Reading Schematics
A schematic shows how components and signals are electrically connected. An embedded engineer should be able to trace a signal from a connector or sensor through protection and conditioning into an MCU pin.
CORE IDEA
Identify power and ground first
ENGINEERING VIEW
Trace signal names across pages
WHAT TO CHECK
Check pull resistors and protection
REMEMBER
Confirm MCU pin multiplexing against the schematic
Engineer’s checklist
- Identify power and ground first
- Trace signal names across pages
- Check pull resistors and protection
- Confirm MCU pin multiplexing against the schematic
KEY TAKEAWAY
Digital behavior is physical behavior. When firmware and expectations disagree, measure the signal instead of guessing.