70009 Parallax Inc, 70009 Datasheet - Page 32
![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
The
The
and the second argument, 750, is a variable or constant (0 – 65,535) that specifies the
duration of the pulse in 2 µs increments. A pulse of 1.5 ms sent every 20 ms positions the
servo in its centered location. Here is how this is calculated:
or
Now that we know the value for the
program the BASIC Stamp. With an output pulse of 1.5 ms, the expected result from the
servo is that it centers itself and stays put.
1.5
PulseWidth
2
PULSOUT
PULSOUT
×
PULSOUT 5, 750
1,000
Servo power supply voltage is critical; applying more than ~6.5 VDC to servos will
permanently damage them.
rather than the schematics and a 9 V battery in the following Activity, please note:
The Board of Education Rev B has four servo ports (P12-P15) appearing in a terminal block
header on the right side of the board. The power supply for these ports is connected directly
to Vin (the input voltage). If you are using a wall pack (anything more than +6 V) don’t plug
the servos into the terminal block – you’ll put 9-15 V on the servos and they’ll be destroyed.
The terminal block is strictly for battery powered applications where the battery voltage is 6
VDC.
The Board of Education Rev C has a jumper selector that allows the user to select Vin or
Vdd for the servo supply power. Consider your power supply and position this jumper
appropriately if you choose to use the servo ports.
If you wish to use a higher input supply voltage, use the +5 V (Vdd) power supply above the
breadboard, and plug the servos into the breadboard using the 3-pin male/male header pins.
This will save many headaches and time lost destroying servos.
2
command is used in the following activities. It has this format:
command’s first argument, 5, states the BASIC Stamp I/O pin to be used,
=
(ms)
750
×
1,000
=
Variable
PULSOUT
If you wish to use the Board of Education Servo ports
' 1.5 ms pulse on P5
command, we can build the experiment and