28125 Parallax Inc, 28125 Datasheet - Page 119
28125
Manufacturer Part Number
28125
Description
TEXT ROBOTICS
Manufacturer
Parallax Inc
Datasheet
1.28125.pdf
(360 pages)
Specifications of 28125
Title
Robotics with the Boe-Bot
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
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Your Turn – Testing the Left Wheel
Now, it’s time to run the same test on the left wheel as shown in Figure 3-15. This
involves modifying RightServoTest.bs2 so that the
servo connected to P13 instead of the servo connected to P12.
All you have to do is change the three
instead of
ACTIVITY #3: START/RESET INDICATOR CIRCUIT AND PROGRAM
When the voltage supply drops below the level a device needs to function properly, it’s
called brownout.
processor and program memory chips go dormant until the power supply voltage returns
to normal levels. A drop below 5.2 V at Vin results in a drop below 4.3 V at the BASIC
Stamp’s internal voltage regulator output. A circuit called a brownout detector on the
BASIC Stamp is always on the lookout for this condition. When brownout occurs, the
brownout detector disables the BASIC Stamp’s processor and program memory.
√
√
√
√
√
√
Save RightServoTest.bs2 as LeftServoTest.bs2.
Change the three
PULSOUT 12
Save and then run the program.
Verify that it makes the left servo turn clockwise for 3 seconds, stops for 1
second, then makes the servo turn counterclockwise for 3 seconds.
If the left wheel/servo does not behave as predicted, see the Servo Trouble
Shooting section on page 104.
If the left wheel/servo does behave properly, then your Boe-Bot is functioning
properly, and you are ready to move on to the next activity.
PULSOUT 12
The BASIC Stamp protects itself from brownout by making its
.
.
PULSOUT
Clockwise 3 seconds
Stop 1 second
Counterclockwise 3 seconds
commands so that they read
PULSOUT
commands so that they read
PULSOUT
Figure 3-15
Testing the Left
Wheel
commands are sent to the
PULSOUT 13
PULSOUT 13
instead of
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