[Solved] You want to read multiple analog sensors connected to MCP3008 channels 0, 1, and 2 and print their voltages in... Which code snippet correctly converts ADC values to voltage assuming 3.3V reference? | Raspberry Pi

Raspberry Pi - SPI Communication

You want to read multiple analog sensors connected to MCP3008 channels 0, 1, and 2 and print their voltages in volts. Which code snippet correctly converts ADC values to voltage assuming 3.3V reference?

Avoltage = (adc_value * 1023) / 3.3

Bvoltage = adc_value / 3.3

Cvoltage = (3.3 / adc_value) * 1023

Dvoltage = (adc_value / 1023) * 3.3

Step-by-Step Solution

Solution:

Step 1: Understand ADC to voltage conversion formula
Voltage = (ADC reading / max ADC value) * reference voltage. Max ADC value for MCP3008 is 1023.
Step 2: Apply formula to convert ADC values
Using voltage = (adc_value / 1023) * 3.3 correctly converts raw ADC to voltage.
Final Answer:
voltage = (adc_value / 1023) * 3.3 -> Option D
Quick Check:
Voltage conversion = (ADC / 1023) * Vref [OK]

Quick Trick: Divide ADC by 1023, then multiply by 3.3V to get voltage [OK]

Common Mistakes:

MISTAKES

Multiplying ADC by 1023 instead of dividing
Dividing by voltage instead of multiplying
Ignoring max ADC value 1023

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Which code snippet correctly converts ADC values to voltage assuming 3.3V reference?

Step 1: Understand ADC to voltage conversion formula

Step 2: Apply formula to convert ADC values

Final Answer:

Quick Check:

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