Analog Out

# Prototyping board (breadboard)
# Power supply connector
# 5-15VDC power supply
# Assorted wires
# 5V regulator
# PIC 18F452 or BX-24
# Serial cable
# DB9 female serial connector & headers
# LED's
# Switch
# Servomotor
# variable resistor
# 220 ohm resistors

 

Analog out: potentiometer will control the Servomotor

 

 

code: pulseWidth var byte ' set up constants with the minimum and maximum pulsewidths minPulse CON 50 maxPulse CON 250 ' set up a constant with the time between pulses: refreshPeriod CON 20 ' set an initial pulsewidth: pulseWidth = minPulse main: 'take the output pin low so we can pulse it high Low PORTC.3 ' pulse the pin PulsOut PORTC.3, pulseWidth ' pause for as long as needed: Pause refreshPeriod ' change the angle for the next time around: IF pulseWidth > maxPulse Then pulseWidth = minPulse Else pulseWidth = pulseWidth + 1 Endif GoTo main