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Clear acrylic DIY Bluetooth FM radio speaker kit with dual 3W speakers, 12 LED lights, digital display, remote control, weighs .395 kg

GeekLJT LDSR-3AS DIY Bluetooth FM Radio Speaker Soldering Kit

SKU CH-V1WG-9AZRK

A DIY soldering kit that builds a Bluetooth-compatible stereo amplifier and FM radio with 12 colour-changing LEDs, digital display and remote control

  • Wireless FrequencyFM
  • Battery Timefalse
  • Weight0.395 kilograms
  • Dual-channel Bluetooth amplifier with clear 3 W stereo sound
  • Portable FM radio covering 87.5 MHz to 108 MHz with auto-scan memory
  • Five playback modes plus remote and on-board controls
  • 12 colour LEDs pulse to the music for visual feedback
  • Light 0.395 kg acrylic build suited for education and hobbyists

DIY Soldering Kit for Education

This GeekLJT LDSR-3AS kit lets you build a dual-channel Bluetooth-compatible amplifier and FM radio. It is designed for students, hobbyists and educators who want hands-on electronics practice. The finished unit weighs 0.395 kilograms and includes a clear acrylic housing with integrated speakers. Assembly teaches soldering technique and basic circuit principles through a functional audio project.

Upgrade from Pre-Built Speakers

Unlike a sealed consumer speaker, this kit exposes every connection so you learn signal flow and component placement. The jump is worth it when the goal is understanding amplifier topology rather than just playing music. You gain a working stereo system with 2×3 W output, digital display and remote control after completing the build. It replaces passive learning with a tangible, operating device.

Sustained Operation Behaviour

The amplifier drives two 3 W speakers continuously while the 12 LEDs animate to the audio signal. The FM tuner holds stations from 87.5 MHz to 108 MHz with power-off memory so the last frequency returns on restart. Five selectable modes — FM, AUX, Bluetooth, USB, TF — run from the same board without switching hardware. The acrylic enclosure dissipates heat during extended listening sessions.

Highlights

  • Dual-channel Bluetooth amplifier with clear 3 W stereo sound
  • Portable FM radio covering 87.5 MHz to 108 MHz with auto-scan memory
  • Five playback modes plus remote and on-board controls
  • 12 colour LEDs pulse to the music for visual feedback
  • Light 0.395 kg acrylic build suited for education and hobbyists

Specifications

BrandGeekLJT
Part NumberLDSR-3AS
Wireless FrequencyFM
Battery Timefalse
Weight0.395 kilograms

Questions about this item

What size enclosure or panel cut-out does the finished acrylic housing need?

The completed kit measures 0.395 kg and uses a clear acrylic housing that holds the dual 3 W speakers, LED array and display; no separate mounting hardware is included so the housing itself is the finished enclosure.

Which soldering steps are most often missed when assembling the Bluetooth and FM board?

Install the FM tuner IC and the Bluetooth module first, then add the 12 surface-mount LEDs and the digital display before fitting the through-hole buttons, potentiometer and power jack; skipping the LED orientation check is the common error.

Which consumable parts will need replacement after extended use?

The 12 colour LEDs, the two 3 W speaker drivers and the lithium-ion cell inside the power bank module are the only items that degrade with time; all other components are soldered directly to the PCB.

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