design a digital speedometer using pic16f877a microcontroller

Digital Speedometer and Odometer Circuit using PIC Microcontroller. Programming your PIC16F877A: As said earlier we will be using the help of timers and interrupts in the PIC16F877A Microcontroller to calculate the time taken for one complete rotation of the wheel. We have already learnt how to use Timers in our pervious tutorial. I have given the complete code of the project at the end of this article.

Digital Speedometer and Odometer Circuit using PIC Microcontroller from pic-microcontroller.com

Circuit Digest 44.4K subscribers Demonstration video of a digital speedometer and odometer circuit built using pic microcontroller PIC16F877A…

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Working of Simple Digital Speedometer Using PIC 16F877A As seen in the circuit diagram, our small GPS digital speedometer requires both 5 V and 12 V power supplies. This is because GPS module needs 12 V and other components require 5 V only.We can generate both these voltages from a single power supply circuit, so 12 V is enough for doing the GPS speed meter project with PIC 16F877A.

Source: pic-microcontroller.com

Lets start with this Digital Speedometer and Odometer Circuit with PIC. Simulation: The Simulation for this project is done using Proteus. Since the project involves moving objects it is not possible to demonstrate the complete project using simulation but the working of the LCD can be verified. Simply load the hex file to the Simulation and simulate it. You will be able to notice the LCD working as shown below.