28128 Parallax Inc, 28128 Datasheet - Page 103

• Manufacturer Part Number: 28128
• Description: KIT BASIC ANALOG/DIGI PARTS ONLY
• Manufacturer: Parallax Inc

Specifications of 28128

• Accessory Type: ADC, DAC
• Product: Microcontroller Accessories
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

If you were to rotate the Stamp-O-Scope display a quarter turn counter-clockwise, it
would resemble the display of a normal oscilloscope. Figure 5-4 shows the Stamp-O-
Scope rotated this way. It also shows three of the most basic measurements taken on an
oscilloscope: amplitude, frequency, and DC offset. An oscilloscope typically displays
time on the horizontal scale and voltage on the vertical scale. Time passes across an
oscilloscope screen from left to right, and as the wave gets higher in the screen, the
voltage is higher. Most graphs of time varying waveforms are also presented in this
format.
Figure 5-3
Output Sample of Time-
Varying Waveform
For Program Listing 5.1 is the
Stamp-O-Scope display. The
waveform displayed is
commonly referred to as a
triangle wave.