2 layers129.9 × 63.6 mm
Traeger rev 2.3.0.kicad pro
jazzmonger/Traeger-PID-Controller
Traeger Smoker/Grill Controller based on an
45 parts36
2 layers76.5 × 123.8 mm
Water Level Indicator
Manideep136/Water-Level-IndicatorThis project is an ESP32-based Water Level Indicator PCB designed to monitor the water level in a tank using an ultrasonic sensor and provide visual and audible alerts.
- Size
- 76.5 × 123.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 35
- Pads
- 61
- Tracks, vias
- 77, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Sep 2026
- Updated
- 24 Sep 2026
Overview
Water Level Indicator is an open-source printed circuit board by Manideep136, from the Manideep136/Water-Level-Indicator repository on GitHub. It is a 2-layer board of 76.5 × 123.8 mm with 13 parts on 35 nets, routed with 77 tracks and 2 vias.
It is built around the HLK-PM01 and BC547. Its parts include 6 connectors, 2 resistors, 1 IC, 1 diode and 1 transistor.
Main components
2README
README.mdWater-Level-Indicator
Project Overview
This project is an ESP32-based Water Level Indicator PCB designed to monitor the water level in a tank using an ultrasonic sensor and provide visual and audible alerts.
The PCB is designed in KiCad and provides connections for an ESP32 DevKit V1 (30-pin), ultrasonic sensor, OLED display, buzzer, LED indicator, push button, and power supply.
The ESP32 processes the distance measured by the ultrasonic sensor and determines the approximate water level. The status can be displayed on an OLED and indicated using LEDs and a buzzer.
Features ESP32 DevKit V1 based controller Ultrasonic water-level measurement OLED display interface using I²C LED status indication Buzzer alarm for high/critical water level Push-button input Transistor-driven buzzer circuit Removable ESP32 module Through-hole mounting for ESP32 headers External 5 V DC power input Designed using KiCad PCB layout suitable for prototype/college project development
🚀 Working Principle The ultrasonic sensor sends an ultrasonic pulse toward the water surface. The reflected signal is received by the sensor. The ESP32 calculates the distance to the water surface. The water level is calculated from the tank dimensions. The current water-level status can be displayed on the OLED. LEDs provide visual status indication. The buzzer provides an audible warning when the water reaches a defined critical level. The push button provides an additional user-control interface. 🔧 Future Improvements
Possible future versions can include:
Automatic water pump control Wi-Fi monitoring Mobile/web dashboard MQTT/ThingsBoard integration Water-level percentage calculation Multiple tank monitoring Low-water warning Overflow protection Relay/SSR output Capacitive water-level sensing PCB-mounted voltage regulator and protection circuit ⚠️ Important Design Notes Verify the exact ESP32 DevKit V1 dimensions before PCB manufacturing. Verify the 25.40 mm header row spacing against the physical ESP32 board. Use 2.54 mm pitch headers. Use appropriate voltage-level protection for a 5 V ultrasonic ECHO signal. Keep sensor wiring away from noisy/high-current traces. Use an external certified DC power supply for the prototype. Check ERC and DRC before generating Gerber files. Verify all connector pinouts before manufacturing. 📜 License
This project is intended for educational, academic, and personal development purposes.
Feel free to modify and improve the design for your own projects.
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Conn_01x15_Pin | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-15P_1x15_P5.00mm | J5, J6 |
| 2 | R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2 |
| 2 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J7, J8 |
| 1 | BC547 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_15x7.5RM7.6 | BZ1 |
| 1 | Conn_01x04_Pin | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-04P_1x04_P5.00mm | J2 |
| 1 | HLK-PM01 | Converter_ACDC:Converter_ACDC_Hi-Link_HLK-PMxx | U2 |
| 1 | LED | LED_THT:LED_D3.0mm | D1 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | Screw_Terminal_01x04 | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-04P_1x04_P5.00mm | J3 |
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Questions
How big is the Water Level Indicator PCB?
It measures 76.5 × 123.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Water Level Indicator use?
13 parts, built around the HLK-PM01 and BC547. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Water Level Indicator KiCad files?
From the Manideep136/Water-Level-Indicator repository on GitHub, at the commit this page was made from: the board is Water Level Indicator/Water Level Indicator.kicad_pcb and its schematic Water Level Indicator/Water Level Indicator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Water Level Indicator design in my own project?
Its repository states no licence, so its author keeps all rights: ask Manideep136 before reusing the design.