Arduino Uno Quick Start Manual page 249

We define a list of member names that is terminated by a NULL pointer. The
list s first entry is "nobody," so we don t have to deal with the rare edge case
when nobody is to blame. Then we use
and pass this object to the
More Motors Projects
Motors are fascinating. Search the Net, and you ll find numerous projects combining
the Arduino with motors. Most of them probably deal with robots
cars.
You ll also find useful and exciting project like the USB hourglass.
and a servo motor to turn a sand timer, and it observes the falling sand using an
optical sensor. Whenever all the sand has fallen through, the device turns the timer
automatically.
That s all nice, but the device s main purpose is to generate true random numbers.
Falling sand is a perfect basis for generating true randomness (see
Numbers, on page 48), and the USB hourglass uses the signals from its optical sensor
to generate random numbers, sending them to the serial port.
a. http://makezine.com/projects/building-a-simple-arduino-robot/
b. http://makezine.com/2009/12/23/usb-hourglass-random-number-generat/
In the setup function, we initialize the serial port and attach the
servo motor to the pin we defined in
by blaming "nobody."
The loop function is nearly the same as in
page 227. The only difference is that we do not control a servo directly, but
instead call blame in line 28.
That s it! You can now start to draw your own display and create your own
arrow. Attach them directly to the motor or—even better—put everything into
a nice box. Compile and upload the software and start to blame.
Of course, you can use motors for more serious projects. You can use them
to build robots running on wheels or similar devices. But you cannot attach
too many motors to a "naked" Arduino, because it isn t meant for driving
bigger loads. So if you have a project in mind that needs a significant number
of motors, you should consider buying a motor shield
shield, such as the Robotics Shield Kit.
5. You can find them at
6. http://www.parallax.com/product/130-35000
Chapter 13. Controlling Motors with Arduino
members
Blaminatr s constructor.
MOTOR_PIN
First Steps with a Servo Motor, on
6
http://adafruit.com or http://makershed.com
www.it-ebooks.info
to initialize a new
Team
a
or remote-controlled
b
It uses an Arduino
Generating Random
Blaminatr
. Also, we initialize the
5
or using a special
.
234
object
s
Blaminatr
report erratum discuss