Robotics Week 9-10

What does an LDR measure?

• Voltage

• Current

• Resistance

• Light

What is the output of an LDR?

• Voltage

• Current

• Resistance

• Light

What is the output of a Photodiode?

• Voltage

• Current

• Resistance

• Light

A Phototransistor can be used in which modes?

(select all)

• Active

• Switch

• Triac

• Current

Which of these is similar to a solar cell?

• Photodiode

• Phototransistor

As it gets brighter, the Vout of a voltage divider LDR circuit will always:

• go up

• go down

• go up or down depending on the configuration

Ultrasonic sensors can only detect opaque objects

• True

• False

All proximity sensors covered in class send out some sort of wave and wait for it to come back

• True

• False

All ultrasonic sensors have 4 pins

• True

• False

Which of these proximity sensors has the longest range?

• Ultrasonic sensor

• IR proximity detector

• LiDAR