Problem Statement Discussion Electromania

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Presentation transcript:

Problem Statement Discussion Electromania

Tachometer Ever thought how a speedometer in cars, bikes etc. works?? Can we build it using the knowledge on MCU we have so far??

Problem Statement To design a tachometer device that measures the speed (rpm) of a DC motor. Sensor module: This module will contain sensors that will detect the speed of the motor. Display module: This module will receive data from the sensors and calculate the speed. The speed will be displayed on any displaying unit like LCD.

Sensor Module What parameter do we need to calculate speed?? Speed (rpm) = Revolutions per minute = 1/ time for 1 revolution(min) Need to sense the completion of 1 revolution. Possible sensors: TSOP, Laser Rx-Tx

TSOP Sensor It detects IR led blinking at the rate of 38kHz. If IR led detected, output= 0 Otherwise, output =1 Circuit for IR –TSOP pair:

Making the IR led to blink at 38kHz Need to generate the following square wave- Use of Timers

Hardware Description Calculate the speed of above given motor. Need to sense the completion of 1 rotation using the IR- TSOP pair.

Display module Receives data from sensors Data in case of TSOP sensor: The instant when a revolution is completed. Computing Speed: 1. We have the instants when 1 revolution is completed. 2. We can find time between 2 such instants using timers. Displaying the speed on LCD.

Details for Competition Ideas Discussion & Component Distribution: Date :11th and 12th January; Venue: E-club, Hall 3 Come with complete circuit diagram and a pseudo-code for the program to be written on MCU. Prelims: 20th January 12 Problem Statement for Prelims: Detection of obstacle using IR- TSOP pair and displaying the same on LCD Main event: 28th & 29th January 12

Contacts ECDC Coordinators: Neeraj Kulkarni 8960482773 Anupam Kumar 9598748877 Shadab Alam 9532095037