Ajay Unofficial

10/02/2026

3-TRANSISTOR AUDIO POWER AMPLIFIER CIRCUIT DIAGRAM
9V PUSH-PULL AMPLIFIER TO DRIVE 8 OHM LOUDSPEAKER

10/02/2026

3.7V DISCO LIGHT CIRCUIT DIAGRAM
MUSIC REACTIVE DISCO WITH 1 SPEAKER & 2 FLASHING LED BULBS

10/01/2026

🔋💡 3.7V BATTERY TO 1 LED — SIMPLE CIRCUIT! ⚡

Looking for a simple beginner-friendly electronics project? This tiny circuit shows how a 3.7V rechargeable battery can power a single LED with just a few components. 🔧

🔋 3.7V Li-ion Battery
➡️ 100–220Ω Resistor
➡️ LED
➡️ Battery Negative

The resistor is important because it helps limit the current flowing through the LED, protecting the LED from excessive current. 💡

⚙️ Basic connection:
Battery + → Resistor → LED (+) → LED (−) → Battery −

It’s a great little circuit for learning the basics of voltage, current limiting, polarity, and LED operation.

⚠️ Safety tip: A 3.7V Li-ion battery can reach about 4.2V when fully charged, so always use a suitable resistor and handle lithium-ion batteries carefully. Never short-circuit or improperly charge the cell.

💾 SAVE this diagram for your next electronics project!
❤️ Like | 💬 Comment | 🔄 Share

10/01/2026

🔋⚡ SIMPLE POWER BANK CIRCUIT DIAGRAM! ⚡🔋

Ever wondered how a power bank stores energy and turns it into useful USB power? 🔌📱

This simple circuit diagram shows the basic idea behind a rechargeable power bank:

🔋 Li-ion Battery — stores the electrical energy
⚡ Charging Circuit — safely charges the battery
🔄 Boost Converter — increases the battery voltage to the required USB output
🔌 USB Output — delivers power to your phone or other small devices
💡 Protection Circuit — helps protect the battery from overcharging, over-discharging, and short circuits

The basic power flow is:

USB 5V → Charging Module → Li-ion Battery → Boost Converter → 5V USB Output

A compact circuit like this demonstrates an important electronics principle: different circuit stages work together to store, regulate, and deliver electrical energy. 🔧⚙️

⚠️ Safety reminder: Lithium-ion batteries can be dangerous if incorrectly charged, short-circuited, damaged, or connected without proper protection. Always use a suitable charging and protection module for the battery you are using.

📐 Save this diagram for your electronics projects!
🔧 Like • 💬 Comment • 📲 Share with someone who loves electronics!

09/29/2026

09/29/2026

PLASMA ARC LIGHTER CIRCUIT DIAGRAM
A RECHARGEABLE 18650 LIGHTER WITH A GLOWING ELECTRIC ARC

09/29/2026

SOLAR-CHARGED POWER BANK
CIRCUIT DIAGRAM
CHARGE 18650 CELLS FROM THE SUN AND POWER YOUR PHONE ANYWHERE

Pro tip: Use the first 5 as your core - - Instagram pushes those hardest.

09/29/2026

IP5306 ALL-IN-ONE POWER BANK CIRCUIT DIAGRAM
CHARGE, BOOST AND MONITOR ON ONE TINY BOARD