Laboratory Timing for Apple II Computers

Precision Timer

This program allows you to use your Apple II as a precise and very versatile laboratory timer. The timing is started and stopped as objects move through photogates. There are 15 different timing modes; times are measured and displayed to the 0.01 ms. This one program should be able to do just about any timing you need to do in a science lab, including falling objects (acceleration due to gravity), rolling objects, air track gliders, pendulum or other oscillating objects, strobe lights and camera shutters, bouncing objects (coefficient of restitution), and manual "stopwatch" timing. A special mode is included that allows a detailed study of the motion of a "picket fence" object. Move (or drop) the object through a photogate and in a few seconds you can display displacement vs. time, velocity vs. time, and acceleration vs. time graphs on the monitor. The graph below shows the results of a free fall experiment.

Photogates

We sell both parts kits and assembled photogates. Our photogate parts kit includes everything you need to build a complete photogate system (connector box plus photogates). We also sell an assembled photogate. To connect one or two of the assembled Vernier photogates to the Apple II 9-pin game port, you need an adapter (PG-ADP9).

ORDERING INFORMATION:

Precision Timer III Software (Order Code PT-A, $39.95)
3-Photogate Parts Kit (Order Code 3PG-9, $40.00)
(9-Pin cable for Apple IIe or IIGS)
3-Photogate Parts Kit (Order Code 3PG-16, $40.00)
(16-Pin cable for Apple II+)
2-Photogate Parts Kit (Order Code 2PG-9, $35.00)
(For Apple IIc only)
Vernier Photogate (Order Code VPG-DG, $40.00)
Adapter (9-pin) for 1 or 2 assembled photogates (Order Code PGADP-9, $30.00)