Diana, our TA, walked us through how to probe an input device to check its analog levels and digital signals. She started by breaking down the basics of analog and digital signals, explaining how they work in circuits and why they’re essential. She emphasized the importance of accurate measurements, showing us how to pick up on the subtle variations in analog signals versus the straightforward on-off nature of digital signals. Using a multimeter and oscilloscope, she demonstrated how to monitor voltage changes for analog readings, which can vary depending on the sensor output, and how to identify binary states for digital signals. The session was a fantastic introduction to understanding how input devices communicate with microcontrollers and how to interpret these signals, which is crucial for troubleshooting and circuit analysis.