From Automation to Apps

So… funny story.

A while ago I was playing with PLCs. Yep. Industrial stuff. Sensors, relays, ladders, blinking lights. Very factory-core. At the time I didn’t think much of it — I was just trying to understand how machines think without exploding 💥 (spoiler: they’re very unforgiving).

Fast-forward to me learning React, sitting in front of my laptop at 2am, te cold, brain fried, staring at useState like it personally offended me.

And then… 💡 WAIT A SECOND.

This feels… familiar???

🏭 PLC brain activated

If you’ve ever touched PLC programming (ladder logic, function blocks, whatever flavor), you know the deal:

Inputs come in (buttons, sensors, signals)
Logic runs every cycle
Outputs change based on the current state
Everything is predictable, reactive, and stateful

Back then I didn’t call it “state”. I called it “why is this motor still ON???” 😭

But yeah, PLCs are basically:

Infinite loops that react to changes

Sound familiar yet?

⚛️ Enter React (aka “PLC but with JSX”)

When I first learned React, I was like:

“Why is my UI not updating?? Why is this state stale?? Why is everything re-rendering?? omg”

Classic beginner pain. Been there. Still there sometimes.

Then I realized something embarrassing:

React is just automation logic wearing a hoodie.

Hear me out 👇

🔁 PLC Scan Cycle = React Render Cycle

In PLCs:

Read inputs
Execute logic
Update outputs
Repeat forever ♾️

In React:

State/props change
Component re-renders
UI updates
Repeat forever ♾️

BRO.

Same movie. Different actors.

Except React yells at you if you mutate state and PLCs yell at you by breaking real machines 🫠

🧠 State is just memory (stop overthinking it)

In PLC land:

You store flags
You latch bits
You remember what happened last cycle

In React:

useState
useReducer
useRef (aka “pls don’t re-render” button)

Same idea. Different syntax. More memes.

Once I stopped treating React state like magic and started treating it like PLC memory, everything clicked.

Like:

A button click = digital input
setState = coil energizing
Conditional rendering = contacts opening/closing

I felt so smart for like 3 minutes 😂

🎮 Building an interactive story (because why not?)

So naturally, instead of just understanding this quietly like a normal person…

I built a tiny interactive thing.

An app where:

Inputs toggle state
Logic decides what happens next
UI reacts visually

Basically a PLC simulator disguised as a React app.

Was it overkill? Yes. Did it help me learn? BIG YES. Did I push it to GitHub at 3am with a messy commit message? Absolutely.

😵 My struggles (aka honesty time)

Let’s be real:

I broke stuff
I misunderstood hooks
I forgot dependencies in useEffect (don’t judge me)
I re-rendered the universe by accident

Multiple times.

But that’s kinda the point, right? I’m just a curious dev smashing concepts together and seeing what survives 🔥

🚀 Why this mindset helped me

Thinking in automation logic made React less scary.

Instead of:

“React is confusing”

It became:

“Oh, this is just reactive logic with prettier outputs”

And that mindset shift? Game changer.

If you come from:

PLCs
Arduino
Game dev
Even Excel formulas 😅

You already understand React more than you think.

💬 Final thoughts (before I overthink this)

If you’re learning React and feel stuck:

Build weird things
Compare it to stuff you already know
Don’t wait to “feel ready”

Just do it™️.

Worst case? You learn something. Best case? You accidentally connect factories to frontends and feel like a wizard 🧙‍♂️✨

Alright, I’ll stop here before this turns into a book. Thanks for reading, Now go break something and learn 💙