The 3 IR/ultrasonic-beacon positioning-project remains one of our major realizations during the academic year 2000/2001.
Now we want to optimize the project according to the following aims:
only two turnable beacons
using a 8-bit D/A converter
at leats 1 positioning per second
compatible with ROBOLAB
increasing the ultrasonic sensitivity
additional LED-indicator to show ultrasonic reception, useful in calibrating the device
no need of oscilloscope nor frequency-meter
perfect user instructions
The reasons for these improvements are clear:
one RCX saved
easy to build, calibrate and use
increasing operational speed
device may be used by secondary students without great knowledge in electronics, C++ programming (legOS) and s.o.
The PIC 16F84 remains the only major difficulty for anybody who wants to reproduce our device. If you have no other possibility, send us a mail plus 15.- US $, and we will send you the programmed PIC.
The PC-boards (sender and receiver) form another problem for beginners! Specially the double-sided receiver-board is difficult to produce. The easiest solution is to send the EAGLE-files directly to PCB-POOL. This specialist firm will return the board ready for use for a prize of about 50 € .
New IR/ultrasonic receiver
Testing and calibrating the device
ROBOLAB sub.vis: Square-root, Arctan, etc.
more ROBOLAB-investigation sub.vis
Download area (741kB)