Project paper - The Department of Physics and Astronomy

8 Appendix: Code/∗B l i n k i n gmotorsListing 1: ”Blink Flow”This s c r i p t turn one ouput high , then the o t h e r with a d e l a y o f 1 second .∗/// Pin 13 has an LED connected on most Arduino boards .// g i v e i t a name :// Output pins are 4 and 12i n t out1 = 4 ;i n t out2 = 1 2 ;// i n t = 13;// the s e t u p r o u t i n e runs once when you p r e s s r e s e t :void s e t u p ( ) {// i n i t i a l i z e the d i g i t a l pin as an output .pinMode ( out1 , OUTPUT) ;pinMode ( out2 , OUTPUT) ;}// the loop r o u t i n e runs over and over again f o r e v e r :void l o o p ( ) {d i g i t a l W r i t e ( out2 ,LOW) ;d i g i t a l W r i t e ( out1 , HIGH ) ; // turn the LED on (HIGH i s the v o l t a g e l e v e l )d e l a y ( 3 0 0 0 0 ) ; // wait f o r 10 secondsd i g i t a l W r i t e ( out1 , LOW) ; // turn the LED o f f by making the v o l t a g e LOWd i g i t a l W r i t e ( out2 , HIGH ) ;d e l a y ( 3 0 0 0 0 ) ; // wait f o r 10 seconds}Listing 2: ”Read Speed from Sensor”/∗ Read Analog Voltage o f one motor and p r i n t s frequency o fs i g n a l from analog i n p u t to s e r i a l v i a MegunoLink∗/// d i g i t a l output pins o f the two DC motor r e l a y c o n t r o l si n t motor1 = 4 ;i n t motor2 = 1 2 ;// middle o f v o l t a g e s i g n a l f o r frequency readingi n t t h r e s h o l d = 3 5 ;15