PBASIC2C/P Parallax Inc, PBASIC2C/P Datasheet
PBASIC2C/P
Manufacturer Part Number
PBASIC2C/P
Description
BASIC STAMP 2 INTERPRETER CHIP
Manufacturer
Parallax Inc
Datasheets
1.122-28176.pdf
(4 pages)
2.122-32000.pdf
(7 pages)
3.28139.pdf
(2 pages)
4.PBASIC2CP.pdf
(1 pages)
Specifications of PBASIC2C/P
For Use With
28803 - KIT BOARD OF EDU W/O PWR SUPP28300 - MOTHERBOARD BASIC STAMP 2PE28150 - BOARD OF EDUCATION28103 - KIT FULL BOARD OF EDUCATION
Lead Free Status / Rohs Status
Details
Other names
PBASIC2/P
PBASIC2/P
PBASIC2/P
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PBASIC2C/P
Manufacturer:
Parallax
Quantity:
135
Errata for Process Control v1.0 (#122-28176)
Chapter 4 Opto-Reflective Switch Use
Background
The opto-reflective switch is used predominately in Chapter 4 as a means to illustrate sensor
sensitivity and response in relation to the sizing of the pull-up resistor on an Infrared (IR)
phototransistor's collector. This errata note will assist in successfully completing Chapter 4
activities and demonstrating the principles intended.
The principle in operation is that an IR LED emits infrared light which is reflected to the
phototransistor from a white surface in close proximity causing the phototransistor to conduct
within its linear range. A black surface will absorb the IR preventing the transistor from
conducting sufficiently. By adjusting the collector resistance (R
how this value affects both the sensitivity and the response of the sensor and BJT transistors in
general.
Issues relating to the successful completion of Chapter 4 activities using the opto-reflective
switch include:
Recommendations are provided, but it will rely upon the understanding of the principles of those
conducting the experiments to ensure their objectives are being met by adjusting test parameters
as necessary to achieve desired results.
Ambient IR Sources
The phototransistor is extremely sensitive to IR light, and as such, care should be taken to
prevent ambient light sources from affecting the experiment. Sunlight, and in some cases
fluorescent light, can affect measurements of the sensor. Care should be taken to limit these
sources if they appear to be affecting the experiment.
Recommendations
When testing Activity #1, position the reflector approximately 2 cm from the detector and
determine the voltage output of the sensor. Darken the area of the experiment as best as possible
and measure once again. There should be no significant voltage change (< 0.5 V).
• Ambient IR sources.
• Part substitution from authorship to publication.
• Reflectivity of inks.
© Parallax, Inc. • Errata for Process Control v1.0 (#28176)
Web Site: www.parallax.com
Forums: forums.parallax.com
Sales: sales@parallax.com
Technical: support@parallax.com
•
v1.0 5/22/06
C
) the text intends to illustrate
Office: (916) 624-8333
Fax: (916) 624-8003
Sales: (888) 512-1024
Tech Support: (888) 997-8267
•
Page 1 of 4
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PBASIC2C/P Summary of contents
Page 1
Errata for Process Control v1.0 (#122-28176) Chapter 4 Opto-Reflective Switch Use Background The opto-reflective switch is used predominately in Chapter means to illustrate sensor sensitivity and response in relation to the sizing of the pull-up resistor on ...
Page 2
Part Substitution from Authorship to Publication A part substitution was made during editing and formatting of the text from one which was tested and used by the author to the QRB1114. The IR phototransistor in the QRB1114 has a much ...
Page 3
Page 87 recommends moving your hand toward and away from the QRB1114 sensor. The box labeled VCE should show different readings as you move your hand. If the VCE readings do not change, something is amiss, and it is ...
Page 4
IR light and register as a high. The number of transitions is counted to arrive at the RPM of the fan. Recommendations Not all inks absorb IR equally and some may be reflective to this wavelength of light. ...