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灵爱新觉罗 — Mon, 12 Oct 2026 21:44:50 +0000

💥 Essential for electronic novices | LED is not an ordinary small bulb! comics
Who knows! I always thought LEDs were just little light bulbs 😵‍💫
It turns out that he is a semiconductor giant!
🟡Figure 1 | Unlock the diode family
Light-emitting LED | Electric energy → Light energy✨
UV UV LED | Nail Curing | Sterilization and Disinfection 🦠
Ordinary diode | Unidirectional conduction
Positive energization turns on the light. Negative energization directly shuts it down!
Lighting, screens, and medical devices are everywhere!
🔵 Figure 2 | The Mystery of LED Luminescence + Wiring Lightning Protection
Glowing is not magic! Electronic transitions release photons ⚡
3 quick tips to distinguish positive and negative poles 👇
✅ Long leg = positive pole | Short leg = negative pole
✅ The flat side of the shell = negative electrode
✅ Connect the internal small electrode to the positive pole
⚠️ Control the voltage and current, otherwise the components will be burned directly!
🔷Figure 3 | PN junction bottom layer dry goods
P-type and N-type form a PN junction
Electrons + holes collide and release energy 🔥
Three major functions of diodes:
Unidirectional conduction | Low power consumption | Ultra-fast response
Mobile phones, street lights, and car headlights are all in use!
Friendly comic for beginners with no foundation✅Introduction to circuits
💬 Ask: Have you ever fallen into the trap of connecting LEDs in reverse while doing experiments?

Electronic Science Popularization #LED (Light Emitting Diode) #Electronic Components #Introduction to Circuitry

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灵爱新觉罗 — Mon, 12 Oct 2026 21:41:00 +0000

💥A must-see for those starting in electronic hardware! Here comes valuable information to avoid pitfalls with 3 major components!
Who hasn't fallen into a pitfall when they first started playing with circuits? 😭
Connecting diodes in reverse will not work, using fuses incorrectly can burn the board, and connecting relays without diodes can directly damage the microcontroller
The pitfalls we've fallen into and the lessons we've learned, I'll explain them all to you today in one go! Newbies, hurry up and bookmark it! 👇
⚠️Part1 | Diode - The Stubborn One-Way Gate in Circuits✨
The little guy, the diode, has a temper! It only allows current to flow in one direction!
When powered in the correct direction, it conducts smoothly; when reversed, it immediately shuts down and remains idle!
Let's take a look at the diode family, each with its own unique skill:
✅ Ordinary diode: It conducts electricity in one direction faithfully, a basic player in circuits
✅ Light-emitting diode (LED): our old friend, relied on for indicator lights and colored lights
✅ Zener diode: The master of circuit voltage stabilization, preventing voltage spikes
✅ Rectifier diode: It converts alternating current (AC) into direct current (DC) and acts as a power supply within the system
✅ Detection diode: Specialized in extracting signals, a good partner for RF circuits
✅ Photodiode: A light-sensitive component that changes its conduction state upon exposure to light
📌 A little science popularization: Whether it's surface mount or direct insertion, the core is a PN semiconductor!
👉 For beginners, it's better to start with straight-pin models. The pins are thick, making soldering less prone to failure!
👉For batch electronic product assembly, opt for surface mount technology, which is compact and space-saving.
🚨Diode lightning protection warning!
Don't weld without distinguishing the positive and negative poles!!
Forward conduction ✅, reverse cut-off ❌
If you get the positive and negative mixed up, it will just give up and not work. Don't waste your time!
🔍Part2 | Fuse | The Silent Guardian of Circuit Safety
🚨 Warning: Major scam alert!!
It is absolutely forbidden to use copper wire or iron wire as a substitute for a fuse❗❗
In the event of a short circuit or current overload, the fuse will instantly melt and cut off the circuit.
If copper wire is used instead, it won't break, but the end result will be the burning of components and circuits, and in severe cases, there may even be safety hazards!
When selecting, it's also important to ensure that the rated current and voltage match the circuit. It's not always the bigger the better!
⚡Part3 | Relay | The electromagnetic switch that can move mountains with a feather!
Newbies, beware! Never directly drive high-power loads like motors and light bulbs using a microcontroller's IO port!
At the very least, the chip will become hot, and at the worst, it will be directly scrapped on the spot 😭
Relays are designed to solve this problem! They can easily control high-current loads with a tiny low current!
📌 The biggest pitfall of hitting the blackboard!
At the moment of de-energization of the relay coil, a huge high-voltage counter electromotive force will be generated!
Forgetting to connect the parallel freewheeling diode, the high voltage directly broke down the main control chip!
When working on a relay project, one must not be lazy and omit the freewheeling diode!
💡Last words✨
These seemingly small three components hide a wealth of circuit logic!
The diode teaches us to abide by rules, allowing only one-way traffic;
Fuses teach us responsibility and sacrifice in critical moments;
Relays teach us to leverage external forces and control the overall situation with minimal effort.
Getting started with electronics is not as difficult as you might think. By understanding the basic components and avoiding common pitfalls for beginners, you too can master hardware!
👉 Let's talk about what components you burned out when you first started! Share your woes in the comment section!

Electronic popular science #Microcontroller #Hardware DIY #Electrical knowledge #Electronic enthusiasts #Embedded entry #Learning electronics from scratch #Circuit knowledge

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灵爱新觉罗 — Mon, 12 Oct 2026 21:21:50 +0000

💥Don't be silly! Just connect the LED directly to the power supply, and it will die on the spot for you to see!
Who hasn't soldered a few LEDs when working on hardware or microcontrollers? 😭
Today, let's speak in plain English! Understanding these three pictures can help you save a lot of money on components that you might otherwise have bought unnecessarily! 👇
⚠️ Part 1: LED Supergroup, Different Colors, Different Capabilities!
Don't buy LEDs blindly anymore! Different colors have vastly different uses:
🔴 Red: Low voltage, functioning as an indicator light
🟠 Orange: Warm and eye-catching, suitable for prompts
🟡 Yellow: Dazzlingly bright, perfect for use as a traffic signal
🟢 Green: The most sensitive to human eyes, used for status display
🔵 Blue: Short wavelength, a common choice for displays and backlighting
🟣 Ultraviolet (UV): High energy, used for curing detection
🔍 Part 2: Component selection, through-hole or surface-mount?
Upon dismantling it to inspect the interior, it's actually just a chip, pins, and a shell!
📌 Surface-Mounted Device (SMD): Small in size, densely packed, and covering the entire backlight of mobile phone screens!
📌 Direct In-Line Package (DIP): Thick pins, user-friendly for those with poor operation skills, a must-have for experimentation and marathon running!
🚨 Part 3: Help! Little Secrets of LED Current Limiting (Guide to Preventing Explosions)
Here's the key point! Never connect an LED directly to a 5V power supply!
Once it is turned on, the current will surge instantly. Without adding a resistor, it will definitely emit smoke! 💨
Adding a current-limiting resistor is to limit the current and protect its vitality!

ELECTRICITY

灵爱新觉罗 — Mon, 12 Oct 2026 21:18:32 +0000

THE

灵爱新觉罗 — Sun, 11 Oct 2026 20:56:09 +0000

✨ The first door to the electronic world is surprisingly this small component! ✨
Did you know? In the mobile phones and computers we use every day, there is a "one-way door" hidden - that is, the diode!
💡 Its superpower: The "Bachelor" of Electricity
The core skill of a diode is to allow current to flow in only one direction (forward conduction), while blocking it in the opposite direction (reverse cutoff). This "unidirectional conduction" characteristic relies entirely on its internal PN junction structure. Isn't it amazing?
👨‍👩‍👧‍👦 The diode family, each one a treasure
This family has more than one member:
Rectifier: It is a "converter" that can convert alternating current (AC) into direct current (DC).
Voltage regulator: Like a "rudder stabilizer", it can stabilize the voltage in the circuit, preventing it from fluctuating.
LED: The most familiar "light-emitting expert" to us, it converts electrical energy into light energy, and is found in everything from mobile phone screens to household lights, and even ultraviolet LEDs capable of sterilization.
🔑 Understand it and unlock a new world of electronics
Don't underestimate the diode just because it's small. It's the "unsung hero" in electronic devices. Understanding its working principle is like holding the first key to unlock the electronic world. Looking at those complex circuits, doesn't it feel less difficult now?

DEV Community: 灵 爱新觉罗

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Electronic Science Popularization #LED (Light Emitting Diode) #Electronic Components #Introduction to Circuitry

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Electronic popular science #Microcontroller #Hardware DIY #Electrical knowledge #Electronic enthusiasts #Embedded entry #Learning electronics from scratch #Circuit knowledge

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ELECTRICITY

THE

DEV Community: 灵爱新觉罗