28029 Parallax Inc, 28029 Datasheet - Page 55

• Manufacturer Part Number: 28029
• Description: KIT PARTS SMART SENSORS W/TEXT
• Manufacturer: Parallax Inc

Specifications of 28029

• Accessory Type: Parts Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: BASIC Stamp® or Javelin Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 28029PAR

Figure 2-3: Ping))) Sensor Schematic and Wiring Diagram
Testing the Ping))) Sensor
As mentioned earlier, the Ping))) sensor needs a start pulse from the BASIC Stamp to
start its measurement. A pulse to P15 that lasts 10 µs (
detected by the Ping))) sensor, and it only takes a small amount of time for the BASIC
Stamp to send. A
pulse (
this example, the result the
time for the Ping))) sensor's chirp to get to the object, reflect, and return.
Example Program - PingTest.bs2
You can test this next program by measuring the distances of a few close-up objects. For
close-up measurements, the Ping))) sensor only needs to be 3 to 4 inches ( roughly 8 to
10 cm) above your working surface. However, if you are measuring objects that are
more than a half a meter away, you may need to elevate your Ping))) sensor to prevent
echoes from the floor registering as detected objects.
√
√
√
√
PULSIN 15, 1, time
Place your Board of Education with the Ping))) sensor circuit on something to
keep it at least 8 cm above the table surface.
Place an object (like a water bottle, box, or paper target) 15 cm from the front of
the Ping))) sensor.
Enter, save, and run PingTest.bs2.
The Debug Terminal should start reporting a value in the 400 to 500 range.
PULSIN
command that stores the duration of the Ping))) sensor's echo
PULSIN
) has to come immediately after the
command stores in the variable
Chapter 2: The Ping))) Ultrasonic Sensor · Page 43
PULSOUT 15, 5
PULSOUT
time
is the round trip
command. In
) is easily