Digital vs analog, Arduino, and FPGA

You already saw what digital electronics is. Here it is compared with what first-year students usually mix up.

Key difference

Analog varies continuously (a voltage “almost 3.7 V”). Digital uses intervals: one range is 0 and another is 1. Arduino and FPGA use digital logic; they do not replace learning gates and tables.

Platform	Role	Strength	Limit
Digital electronics	Design circuits with 0 and 1, algebra, and tables	Precision, noise immunity, easy to copy and synthesize	Does not model “soft” sensors without an ADC
Analog	Amplify and filter continuous signals	Audio, radio, sensor conditioning	Drift, noise, and no “truth table”
Arduino	Microcontroller + IDE for prototypes	Fast for an LED or a sensor	Does not teach extracting a function from a circuit or Karnaugh
FPGA	Reconfigurable hardware (HDL)	Parallelism and chip prototyping	Makes sense after combinational and sequential logic

How to say it in an exam

“Arduino is a small computer that runs a program. An AND/OR network is the program, in silicon. An FPGA describes that network in VHDL; first you must know which network you want.”

Next step

Follow the study path and open unit 1 — number systems.