Freenove Ultimate Starter Kit User Manual

Chapter 8 Potentiometer & LED
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def analogRead(chn):
value = bus.read_byte_data(address,cmd+chn)
r eturn value
def analogWrite(value):
bus. write_byte_data(address,cmd,value)
def setup():
g lobal p
GPIO. setmode(GPIO.BOARD)
GPIO. setup(ledPin,GPIO.OUT)
GPIO. output(ledPin,GPIO.LOW)
p = GPIO. PWM(ledPin,1000)
p. start(0)
def loop():
w hile Tr ue:
value = analogRead(0) #read A0 pin
p. ChangeDutyCycle(value*100/255) #Convert ADC value to duty cycle of PWM
voltage = value / 255.0 * 3.3 #calculate voltage
print ('ADC Value : %d, Voltage : %.2f'%(value,voltage))
time.sleep(0.01)
def destroy():
bus. close()
GPIO. cleanup()
if __name__ == '__main__':
p rint ('Program is starting ... ')
setup()
try:
loop()
e xcept KeyboardInterrupt:
destroy()
In the code, read ADC value of potentiometers and map it to duty cycle of PWM to control LED brightness.

Freenove Ultimate Starter Kit Specifications

General

Brand	Freenove
Model	Ultimate Starter Kit
Category	Single board computers
Language	English