Design of AD conversion and stepper motor control based on AT89C2051 Aiming at the problem of excessive sky illumination in the actual application of high-altitude large-target sky curtain targets for field measurement of projectile velocity, a solution of adjustable diaphragm is proposed. The circuit combining AT89C2051, ADC0809 A/D converter and stepper motor is used to control the adjustable diaphragm to solve the measurement problem of excessive sky illumination. The performance characteristics of AT89C2051 and the basic principles of A/D conversion of ADC0809 are introduced, and the circuit design of A/D conversion of ADC0809 and 28BYJ01A stepper motor control is introduced in detail, and the software design of the overall control circuit is briefly described.
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