1. A little “bit” of Binary Math

2. Binary Digit = “bit”
Digital “1” = +5 V = high (H)
Digital “0” = 0 V = low (L)

3. Binary representation
How many numbers can you represent with 1 bit?
With 2 bits?
With 3 bits?
With N?
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4. How do you write the number 45 in binary?
 = 1 × 25 + 0 × 24 + 1 × 23 + 1 × 22 + 0 × 21 + 1 × 20 = = 4510
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5. And now, your joke of the day…
There are only 10 types of people in the world. Those who understand binary, and those who don’t.

6. Analog-to-Digital Converter (ADC)
ADC resolution
Resolution = 5V/4 levels = 1.25 V/levels
1.25V/LSB
Resolution = 5V/8 levels = V/level
= 0.625V/LSB
LSB = least significant bit
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7. Arduino Uno 10-bit ADC 5V logic level ADC resolution = ?
Higher-end electronics offers 16-bit ADC. What’s the resolution?
What about 24 bit ADC? (super high end system!)

8. Successive Approximation Register
1 step at a time
Electronics inside
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