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Dear experts,

I am studying electronics, but there is an experiment in our school that is the design of a digital frequency meter, which I have never encountered before, so I beg you to give me some guidance. I would be grateful.

index

1. The test frequency range is: 1Hz～1MHz.

2. The range is divided into three levels: Level 1: When the gate time is 1S, the maximum reading is 999.999KHz

Second gear: When the gate time is 0.1S, the maximum reading is 9999.99KHz

Level 3: When the gate time is 0.01S, the maximum reading is 99999.9KHz.

3. Display working mode: a. Use BCD seven-segment digital tube to display the reading.

b. Using memory display method

c. Blanking of meaningless high-order zeros.

Require

(1) Design a solution that meets the design requirements

(2) Design unit circuit

(3) Use EDA software to simulate each unit circuit and the overall circuit

(4 ) Use EDA software to implement the design on the ELB electronic course design experiment box