09/04/2026
LED ko sirf long leg se check karna enough nahi hota 😳
👉 Is LED mein ek hidden mark hota hai
jisse aap polarity easily identify kar sakte ho
✔ Flat side = Negative (Cathode)
⚠️ Lekin dhyaan rahe — har LED mein ye feature nahi hota
👉 Baaki 4 methods aur real engineering logic ke liye
Full video zarur dekhein (link description mein hai) 🔥