Instructions Circuit Diagram

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11. TEST AND OPERATION
Aftercompletingtheassembly,wewillstartmovingtherobot.Butrstwehavetond
and eliminate the errors we could have made in the previous phase, without destroying
any parts.
11.1. RS232-Infrared-Transceiver
The following operational check is limited to the RS232-Infrared-Tranceiver.
First of all the IR-Transceiver must be checked, as it will be needed for the next step:
the selftest of the system. For this test connect the IR-Transceiver to a free serial
interface of your PC with the supplied 9-pole serial extension cable and start the
Windows terminal program “Hyperterminal” (or for a Linux-system eg. “Minicom”).
NormallyyouwillndthisprograminWindowsinthecategoryAddons-->
Communication --> Hyperterminal. If the program is not available, you can install it
from the Windows-CD.
AfterstartingtheHyperterminalprogramyouwillbeaskedtodeneanameforthe
connection. You may choose YETI or any other symbol. In the next window you choose
“connect by” and the COM-interface by which the transceiver has been connected in the
previous step.
Then press “OK” and choose the following settings:
• Bits pro Second: 2400
• Databits: 8
• Parity: none
• Stopbits: 1
• Flowcontrol: none
Press“OK”againforconrmation
Hold the IR-Transceiver at the distance of 10 cm over a white sheet of paper. The
component side must be directed towards the paper sheet.
Press a few keys at your computer terminal.
The terminal program normally should display the key-symbols. The IR-Transceiver
transmitsthekey-symbolsbyIR-Diode(D5),thetransmittedsignalreectsatthepaper
surface and is send back to receiver-IC (IC2), from which it is being returned to the
computer. If no symbols or wrong symbols are being displayed, you may carefully turn
the trimmer between its extreme left and right position. Use a miniature screwdriver and
strike a few keys at each position of the trimmer until the correct symbols are displayed.
If you do not have any success in this procedure, we do have a problem with the circuit,
which should be solved. (see Appendix H or www.arexx.com for help).
Just to be sure you should remove the IR-Transceiver after this test and hit a few keys.
This time the display is expected to show no symbols any more.