DIY 3.7V to 26V DC Voltage Booster | Simple Step-Up Converter

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3.7V to 26V DC Voltage Booster Circuit

This DIY Voltage Booster is designed to efficiently step up a 3.7V lithium-ion battery to 26V DC output using simple electronic components. The circuit operates based on an inductor-driven boost conversion principle, ensuring high efficiency with minimal energy loss.

Key Components & Their Functions:

3.7V Lithium-Ion Cell – Provides the input power.

Inductor (20 turns of 19-gauge copper wire) – Stores and releases energy to step up the voltage.

TIP41C MOSFET (with heat sink) – Functions as a power switch to regulate energy transfer.

100Ω Resistor – Controls current flow and stabilizes switching operations.

16V, 3300µF Capacitor – Smooths and filters the output voltage, reducing fluctuations.

Diode – Prevents reverse current and ensures efficient power transfer.


Circuit Working Principle:

1. The inductor stores energy when the MOSFET is switched ON and releases it when switched OFF, boosting the output voltage.


2. The capacitor helps in smoothing the voltage and reducing ripple, providing a stable 26V DC output.


3. The diode ensures that current flows in the correct direction, preventing losses.


4. The MOSFET TIP41C, controlled by a resistor, regulates the switching process, maintaining efficiency.



Wiring & Connections:

Cell Positive (+) → Inductor Terminal 3

Cell Negative (-) → Capacitor Negative & MOSFET Emitter

Inductor Terminal 1 → MOSFET Collector & Diode Input

Diode Output & Capacitor Positive → Voltage Output (+)


Applications:

Power supply for LED drivers

Charging circuits for portable devices

Boosting voltage for microcontroller-based projects

DC motor applications


This compact voltage booster provides an efficient way to step up low voltage to a higher DC voltage with minimal energy loss. Let me know if you need further optimizations or circuit enhancements!

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