Digital and analog signals
25 min · BeginnerUnderstand the concept
Sensors communicate through voltage levels and digital buses such as I2C, SPI and UART. Correct electrical levels, pull-up requirements, grounding and bus timing matter. A software library alone does not guarantee signal compatibility.
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Your exercise
Write a protocol selection matrix for three fictional sensors and list voltage and timing checks needed before wiring.
Practice in simulation or at safe low voltage unless supervised by qualified personnel. Follow official equipment safety guidance.
Record your engineering notes
Capture a hypothesis, your observations, test evidence, failure cases or the next experiment. These notes stay in your browser unless you export them.
Knowledge check
What is essential before connecting two devices?
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