28119 Parallax Inc, 28119 Datasheet - Page 41

• Manufacturer Part Number: 28119
• Description: KIT UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc

Specifications of 28119

• Lead Free Status: Contains lead
• Accessory Type: Oscilloscope
• Interface Type: USB
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Summary
This chapter demonstrated how to measure a servo pulse signal using the Paired Bars
cursor settings option. This chapter also provided a visualization of servo control signals,
which will aid in understanding timing and control in your other BASIC Stamp robotics
programs.
Exercises
Further Investigation
“Advanced Robotics with the Toddler”, Student Guide, Version 1.2, Parallax, Inc.,
2003
“What’s a Microcontroller”, Student Guide, Version 2.0, Parallax, Inc., 2003
1. In the ServoSweep.bs2 program, a
2. Explain the difference noticed in the Plot Area when you set the Trigger Edge
3. Explain the correlation between the pulse width variation and servo position you
4. Set the Mouse Function switch to Zoom to take a very close look at the leading edge
5. While the OPTAscope is still monitoring the servo pulses, set the time base to 2
sent to the servo. What are the smallest and largest values that you can use and
still maintain useful servo control? Program the BASIC Stamp with a larger
delay between pulses, observe the results and measure with the OPTAscope.
switch from Rising to Falling and back again.
observed in Activity 2.
of a servo pulse. Is it made up of perfectly straight lines? Explain your answer.
ms/div using the Horizontal dial. Set the Trigger Edge switch to Falling , and set the
Trigger Mode switch to Normal . What do you see? Why is that so?
This text, authored by Ken Gracey of Parallax and Bill Wong, can be viewed as
an in-depth application of standard servo control. Chapters 2 through 4 provide
a series of experiments that program the Toddler to walk bipedally through the
precise control of two standard servos. It is available online from the Stamps in
Class Curriculum menu on the Education page at www.parallax.com.
In this text written by Andy Lindsay, Chapter 4 provides numerous servo control
examples. It is available online from the Stamps in Class Curriculum menu on
the Education page at www.parallax.com.
PAUSE
command is used to pace the pulses