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from time import sleep
import nxt.locator
from nxt.sensor.hitechnic import SuperPro
"""
Experiment 4, adapted from the SuperPro demo
For this demo, attach a photo-resistor between A0 and 3V and a 4.7kOhm resistor between
GND and A0.
Note: In testing I used a 10kOhm since I don't have 4.7kOhm handy.
It measures brightness and prints to the console. The brighter it is, the higher the
voltage.
In my testing, a phone flashlight puts it to 3.2V and putting my hand over it results in
0.1V, with natural light levels in my workspace being around 1.9-2.0V
"""
# Find NXT, configure sensor
with nxt.locator.find() as brick:
pro = SuperPro(brick, nxt.sensor.Port.S1)
while True:
try:
# Get brightness (measured in volts)
analog_value = pro.get_analog_volts()["a0"]
print(f"Analog 0: {analog_value}V")
# Sleep 0.1s to allow console to be read.
sleep(0.1)
except KeyboardInterrupt:
break
# When program stopped, turn off outputs
pro.set_digital_byte(0x00)
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