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(as of Jun 05,2023 13:37:45 UTC – Details)
💎【Water Tank Water Level Automatic Control】:Until the water level is lower than the low water level probe again, the aforementioned process will be repeated again, so as to realize automatic control of the water level of the water tank. In this circuit, a manual control circuit is designed, when the WAR switch is pressed, the relay will be forcibly disconnected.
⚡【Supply voltage】: 12V DC
🎯【Circuit principle and introduction of key components】:
🎯【1】:The 12V DC voltage passes through VD1, and one way through R7 lights up the LED1, which is used as a power supply indicator, and the other way is used as the working power supply of the system.
🎯【2】:After the power is turned on, if there is no water in the water tank, the two water level probes are connected to the positive power supply through R1 and R2, that is, the high potential, the 4th pin of IC1 outputs a low level, and after IC1C is processed, the 10th pin outputs a high level , this high level is added to the base of VT1 all the way through R4, so that VT1 is saturated and turned on, the relay is energized and closed, and the pump is started to pump water;
🎯【3】:The other way is connected to pin 2 of IC1 through R8. Since the high water level probe is also high level, after being processed by the NAND gate, the output of pin 3 of IC1 is low level, which locks the NAND gate of IC1C.
🎯【4】:As the water pump continues to supply water to the water tank, the water level in the water tank gradually rises. When the low water level probe is immersed in water, the 6th pin of IC1 becomes low level, and the 4th pin outputs a high level, but the NAND gate has been locked at this time. so that the output will not be affected, and the pump will continue to pump water;
🎯【5】:With the further rise of the water level, when the water level hits the high water level probe, both pins 1 and 6 of IC1 become low level. This change has no effect on pin 4 of IC1, but pin 3 becomes due to pin 1. Low level, the out
⚡【Supply voltage】: 12V DC
🎯【Circuit principle and introduction of key components】:
🎯【1】:The 12V DC voltage passes through VD1, and one way through R7 lights up the LED1, which is used as a power supply indicator, and the other way is used as the working power supply of the system.
🎯【2】:After the power is turned on, if there is no water in the water tank, the two water level probes are connected to the positive power supply through R1 and R2, that is, the high potential, the 4th pin of IC1 outputs a low level, and after IC1C is processed, the 10th pin outputs a high level , this high level is added to the base of VT1 all the way through R4, so that VT1 is saturated and turned on, the relay is energized and closed, and the pump is started to pump water;
🎯【3】:The other way is connected to pin 2 of IC1 through R8. Since the high water level probe is also high level, after being processed by the NAND gate, the output of pin 3 of IC1 is low level, which locks the NAND gate of IC1C.
🎯【4】:As the water pump continues to supply water to the water tank, the water level in the water tank gradually rises. When the low water level probe is immersed in water, the 6th pin of IC1 becomes low level, and the 4th pin outputs a high level, but the NAND gate has been locked at this time. so that the output will not be affected, and the pump will continue to pump water;
