November 2011
Intermediate to advanced
392 pages
13h 3m
English
Content preview from Arduino Internals
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Beyond the Blinking LED: Starting Simply
Listing 8-1 illustrates perhaps the simplest possible Arduino sketch that actually does something useful.
Listing 8-1. Dimming a Single LED with a Single Arduino Statement
void setup() {
}
void loop() {
analogWrite(11, analogRead(0) >> 2);
}
For this sketch to work properly, you must attach a variable voltage to the first analog input, A0. This is easily accomplished using a potentiometer, whose endpoints are connected to VCC and ground and whose wiper contact (usually but not always the center pin) provides the variable voltage between the two potentials. A 10K linear potentiometer is perfect. Then connect D11 to D13 using a short jumper wire, so the PWM signal on D11 drives the LED that comes standard ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.