ON 20020305@8:08:38 AM at page:
http://www.piclist.com/techref/member/seanbhoygh-hotmail-com/index.htm
seanbhoygh-hotmail-com    added 'Questions:

Hi my name is Sean and i am a 1st year mechatronics student.For my
mechatronics project i have to create an auto-pilot based system for a
model
helicopter. The problem i have is trying to program the PIC = P16C74A. The
helicopter consists of 4 ultrasonic recievers/transmitters at the bottom of

the helicopter. These are used to find out the height at which the
helicopter is flying at. This is to be done using a timer. The pic is used
to program the transmitters to send out ultrasonic signals and then listen
for them to return and the timer will stop. This is repeated for the other
3
transmitters/recievers. This is done so that we can find out if the
helicopter is flying level and if not, this must be corrected somehow! The
function of the helicopter is to take off and reach a height of 2m before
flying forward for 10 seconds and then landing again without crashing. I
would be so grateful if anyone could help me with this program as it would
take some weight off my shoulders! if you can help me please send an email
to my email address Thank you

'