Please forward this error screen to sharedip-1666228125. A simple Water level indicator project with circuit diagram for home and water level indicator using 555 timer project report pdf. This water tank level sensor can be used for any liquid level indicator projects. Looking for Latest Electronics Project Kits?
In fact the the level of any conductive non corrosive liquids can be measured using this circuit. The circuit is based on 5 transistor switches. Each transistor is switched on to drive the corresponding LED , when its base is supplied with current through the water through the electrode probes. 6V AC is placed at the bottom of tank. Other probes are placed step by step above the bottom probe. When water is rising the base of each transistor gets electrical connection to 6V AC through water and the corresponding probe. This in turn makes the transistors conduct to glow LED and indicate the level of water.
The ends of probes of the water tank level indicator are connected to corresponding points in the circuit as shown in circuit diagram. Insulated Aluminum wires with end insulation removed will do for the probe. Arrange the probes in order on a PVC pipe according to the depth and immerse it in the tank. AC voltage is use to prevent electrolysis at the probes. So this setup will last really long. I guarantee at least a 2 years of maintenance free operation.
That’s what I got and is still going. Use a transformer with 6V 500 mA output for power supply. Do not use a rectifier! Use good quality insulated Aluminum wire for probes. If Aluminum wires are not available try Steel or Tin.
Try the circuit first on a bread board and if not working properly, make adjustments with the resistance values. This is often needed because conductivity of water changes slightly from place to place. The type number of the transistors used here are not critical and any small signal NPN transistor will do the job. Few other suitable type numbers are BC546, BC107, PN2222, BC337, BF494, ZTX300, BEL187 etc. The circuit can be enclosed in a plastic box with holes for revealing the LEDs .
Water Level Indicator Circuit Diagram and Sensor Arrangement. The circuit is fully based primarily on transistors. The sensing section is somewhat similar to this circuit but there is additional circuitry for switching the pump ON when the water level falls below a set level and the pump will be switched OFF when the tank is full. Few transistors , one 555IC and an electromagnetic relay is used for realizing the control section. The circuit is very simple cost effective , reliable and many guys have successfully assembled it. The level sensor section is finished and now I am working on the control circuitry. This water level controller monitors the level of the over head tank and automatically switches on the water pump when ever the level goes below a preset limit.