This is the very simple transistor-based five-step water level indicator for home and industries to use to monitor the level of the water tanks. It is corrosion-free and used for any conductive or non-corrosive liquids using this circuit.
Working Principle:
In this circuit, we have used 5 transistors that act as a switch. When Transistor’s base terminal gets a signal from the electrode probe then the transistor will be switched ON (act as a close switch) to turn ON the LED.
The main source 6VAC electrode probe (P1 Pin No 2 (A)) is placed at bottom of the tank and place the other probes step by step as per the volume of your tank. When tank water is rising that proportional LEDs will start glowing.
Circuit Diagram:
Wiring Diagram:
Use the aluminum wires with end insulation removed for all the probes. Arrange the probes as shown in the picture above.
PCB layout:
This is the single-side PCB Layout. While I'm designing the PCB I've followed the below JLCPCB guidelines for the PCB Capabilities. it is really helpful.
https://jlcpcb.com/capabilities/Capabilities
PCB 3D View:
Now you can order the PCB from JLC PCB 1-4 Layer at only $2, Please check the link below
About JLCPCB
JLCPCB (Shenzhen JIALICHUANG Electronic Technology Development Co., Ltd.), is the largest PCB prototype enterprise in China and a high-tech manufacturer specializing in quick PCB prototype and small-batch PCB production. With over 10 years of experience in PCB manufacturing, JLCPCB has more than 200, 000 customers at home and abroad, with over 8, 000 online orders of PCB prototyping and small quantity PCB production per day. The annual production capacity is 200, 000 sq.m. for various of 1-layer, 2-layer or multi-layer PCBs. JLC is a professional PCB manufacturer featured of large scale, well equipment, strict management, and superior quality.
