Sweep from 0 to 180
Move the arm smoothly across its range.
Sweep from 0 to 180 is a free Arduino & IoT Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Arduino & IoT Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
What a Sweep Is
A sweep moves the servo smoothly across its whole range instead of jumping. It's the classic way to see your servo come alive. 🌊
Step by Step
The trick is to step the angle one degree at a time. Each tiny write() nudges the arm a little, and together they look like one smooth motion.
Loop the Angles
A for loop is perfect here. Count from 0 up to 180 and write each value as you go.
for (int a = 0; a <= 180; a++) {
myServo.write(a);
}Give It Time
Without a pause the loop finishes before the arm can move. A short delay() lets each step physically happen.
myServo.write(a);
delay(15);Delay Sets Speed
The delay value controls sweep speed. A bigger number makes a slow, graceful sweep; a smaller one makes it whip across quickly.
Now Come Back
To sweep back, run a second loop that counts down from 180 to 0. Together the two loops make a full there-and-back motion.
for (int a = 180; a >= 0; a--) {
myServo.write(a);
delay(15);
}Put It in loop()
Drop both for loops inside loop() and the servo sweeps back and forth forever, just like the Arduino Sweep example.
Mind the Limits
Stay within 0 to 180. Pushing a standard servo past its stops makes it buzz and strain, which wears out the gears.
Skip Steps to Hurry
Want a faster sweep without a tiny delay? Increase the step size by counting up by 5 instead of 1.
for (int a = 0; a <= 180; a += 5) {
myServo.write(a);
delay(20);
}Park in the Middle
Before doing real work, many projects center the servo at 90 degrees first. It's a tidy, known starting position.
myServo.write(90);Smooth vs Snappy
Sweeping is gentle on the gears, but sometimes you want a fast snap to a target. Pick smooth or snappy based on your project's feel.
Quick Check
Let's see why a sweep needs a pause between steps.
Recap
Step the angle in a for loop with a small delay, then loop back down. That up-and-down pattern is the full servo sweep. 🔁
Frequently asked questions
Is the “Sweep from 0 to 180” lesson free?
Yes — the full text of “Sweep from 0 to 180” is free to read here on the web, and the Arduino & IoT Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Arduino & IoT Academy course, upgrade to CoddyKit PRO.
What will I learn in “Sweep from 0 to 180”?
Move the arm smoothly across its range. You practise Arduino & IoT Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Arduino & IoT Academy?
No prior experience is required. Arduino & IoT Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Sweep from 0 to 180” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Arduino & IoT Academy lesson?
Yes. Every Arduino & IoT Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- How a Servo Knows Its Angle
- The Servo Library & attach
- Sweep from 0 to 180
- Knob-Controlled Servo