In our fast going work time, we forget our water tank motor to switch off when it is filled. So the result waste off many water today. Here my simple Micro-controller circuit is very useful to prevent above water wastage in our house. LCD INDICATOR. LCD Liquid Crystal display is used to indicate the level of water in the water tank actual level. The status of display is 4 level with water tank hight. 1. Quarter level 2. Half Level. 3. 3/4 level. 4. Full level 5. Water is empty with motor on or condition. LIST OF COMPONENTS USED HERE. 1. AT89C51. 2. BC547 Transistor. 3. 12V relay, 3. 12Mhz Crystral 4. 33 Pf capacitor. 5. Resistor 1k. 6. 12v/1A regulated power supply. CIRCUIT OPERATION. When the water in tank is empty or below quarter level sensor, the motor on to start fill the water tank and also LCD with our circuit is indicate tank is empty and motor on status is displayed. If the water reaches the level of half lcd indicates HALF LEVEL. The motor remain on until water reaches the level of 3/4 level and finally water touch the WATER FULL SENSOR, at this time pump motor goes of off condition. WATER LEVEL INDICATOR CUM CONTROLLER USING AT89C51.
When we use the water and its level gradually decrease near our level sensor, at the time LCD will indicate the level of water in the tank. Lastly blow quarter level sensor again motor start to run and deliver water to out tank again and againt without fail. AT89C51 MICRO CONTROLLER VIDEO.