Project Hub /Basic Analog & Power Electronics/Power Supplies & Voltage Regulators/Desktop LED Lamp Module

Intermediate

ANALOG / DISCRETE

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Desktop LED Lamp Module

A custom desktop LED lamp module featuring touch dimming, linear flicker-free brightness control, and integrated Li-ion battery power with charging capabilities.

Originally published on Hackaday.io

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

LM2596 Step Down DC-DC Buck Converter Rs. 99.00
1200mAh 18650 Li-ion Bat – Reliable 3.7V Power Cell Rs. 129.00
10pcs 5mm RED Diffused Light Emitting Diodes - LEDs Set Rs. 39.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Passive Components (generic)
Microcontroller IC (DIP) / Chip
Custom PCB / PCB Fab
resistive dividers

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How It Works

The Desktop LED Lamp Module is an analog and power electronics project designed to provide reliable, portable, and adjustable illumination. At the heart of the system is a Lithium-ion battery, which serves as the portable power source. Because Li-ion battery voltage fluctuates as it discharges, the circuit incorporates a TPS63000 buck-boost converter. This specialized regulator steps up or steps down the varying battery voltage to maintain a stable, constant supply voltage for the rest of the circuit. User interaction is handled by the SGL8022W touch control IC, which detects human touch on a conductive pad to toggle power and adjust brightness. The brightness control is achieved using passive components like resistors and capacitors configured for a linear current sink and resistive dividers, ensuring smooth, flicker-free dimming of the powerful LED load without relying on complex microcontrollers or digital code.

Why Build This

Create a custom, portable desktop task lamp for studying or working without being tethered to a wall outlet.

Learn how to integrate rechargeable Li-ion power systems with voltage regulation and modern touch-control interfaces.

Build a practical, battery-backed illumination system for nighttime use or emergency backup lighting.

Real-World Application

Custom desktop task lighting, portable night lamps, and battery-backed illumination systems.

Skills You'll Learn

Buck-boost power regulation

touch-sensing IC integration

linear current sinking

passive component biasing

custom PCB layout for power electronics

Safety Precautions

Ensure correct polarity when connecting Li-ion batteries and LED loads. Use appropriate charging currents suitable for the battery capacity to prevent overheating.

Technology Tags

LED LAMP

TOUCH DIMMING

SGL8022W

TPS63000

LI-ION BATTERY

LINEAR CURRENT SINK

BUCK-BOOST CONVERTER

Frequently Asked Questions

Do I need to write any software or code for the touch dimming?

No software is required. The touch functionality and dimming are handled entirely by the dedicated SGL8022W hardware IC and analog passive components.

Why is a buck-boost converter necessary for this lamp?

A Li-ion battery's voltage drops as it drains. The TPS63000 buck-boost converter ensures a stable output voltage is delivered to the LED circuit regardless of whether the battery is fully charged or nearly depleted.

Can I use any standard LED with this module?

You should use a powerful LED compatible with the current-sink design and voltage limits of the circuit, ensuring proper heat dissipation and correct electrical polarity.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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