Lab 6

• What is the main advantage of wireless connections?

  No cables or wires needed
• Why should designers consider the cost of adding wireless communications?

  It increases the product's overall cost
• What method will be examined for sending wireless data between Arduinos?

  A low-cost method without WIFI or Bluetooth
• What frequency do the RF 433MHz transmitter/receiver modules operate at?

  433.92 MHz
• Why are RF 433MHz modules considered cheap?

  Manufactured in large quantities for toys
• What is the input voltage for the RF 433MHz receiver?

  5V
• What is the input voltage range for the RF 433MHz transmitter?

  3-12V
• How many connections does each RF module have?

  Three connections for the transmitter
• What is the purpose of the external antenna connection on the modules?

  To enhance the wireless communication range
• What are the methods of sending digital data over radio?

  • Frequency Shift Keying (FSK)
  • Phase Shift Keying (PSK)
  • Amplitude Shift Keying (ASK)
• What does Amplitude Shift Keying (ASK) modify in the carrier wave?

  The amplitude of the carrier wave
• What does a digital '1' do in ASK modulation?

  Drives the carrier to full strength
• What happens when a digital '0' is transmitted in ASK?

  Turns the carrier signal off
• What is a disadvantage of ASK modulation?

  Susceptible to interference and noise
• How can the reliability of ASK be improved?

  By using a powerful encoding library
• What is the effect of antenna design on RF module communication?

  Affects the communication range
• What is the maximum communication range with a proper antenna outdoors?

  Over 50 meters
• What type of wire is recommended for a simple antenna?

  22 or 24-gauge solid wire
• Why is the length of the antenna wire important?

  It should be a fraction of the wavelength
• What is the wavelength of the signal at 433MHz?

  $69.24 \text{ cm}$
• What is the formula to calculate wavelength?

  $\lambda =$$\frac{V}{f}$
• What is the quarter-wave antenna length for 433MHz?

  $17.31 \text{ cm}$
• What are the advantages and disadvantages of Amplitude Shift Keying (ASK)?

  Advantages:

  • Simple circuitry
  • Inexpensive to implement

  
  

  Disadvantages:

  • Susceptible to interference
  • Reliability decreases with noise
• What is the main focus of Lab 6 in the manual?

  Hand Gesture Control Robot
• Why is it important to consider the cost of adding wireless communications?

  It increases the product's overall cost
• What method will be examined for sending wireless data between Arduinos?

  A low-cost method without WIFI or Bluetooth
• What frequency do the RF 433MHz transmitter/receiver modules operate at?

  433.92 MHz
• Why are RF 433MHz modules considered cheap?

  They are manufactured in large quantities
• What is the input voltage for the RF 433MHz receiver?

  5V
• What is the input voltage range for the RF 433MHz transmitter?

  3-12V
• How many connections does each RF module have?

  Three connections
• What is Amplitude Shift Keying (ASK)?

  A method changing amplitude for data transmission
• What does a digital '1' do in ASK modulation?

  Drives the carrier to full strength
• What is a disadvantage of ASK modulation?

  It is susceptible to interference
• How does antenna design affect RF communication range?

  Proper design increases communication range
• What is the wavelength of the signal at 433MHz?

  69.24 cm
• What is the formula to calculate wavelength?

  $\lambda =$$\frac{V}{f}$
• What is the practical length of a quarter-wave antenna for 433MHz?

  About 17.31 cm
• What does the MPU6050 IMU integrate?

  A 3-Axis accelerometer and gyroscope
• What technology does the MPU6050 gyroscope use?

  MEMS technology and the Coriolis Effect