Control Angle via Button Pushes
Download
1 / 12

Control Angle via Button Pushes - PowerPoint PPT Presentation


  • 88 Views
  • Uploaded on

Control Angle via Button Pushes. One button increases angle. Other decreases angle. Both light LED. Servo Control Using Analog Signal. Obtain “analog” input using analogRead () . Voltage, V. Voltage tells us how hard a positive charge is pushed between two different points.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Control Angle via Button Pushes' - cora


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Control Angle via Button Pushes

One button increases angle.

Other decreasesangle.Both light LED.


Servo Control Using Analog Signal

Obtain “analog” input

using analogRead().


Voltage, V

  • Voltage tells us how hard a positive charge ispushedbetween two different points.

  • Something, such as a battery, is needed to createa voltage.

Current, I

  • Current tells us the amount of chargeflowing throughsomething (similar to gallons per minute).

  • Current must have a path through which to flow.

I = V / R

Resistor:

R

V = 5, R = 5, I = ?







What Is the Measure Voltage?

5V

4V

3V

2V

1V

0V


Potentiometer

  • Voltage at wiper depends onposition along the resistor.

  • Voltage varies between ground(0V) and the supplied voltage(5V in this case).

  • Voltage various continuously(analog “signal”).

WIPER


Conversion of Analog to Digital

  • Obtain “analog” input using analogRead().

  • analogRead()returns a value between 0 (if pin at ground) and 1023 (if pin at 3.3 V).

  • Argument of analogRead()is the pin to read(only pins labeled ANALOGIN can be used).

  • Servo position varies between 0 and 180.Therefore, must divide analogRead()whatreturns by 5.68333 (1023 / 5.68333 = 180).


Control Angle via Button Pushes

One button increases angle.

Other decreasesangle.Both light LED.


ad