70009 Parallax Inc, 70009 Datasheet - Page 65
![BOOK UNDERSTANDING SIGNALS](/photos/26/92/269208/70009-l_sml.jpg)
70009
Manufacturer Part Number
70009
Description
BOOK UNDERSTANDING SIGNALS
Manufacturer
Parallax Inc
Type
Signal Analysisr
Datasheet
1.70009.pdf
(137 pages)
Specifications of 70009
Style
Book
Title
Understanding Signals
Contents
Guide to Generate, View and Measure Wave Forms
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
Other names
70009PAR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
700090B
Manufacturer:
COPAL
Quantity:
5 510
Company:
Part Number:
70009CB
Manufacturer:
VISHAY
Quantity:
5 510
Part Number:
70009GB
Manufacturer:
TI/PHILIPS
Quantity:
20 000
If you are using the HomeWork Board, your calculation must account for the added
resistor value:
Again, your actual measurements may vary in accordance with the tolerances of the
resistor and capacitor you use.
ACTIVITY #2: VARIABLE RESISTORS IN AN RC NETWORK
In this activity we will measure the discharge time of an RC network and compare it to
the BASIC Stamp
(such as a photoresistor) with a known capacitor and resistor and measure it against the
OPTAscope to see how the two values compare.
Parts Required
(1) 220 Ω resistor
(1) 10 µF capacitor
(1) Photoresistor
(5) Jumper wires
Building the Photoresistor RC Network Circuit
Add a photoresistor to amend the circuit you previously built to match the schematic
(Figure 4-9) andwiring diagram (Figure 4-10). The 220 Ω resistor and 10 µF capacitor
will act as a filter for the
DEBUG
Time
Time
Time
FREQOUT
Time
Time
Constant
values. Then, we will calculate the value of a variable resistor
Constant
Constant
Constant
Constant
command to create a sine wave.
=
=
0.0122
=
(
0.01
220
=
=
1220
1000
seconds
+
seconds
1000
x
x
0.00001
0.00001
)
x
or
or
0.00001
10
12.2
ms
ms