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# Control Angle via Button Pushes - PowerPoint PPT Presentation

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.

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

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Presentation Transcript

One button increases angle.

Other decreasesangle.Both light LED.

Obtain “analog” input

• 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 = ?

5V

4V

3V

2V

1V

0V

• 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

• Obtain “analog” input using analogRead().

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