7th grade technology assessment topic A.

If the Arduino board only has one 5-volt pin, what should I do to connect multiple items to this port?

Choose the correct answer below or the one that resolves this situation most simply.

• I connect a cable to the 5-volt pin and then solder as many wires as needed.

• I take the voltage from the 5-volt pin with a cable, then connect it to the row of the breadboard that has the red line, and to this row, I connect all the devices I need.

• I should use multiple Arduino boards, as many as I need 5-volt pins.

• You could get the same voltage from other pins on the Arduino board.

What is this year's project about?

• Manufacture devices programmed through Arduino to be able to transport ourselves to other places.

• Journey to Mars: design of a spaceship.

• Solve the problem of global warming by building devices programmed with Arduino.

• Create cars controlled via Bluetooth.

In an LED light-emitting diode, which leg must be connected to the positive pole for it to light up?

• I must connect the longest leg to the positive pole.

• I must connect the shorter leg to the positive pole.

• No matter which one you connect to positive, the LED will always light up.

• The leg called cathode is the one that must be connected to the positive pole.

What is the problem with this circuit?

Choose the correct answer below:

• The LED is connected the other way around.

• The cables were not connected to the Arduino board correctly.

• In the circuit, a resistor was missing to connect in series, so that the LED would not have exploded.

• The circuit was missing a resistor connected in parallel, so that the LED would not have exploded.

Write in the space below what is missing in the circuit for it to work correctly:

(a)  

Choose all circuits below that have mistakes:

• 
• 
• 
• 
• 

What is the purpose of this device in our project?

• This is an LED strip, so it allows us to turn several LEDs on and off depending on their measurement.

• This is a display, so it allows us to see the results of your measurement on a screen.

• This is a gas sensor, so it lets us know if there is any gas other than oxygen in the environment.

• It is a sensor with a photoresistor, so its resistive value changes with the amount of ambient light, allowing us to know if there is a lot of light or darkness.

Choose all the correct ways below to connect each pin to the Arduino board.

• Connect the VCC pin to the pin on the Arduino board that says 5 volts.

• Connect the leg that has the ground symbol to the pin on the Arduino board that says GND.

• Connect the leg that has D0 written on it to one of the digital pins on the Arduino board.

• Connect the leg that has D0 written on it to one of the analog pins on the Arduino board.

What is the purpose of this device in our project?

• This is an LED strip, so it allows us to turn several LEDs on and off depending on their measurement.

• This is an LCD, so it shows us on its screen the measurement results of other devices.

• This is a gas sensor, so it lets us know if there is any gas other than oxygen in the environment.

• It is a sensor with a photoresistor, so its resistive value changes with the amount of ambient light, allowing us to know if there is a lot of light or darkness.

What is the purpose of this device in our project?

• This is an LED strip, so we can control the switching on and off of the LEDs it contains through the programming we make on the Arduino board.

• This is an LCD, so it shows us on its screen the measurement results of other devices.

• This is a gas sensor, so it lets us know if there is any gas other than oxygen in the environment.

• It is a sensor with a photoresistor, so its resistive value changes with the amount of ambient light, allowing us to know if there is a lot of light or darkness.