28119 Parallax Inc, 28119 Datasheet - Page 22

• 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

All activities in this text assume that you are using a fresh 9 V battery as your power
supply. Please be aware that using worn-out batteries or alternative power supplies may
alter your voltage signals somewhat from those shown in the book.
For detailed instructions on setting up your BASIC Stamp hardware and software, see
What’s a Microcontroller? under the Further Investigation section at the end of this
chapter.
The Board of Education, BASIC Stamp and HomeWork Board are sold separately. For a
complete list of system and equipment requirements, see Appendix A.
ACTIVITY #1: VIEWING HIGH AND LOW SIGNALS
In this activity we will verify the proper operation of your OPTAscope by viewing simple
high and low signals from the BASIC Stamp.
Parts Required
(1) OPTAscope CH1 probe and ground cable
(2) Jumper wires
Building the High and Low Signals Circuit
This circuit is built the same way for the Board of Education and the BASIC Stamp
HomeWork Board.
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Plug the probe cable into the CH1 jack on the OPTAscope.
Build the simple circuit shown in Figure 1-14 and Figure 1-15.
Connect the OPTAscope CH1 probe to I/O Pin 14 of your BASIC Stamp.
Connect the black probe to the BASIC Stamp’s Vss connection (ground).
Which probe is which?
controls and signals graphics in the software. Connect the blue-tipped probe cable to the
CH1 jack on the OPTAscope, and the red one to the CH2 jack. The green-tipped cable
plugs into the External Trigger TTL jack. In the wiring diagrams, the probes are labeled for
clarity. The active channel probes are colored (CH1 is blue, CH2 is red); the Ground probes
are black.
The OPTAscope probes are color-coded to correspond with