Didactic system for teaching microcontrollers - Case study: design of a digital tachometer

Julián R. Camargo L., Miguel A. Díaz O., Orlando García Hurtado

Abstract


This document presents in a didactic way the development of a digital tachometer that can measure speeds up to 800 RPMs (Revolutions Per Minute), using a PSoC5LP, which includes an alphanumeric LCD, an optical sensor, a DC motor and the additional components required for its operation. For the visualization of the information generated by the system, the alphanumeric LCD of 2x16 characters is used. PSoC5LP interrupts are used to measure the motor speed generated by the optical sensor and the data is updated on the LCD every three seconds. The measurements captured by selecting different engine speeds were verified and compared practically. With the above, the objective of showing in a practical way the use of the concept of interruption and various elements associated with the teaching of microcontrollers and specifically the PSoC5LP would be fulfilled.

Keywords


Interruption; LCD; optical sensor; PSoC5LP; slotted disk

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References


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