Three words. Each with meaning. Understand each from home — the whole concept becomes obvious.

Geyser should turn ON only when ALL of these are true:

Teacher asks: "Is 23 greater than 24?" You compare two numbers and give one answer — yes or no. That is a comparator.

Three sections of an office floor:

You step into the shower. Too cold. You turn the hot water knob — a lot, because it is very cold. Water gets warmer. Slightly too warm now. You turn back — a little. Perfect.

Before a pilot takes off — they do not just push the throttle:

A Function Block Diagram (FBD) is a graphical programming language used in BMS to represent control logic through interconnected blocks, making complex sequences visual and easier to understand and debug. It is a standar

PID control is a feedback loop mechanism using Proportional, Integral, and Derivative components to maintain a process variable at a setpoint. AHUs often oscillate due to improper PID tuning, where gains are set too high