PIC Tape Measure by John Becker -------------------------------
EPE Online, November 1998
This ultrasonic distance calculator uses a PIC16C84 with a pair of 40kHz ultrasonic transducers to create a solid-state digital version of the traditional tape measure. Battery operated, compact hand-held design.
The EPE Online PIC tape Measure drives an LCD display to show the measuring distance in metres as well as feet and inches. A special 'mask' function permits screening out of echoes generated by objects in the foreground.
The latest version of this software is availale from EPE Online's Web site at www.epemag.com (just check in the library).
The 'tape99' files are associated with the standard version of the PIC tape measure, while the 'tape100' files are associated with the extended version allowing 30 measurements to be stored.
Please refer to the constructional article in the November 1998 issue of EPE Online for more details. Also, please check the EPE Online Web site for details of subscriptions, Back Issues, PCB availability, and so forth.