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 Analog I/O

int analogRead(pin) pin 0~5.

analogWrite(pin, value) pin 3, 5, 6, 9, 10, 11, value is 0 to 255

Time

delay(ms)Pauses the program for the amount of time (in miliseconds) specified as parameter.

(There are 1000 milliseconds in a second.)(unit ms).

delayMicroseconds(us)

Math

min(x, y) minimum value

max(x, y) maximum value

abs(x) absolute value

constrain(x, a, b) Constraint function, lower limit a upper limit b, x must be between a & b to be

returned

map(value, fromLow, fromHigh, toLow, toHigh)

pow(base, exponent) extraction of square root

sq(x) square

sqrt(x) Square root