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Lesson 8 of 10 · Maker · 10 min

Distance sensor

Measure how far away things are with an ultrasonic sensor.

🔌 Wiring

The ultrasonic sensor always uses i3 and i4. Put an LED on o1.

Add import ultrasonic. Then distance() gives you the distance in centimetres.

TinkerPy
import ultrasonic

setup:

loop:
    if distance() < 20:
        o1 = pwm(100)
    else:
        o1 = 0
A parking sensor: the LED lights up when something is closer than 20 cm.
🚀 Your turn

Add a buzzer on o2 that beeps when something is closer than 10 cm.