Pump Control System designed to monitor the water level inside a tank using an ultrasonic sensor, display the water level using an LED bar graph through the PCA9555D I2C I/O expander, and automatically control a water pump based on the tank level.
The system continuously measures the distance between the ultrasonic sensor and the water surface, converts the reading into a percentage value, and updates the LED graph accordingly.
Main components on the Water Level Monitor and Control
Water Level Monitor and Control bill of materials (BOM)
51 components, 41 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM2596S-3.3V ESP8266 NODEMCU | nodemcu | U1 |
| 1 | LM2596S-12V HC-SR04 | XCVR_HC-SR04 | U2 |
| 1 | ESP32-WROOM LM2596S-5V | TO-263-5_TabPin3 | U3 |
| 1 | LM2596S-5V PCA9555D | SOIC-24W_7.5x15.4mm_P1.27mm | U4 |
| 1 | 12VAC_IN | ScrewTerminal_1x02_P3.5mm_Horizontal_Black | J1 |
| 1 | PUMP | ScrewTerminal_1x02_P3.5mm_Horizontal_Black | J2 |
| 1 | 10A/12V 10A RELAY | Relay_SPDT_Finder_36.11 | K1 |
| 1 | PC817XFP PC817 | DIP-4_W7.62mm_LongPads | OC1 |
| 2 | 1N4007 | D_A-405_P10.16mm_Horizontal | D1, D17 |
| 1 | 1N5824 1N4007 | D_A-405_P10.16mm_Horizontal | D2 |
| 1 | 1N5824 LED_0% | LED_D5.0mm | D3 |
| 1 | LED_0% | LED_D5.0mm | D4 |
| 2 | SM4001 1N4007 | D_A-405_P10.16mm_Horizontal | D5, D6 |
| 1 | SM4001 LED_25% | LED_D5.0mm | D7 |
| 1 | LED_50% | LED_D5.0mm | D8 |
| 2 | LED_75% | LED_D5.0mm | D9, D15 |
| 1 | SM4001 LED_100% | LED_D5.0mm | D10 |
| 1 | SM4001 LED_0% | LED_D5.0mm | D11 |
| 1 | LED_25% | LED_D5.0mm | D12 |
| 1 | 1N5819 LED_50% | LED_D5.0mm | D13 |
Show 21 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1N5819 1N5824 | D_2010_5025Metric | D14 |
| 1 | LED_100% | LED_D5.0mm | D16 |
| 1 | 33UH 33uH | L_12x12mm_H4.5mm | L1 |
| 2 | 680UF/35V 100nF | C_Disc_D5.1mm_W3.2mm_P5.00mm | C1, C2 |
| 1 | 470NF 2200uF_25V | CP_Radial_D18.0mm_P7.50mm | C3 |
| 1 | 100NF 100nF | C_Disc_D5.1mm_W3.2mm_P5.00mm | C4 |
| 1 | 220UF/16V 220uF_16V | CP_Radial_D8.0mm_P3.80mm | C5 |
| 1 | 220UF/16V 100nF | C_Disc_D5.1mm_W3.2mm_P5.00mm | C6 |
| 1 | 680UF/35V 10uF_16V | CP_Radial_D5.0mm_P2.50mm | C7 |
| 1 | 100nF | C_Disc_D5.1mm_W3.2mm_P5.00mm | C8 |
| 1 | 680K 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 680K 2K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 100K 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 4 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R5, R8, R13 |
| 2 | 330R 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R11 |
| 1 | 680K 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 1 | 330R 330 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 2 | 10K 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R12 |
| 1 | 330R/2W 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R14 |
| 2 | 10K 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R17 |
| 1 | 10K 150 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16 |
Water Level Monitor and Control design files
The KiCad project lives in the jsitech4/Projects repository on GitHub; these links point at the commit this page was built from.
- LayoutNODEMCU/Water_Level_Monitor_and_Control/hardware/Water_Level_Monitor_and_Control.kicad_pcb
- SchematicNODEMCU/Water_Level_Monitor_and_Control/hardware/Water_Level_Monitor_and_Control.kicad_sch
- BOMESP32/Smart_Hybrid_IOT_energy_management_System/production/bom/Smart_Hybrid_IOT_energy_management_System_BOM.xlsx
Water Level Monitor and Control: common questions
What microcontroller does the Water Level Monitor and Control use?
The Water Level Monitor and Control is built around the ESP32-WROOM, from the ESP32 family.
How big is the Water Level Monitor and Control PCB?
The Water Level Monitor and Control measures 88.6 × 88.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Water Level Monitor and Control?
51 components, from 41 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Water Level Monitor and Control design files?
From the jsitech4/Projects repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Water Level Monitor and Control design in my own project?
The repository has no license, so all rights stay with jsitech4. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Water Level Monitor and Control without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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