Recall & Review
beginner
What is an ADC and why is it needed for reading analog sensors on a Raspberry Pi?
An ADC (Analog-to-Digital Converter) changes analog signals (like voltage from a sensor) into digital numbers the Raspberry Pi can understand, because the Pi itself only reads digital signals.
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beginner
Name a common ADC chip used with Raspberry Pi for reading analog sensors.
The MCP3008 is a popular 10-bit ADC chip used with Raspberry Pi to read analog sensors.
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intermediate
How does SPI communication relate to reading analog sensors with an ADC on Raspberry Pi?
SPI (Serial Peripheral Interface) is a fast way the Raspberry Pi talks to the ADC chip to get digital values from analog sensors.
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beginner
What Python library is commonly used to interface with MCP3008 ADC on Raspberry Pi?
The 'gpiozero' library provides easy functions to read analog values from MCP3008 on Raspberry Pi.
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beginner
Why do you need to connect the sensor output to the ADC input pin and not directly to the Raspberry Pi GPIO?
Because Raspberry Pi GPIO pins only read digital signals (on/off), connecting an analog sensor directly won't work. The ADC converts the sensor's varying voltage into a digital number the Pi can read.
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What does ADC stand for in the context of Raspberry Pi sensor reading?
✗ Incorrect
ADC means Analog-to-Digital Converter, which changes analog signals into digital numbers.
Which communication protocol is commonly used between Raspberry Pi and MCP3008 ADC?
✗ Incorrect
SPI is the protocol used to communicate with MCP3008 ADC for fast data transfer.
Why can't Raspberry Pi GPIO pins read analog sensor values directly?
✗ Incorrect
GPIO pins read only digital signals, so analog voltages need conversion first.
What is the resolution of the MCP3008 ADC chip?
✗ Incorrect
MCP3008 provides 10-bit resolution, meaning it converts analog input into one of 1024 digital values.
Which Python library simplifies reading analog sensors via MCP3008 on Raspberry Pi?
✗ Incorrect
gpiozero provides easy-to-use classes for MCP3008 and other hardware on Raspberry Pi.
Explain how you would connect and read an analog sensor using an MCP3008 ADC with a Raspberry Pi.
Think about wiring, communication, and code steps.
You got /4 concepts.
Why is an ADC necessary for reading analog sensors on a Raspberry Pi, and how does it work?
Focus on the difference between analog and digital signals.
You got /4 concepts.