Page 276 - Amphibionics : Build Your Own Biologically Inspired Robot

Amphibionics 06 3/24/03 9:02 AM Page 255
Chapter 6 / Crocobot: Build Your Own Robotic Crocodile
Insert the 16C71 into the 18-pin socket on the remote control cir-
cuit board. Turn the power on at the robot, and then turn on the
power to the remote control. When the button on the remote con-
trol is pushed, the LED above the button will light up, indicating
that a transmission has been sent. At the same time, the piezo
speaker on the robot will make a couple of tones each time the
button is pushed. You should also notice that the LED next to the
receiver module on the robot’s controller board will flash on and
off rapidly, as data comes through. If nothing happens when the
button is pushed, check all of your wiring and battery supplies.
Once the units are working together correctly, you can check the
range of the transmitter by walking away from the robot and hold-
ing the push button on the remote control down. For later experi-
mentation, you can program this button for other tasks.

'------------------------------------------------------------------------------------------------------------------------------
PROGRAM 6.9
' Name : transmit-test.bas transmit-test.bas
' Compiler : PicBasic Pro - MicroEngineering Labs program listing
' Notes : Program to test wireless link using the
' : Linx 433LC series transmitter and receiver
'------------------------------------------------------------------------------------------------------------------------------
' set PortA inputs
trisa = %00011111

' PortB set as outputs. pin 2 input
trisb = %00000100

'------------------------------------------------------------------------------------------------------------------------------
' initialize variables

include "modedefs.bas"

tx_baud CON N2400

txmit VAR PORTB.0

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