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  • DIY KITS LM3915 10 LED Audio Level Indicator VU Meter Preamp Power Amplifier Indicate
DIY KITS LM3915 10 LED Audio Level Indicator VU Meter Preamp Power Amplifier Indicate

DIY KITS LM3915 10 LED Audio Level Indicator VU Meter Preamp Power Amplifier Indicate

$4.94-$5.90/ Piece|2 Piece/Pieces(Min. Order)

Customization:

Customized logo（Min.Order: 1000 pieces）
Customized packaging（Min.Order: 1000 pieces）
Graphic customization（Min.Order: 1000 pieces）
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DIY KITS LM3915 10 LED Audio Level Indicator VU Meter Preamp Power Amplifier Indicate

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Audio Level Indication & VU Meter: The LM3915 IC enables real-time audio level visualization via 10 LEDs, making it ideal for monitoring sound intensity in audio systems.
  • Preamp & Power Amplifier Integration: Supports signal amplification for both input and output, enhancing compatibility with speakers and audio devices.
  • Relay Control: The onboard relay facilitates switching of external devices or power loads, expanding functionality for automation projects.

Key features

  • 1. Material Technology

    • With an FR-4 PCB and surface-mount (SMD) components, you can build durable, compact circuits that save up to 40% space compared to through-hole designs*.

  • 2. Interactive Design

    • With the 10 LED array and built-in relay, you can simultaneously monitor audio levels in real-time and control external devices like lights or motors, offering dual functionality unmatched by basic LED bar graphs*.

  • 3. Performance Parameters

    • With the LM3915 IC, you can achieve precise audio level indication with a response speed up to 50kHz, outperforming simpler LED meters without integrated preamplifiers*.

  • 4. Scenario Solutions

    • With its modular design, you can adapt this kit for diverse applications like audio visualization, home automation, or educational projects, unlike single-purpose devices*.

  • 5. Certification Standards

    • Using standard electronic components compliant with common safety protocols, you can ensure foundational reliability while verifying specific certifications (e.g., RoHS) with the manufacturer*.

Product details

DIY KITS LM3915 10 LED Audio Level Indicator VU Meter Preamp Power Amplifier Indicate

The DIY KITS LM3915 is a versatile SMD-mounted circuit board designed for audio level indication applications, featuring a 10-LED VU meter, preamp, and power amplifier. Built with an FR-4 PCB and standard electronic components, this kit is ideal for DIY projects like audio visualization, automation systems, or educational electronics experiments. Its modular design allows customization to suit specific needs.

Technical specifications

FeatureSpecificationBenefit
IC ModelLM3915 10-LED Audio Level IndicatorPrecise audio signal visualization
Mounting TypeSurface-Mount Device (SMD)Compact design for space-constrained use
PCB MaterialFR-4 (Flame Retardant)Durable and heat-resistant construction
LED Array10 bi-color (red/green) LEDsClear visual feedback for audio levels
Relay Capability5V SPDT RelayControls external devices or power loads
ApplicationDIY audio projects, automation systemsFlexible for hobbyists and professionals

Customization guide

Adjustable parameters include:

  • LED Color/Quantity: Swap LEDs to match project aesthetics or increase/decrease count for different use cases.
  • Resistor Values: Modify resistors to calibrate sensitivity for specific audio input ranges.
  • Relay Specifications: Upgrade to higher-current relays for controlling heavier loads (e.g., motors).

Get inspired

Turn this kit into a dynamic VU meter for home audio systems, a traffic light controller for robotics projects, or an educational tool to teach electronics basics. The built-in relay enables seamless integration with external devices, while the SMD design ensures a sleek, professional finish.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
LED Count1015 (+50%)20 (+100%)
Input Voltage5V9V (+80%)12V (+140%)
Relay Current5A10A (+100%)20A (+300%)
CertificationsBasic ESDRoHS, CEUL, IP65

Supplier's note

  1. Technical Breakthroughs:

    • SMD Mounting: Enables compact designs, 20% smaller than through-hole alternatives.
    • FR-4 PCB: Withstands temperatures up to 130°C, outperforming standard PCB materials.
    • Enhanced Relay: The Pro model’s 20A relay triples industry-standard load capacity for heavy-duty applications.

  2. Version Selection Guide:

    • Base Model: Ideal for hobbyists building simple audio visualizers or educational kits.
    • Advanced Model: Best for intermediate users needing wider voltage support (e.g., car audio systems).
    • Pro Model: Engineers and professionals benefit from UL certification and industrial-grade relay performance. For instance, with the Pro’s 20A relay, you can safely control industrial motors or high-power lighting systems. Pair its expanded LED array with variable resistor inputs to create precision audio monitoring tools.

Frequently asked questions

  • Which DIY audio level indicator kit suits home studio setups?

  • How to clean SMD components on the LM3915 circuit board?

  • SMD vs Through-Hole: Which is better for DIY electronics projects?

  • Can the LM3915 circuit board be modified for custom projects?

  • Is the LM3915 IC in this kit RoHS compliant?

  • Can this kit be used for guitar effects pedals?

  • What’s the best way to handle LEDs during assembly?

  • Is this kit suitable for teaching electronics basics?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Audio Level IndicatorsStudio monitoring, audio equipment setupIndustry: 8-segment LED (IEC 60115)
Our Base: 10-segment LM3915 (▲)
Advanced: 20-segment (▲▲)		▲ Higher resolution (10/20 segments) for precise audio visualization.
Cost-effective.		Limited to fixed segments; may require external amplification for high-end setups.
LED Display SystemsDIY visual feedback, signage projectsIndustry: 5mm LEDs (20mA, IEC 60115)
Base: 10 high-brightness LEDs
Advanced: RGB LEDs (▲▲)		Bright, durable display; easy integration.
RGB option (Advanced) adds color versatility.		Fixed LED count; RGB requires more complex wiring.
Relay Control ModulesAutomation, heavy-load switchingIndustry: 5V/5A relays (UL 10A)
Base: 5V/10A relay (▲)
Advanced: 12V/15A (▲▲)		Handles high-power devices (e.g., motors).
Reliable switching.		Audible relay click; may need heatsinking for continuous use.
SMD Mounting SolutionsCompact electronics, PCB assemblyIndustry: Through-hole components (IPC-A-610 Class 1)
Base/Advanced: SMD (▲) compliant with IPC-A-610 Class 2		▲ Space-saving design; robust solder joints.
Easier automated assembly.		Requires specialized soldering tools; less user-modifiable.
DIY Educational KitsHobbyist projects, learning electronicsIndustry: Pre-assembled boards
Base/Advanced: Modular FR-4 PCB (ISO 178 flexural strength)		▲ Fully customizable; teaches soldering and circuit design.
Affordable.		Requires soldering skills; no pre-assembled parts.
Power Amplifier ModulesSpeaker systems, audio playbackIndustry: 3W output (THD 5%)
Base: 5W (THD <1%, IEC 60268-3)
Advanced: 10W (▲▲)		▲ Clean audio output (low distortion); sufficient for small setups.Limited power for large venues; may overheat under heavy use.

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