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for (value = 0; value <255; value = value + 1)
{
analogWrite (ledPin, value); // LED lights gradually light up
delay (5); // delay 5MS
}
for (value = 255; value> 0; value = value-1)
{
analogWrite (ledPin, value); // LED gradually goes out
delay (5); // delay 5MS
}}//**********************************************************
(6) Test Result
Upload test code successfully, LED gradually becomes brighter then
darker, like human breath, rather than light on and off immediately.
(7) Code Explanation
When we need to repeat some statements, we could use FOR
statement.
FOR statement format is shown below:
FOR cyclic sequence:
Round 1：1 → 2 → 3 → 4
80
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