' NEXUS Robot Mouse VERSION 1.01`  26/09/2003

'-------------------------------------------------------------------------------------
'ASCII art schematic				
'  - - - - - - - - - - - - - - - - - - - -    -ve rail  
'  Piezo        Pin |     Pin |	    |	
'  Pin 0        2 MOTOR1  4 MOTOR2 10k		
'    ------   ______|         |     |		
'   |Picaxe|  ________________|     |            
'   |  08  |  ______________________|
'    ------         Pin 1           |		
'			&           LDR1 
'		   same for Pin 3   |
'	 	     and LDR2       |
' |||		              	    |        	  3-5 V
'Usual 3 wire           + + + + + + + + + +   +ve supply
'prog.input                 
'-------------------------------------------------------------------------------------

main: 				'make a label called "main"
	low 2
	low 4
	gosub sensor_right 	
	gosub sensor_left 
	pause 200
	goto main
	

sensor_right:				'make a label called "sensor_right"
	if pin1 = 1 then motor_left_on	'turn on left motor if right sensor triggered; FOLLOW light
	return 				'return to main

sensor_left: 				'make a label called "sensor_left"
	if pin3 = 1 then motor_right_on 'turn on right motor if left sensor triggered; FOLLOW light
	return 				'return to main 

motor_left_on:
	high 4
	return

motor_right_on:
	high 2
	return