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A schematic diagram of a water tank system is shown in Figure 3 , consisting of 5 floaters. When there is water, terminals 2 and

A schematic diagram of a water tank system is shown in Figure 3, consisting of 5 floaters. When there is water, terminals 2 and 3 are connected, and when there is no water, terminals 1 and 2 are connected. When AB is powered, the display screen is illuminated. The voltage parameters are 1.2 to 1.8V, and the current parameters are 3 to 5mA.
The hardware circuit of the system is illustrated in Figure 5. KOI, KIL, K21, K31, K41 are connected to the 74SL245 circuit, while K02, K12, K22, K32, K42 are grounded. The A end of the display is connected to the 74LS273 circuit. The CS0 address is 40H, and the CS1 address is 41H
Analyze and calculate the optimal resistor parameters based on the given information, draw a flowchart and write a program. (Requirement: Ensure that the number of water levels in the water tank matches the number displayed on the LED display.)
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