This video features the unboxing, assembly, and testing of a low-cost LED lamp kit sourced from AliExpress. The presenter focuses on the unique "filament LEDs" – essentially blue LEDs with a phosphor coating for white light – and guides viewers through the soldering process for both surface-mount and through-hole components, including an IC and a transistor. The video highlights the successful implementation of the lamp's touch-controlled power and brightness adjustment features, interspersing the technical build with personal anecdotes from a recent vacation.
Assembling a Chinese Touch-Controlled LED Lamp Kit
0:00 Introduction to a "Chinese Kit": The video begins by introducing a new project: a budget-friendly LED lamp kit from AliExpress featuring "filament LEDs." These LEDs consist of blue chips on a board, coated with phosphor to emit white light.
0:50 Core Components & Functionality: The kit includes a main IC (likely for control) and a transistor to drive the LEDs. A schematic found online confirms touch-based on/off control and Pulse Width Modulation (PWM) for brightness adjustment, operating at 5 volts.
2:17 Assembly – Surface Mount Devices: The assembly process starts with soldering surface-mount components, demonstrating a technique for attaching the IC using a soldering iron by first tacking down one pin.
5:01 LED Polarity & Installation: The presenter performs a quick test to determine the polarity of the filament LEDs (short end is positive) to ensure correct installation onto the PCB.
8:02 Remaining Components: The transistor, various capacitors, and resistors are then systematically soldered onto the board.
11:19 Personal Travel Stories: During the soldering, the presenter shares engaging stories from a recent vacation, including visits to national landmarks like Mount Rushmore, Yellowstone, and Grand Tetons, as well as encounters with wildlife and details about travel experiences.
18:00 Testing the Assembled Lamp: After completing the assembly, the lamp is powered up with 5 volts. The touch control successfully activates the LEDs, allows for dimming by holding the touch, and retains the last brightness setting when turned off and on.
19:10 Project Conclusion: The assembly is declared a success, and the kit's model number, CMTG-1, is mentioned.