TECH - 6th Grade 2nd Term Exam

Why does the ultrasonic sensor have 2 "eyes" on it?

• So the ultrasonic waves can hit more objects

• So the bot can see differences in color

• One eye sends a wave and one receives it

• In case one eye stops working the other eye is a backup

What are the THREE types of connections that the Motor Driver has?

• Positive, negative, and GND

• To the Arduino, to the battery, and to the motors

• To the Arduino, to the ultrasonic sensor, and to the battery

• To the motors, to the battery, and to the ultrasonic sensor

What is the purpose of using a Motor Driver (H-Bridge) for our project?

• We are not going to use a Motor Driver for our project

• To only give energy to the motors

• To control and give energy to the Ultrasonic sensor

• To control and give energy to the motors

Suppose you're soldering a jumper to a motor, but all the soldering wire (estaño) is getting stuck to the soldering iron (cautín), and is not sticking to the motor or the jumper. What could be a reason for this?

• You didn't put Soldering Cream (crema para soldar) on the jumper or the motor

• The soldering iron (cautín) is not hot enough

• You can't solder jumpers to the motor

• The soldering wire (estaño) is broken/damaged.

Why do we have to use soldering wire (estaño) to solder electronic elements, instead of using Hot Glue (silicona)?

• Because we don't use tape for the electronic elements

• Because the soldering wire (estaño) can NOT conduct electricity, and the hot clue can.

• Because the soldering wire (estaño) can conduct electricity, and the hot clue can't.

• Because we can use a protoboard/breadboard.

Suppose you finish your Obstacle Avoiding car, but when testing it, you can see that the left wheel is not moving at all. ¿What could be one of the reasons for this?

• One of the jumpers connected to the Motor is loose or disconnected

• The programming in mBlock is not working correctly for the output connected to that motor

• Both reasons are possible.

• None of the reasons are possible.

For our Obstacle Avoiding car, Which are, IN ORDER, the components in charge of:

1. Controlling the motors

2. Giving energy to the Motor Driver and the motors

3. Detecting the obstacles in front of the robot

4. Making the wheels turn forward or backward

• 1. Geared motor

  2. Resistors

  3. Ultrasonic sensor

  4. Geared Motors

• 1. Arduino

  2. Arduino

  3. Arduino

  4. Geared Motors

• 1. Motor Driver

  2. Battery

  3. Ultrasonic sensor

  4. Geared Motors

• 1. Motor Driver

  2. Arduino

  3. Ultrasonic sensor

  4. Crazy Wheel

Why does every circuit need to have a positive and a negative connection?

• Because we need to give energy to the components

• Because they are positive and negative

• Because electrons need to have a starting point and an ending point in the circuit.

• Because the LEDs have a positive and a negative

Suppose we want to create a circuit that turns on one, two or three LEDs depending on the temperature of a room.

What electronic component should we use to measure (detect) the temperature?

• An ultrasonic sensor

• A temperature sensor

• An LED

• An Arduino board

True or false:

LEDs are connected to OUTPUTS of the Arduino board, since the arduino sends a signal to turn the LEDs on or off

• True

• False