1. Introduction
This manual provides detailed instructions for the assembly, setup, operation, and maintenance of your Nobsound AK2515 Audio Spectrum VFD Display. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your user experience.
2. Package Contents
Verify that all items listed below are included in your package. If any items are missing or damaged, please contact customer support.
- 1x AK2515 Audio Spectrum Analyzer Board
- 2x Acrylic Boards (for casing)
- 1x 3.5mm Audio Cable
- 1x USB-DC Power Cable
- 1x 23.5mm Cable
- 1x Set of Mounting Screws (with spare)
3. Assembly Instructions
The main board and acrylic boards are packaged separately. Assembly is straightforward and requires only a few screws.
- Carefully unpack all components.
- Identify the main circuit board and the two acrylic panels.
- Align the acrylic panels with the main board, ensuring the display faces outwards and the input/output ports are accessible.
- Secure the acrylic panels to the main board using the provided screws. Use the small L-shaped hex wrench if necessary.
4. Features
- Accurate Music Spectrum Analyzer and Clock Display: Features a 25x15 high-resolution dedicated VFD display, ensuring accuracy across various frequency bands. An integrated SD3078 crystal oscillator provides high-precision clock display with an accuracy of ±5ppm, resulting in a monthly error of less than 10 seconds.
- Wide Frequency Range Display and 3.5mm AUX/MIC Input: Supports a frequency sweep from 20 Hz to 20 KHz, allowing for precise frequency point testing. Equipped with a 3.5mm AUX input and a high-sensitivity microphone pickup, enabling both wired and wireless connections to easily detect subtle sound changes.
- Special AGC Algorithm and Customizable Output Curves: A unique AGC algorithm ensures ideal visual effects across a wide range of input signal levels, preventing non-display for low signals and full-screen display for high inputs. Gain can be switched between -10/-5/-3/-1/0dB. Three display modes are available: Real Output, Smooth Output I, and Smooth Output II, providing accurate and high-level display effects for various usage scenarios.
- Multiple Adjustable Items and Display Effects: Brightness, main light column fall speed, hold time, and peak fall speed can be individually adjusted. Choose freely from 5 music spectrum display modes and 2 clock display modes. All settings are saved with power-off memory, eliminating the need for re-configuration after restarting.
5. Setup
5.1 Power Connection
Connect the USB-DC power cable to the 5V DC IN port on the device and plug the other end into a compatible USB power source (e.g., a 5V USB adapter, computer USB port).
5.2 Audio Input
The AK2515 supports two types of audio input:
- 3.5mm AUX Input: Use the provided 3.5mm audio cable to connect your audio source (e.g., smartphone, computer, audio player) to the 3.5mm AUX input port on the device. This is suitable for direct, wired audio signals.
- Microphone Pickup: The device has a built-in high-sensitivity microphone for wireless sound detection. This allows the display to react to ambient sounds without a direct cable connection.
6. Operation
The device is controlled using the 'Up', 'OK', and 'Down' buttons located on the unit.
6.1 Basic Navigation
- 'Up' Button: Navigates through menu options or increases values.
- 'Down' Button: Navigates through menu options or decreases values.
- 'OK' Button: Selects an option or confirms a setting.
6.2 Display Modes
The AK2515 offers 5 music spectrum display modes and 2 clock display modes. Use the navigation buttons to cycle through and select your preferred mode.
6.3 Adjustable Parameters
You can adjust various display parameters to suit your preferences:
- Brightness: Adjust the overall display intensity.
- Main Light Column Fall Speed: Controls how quickly the main spectrum bars descend.
- Hold Time: Sets the duration for which peak values are held on the display.
- Peak Fall Speed: Controls how quickly the peak indicators descend.
- Gain: Adjust the input sensitivity between -10/-5/-3/-1/0dB to optimize visual response for different audio levels.
All settings are saved automatically due to the power-off memory function, so you do not need to reconfigure them after restarting the device.
7. Specifications
| Parameter | Value |
|---|---|
| Brand | Nobsound |
| Model Number | PJ454 (AK2515) |
| Max Supply Voltage | 5 Volts |
| Min Supply Voltage | 5 Volts |
| Channel Count | 15 |
| Frequency Response | 20 Hz - 20 KHz |
| Clock Accuracy | ±5ppm (monthly error < 10 seconds) |
| Display Type | VFD (Vacuum Fluorescent Display) |
| Display Resolution | 25x15 |
8. Troubleshooting
- No Display: Ensure the power cable is securely connected to a 5V power source. Check if the device is turned on.
- No Audio Reaction: Verify that the audio source is playing and connected correctly to the 3.5mm AUX input, or that the microphone is not obstructed if using MIC pickup. Adjust the gain setting if the input signal is too low.
- Incorrect Time Display: Use the navigation buttons to enter clock settings and adjust the time.
- Display Appears Dim: Adjust the brightness setting using the control buttons.
9. Maintenance
To ensure the longevity and optimal performance of your Nobsound AK2515, follow these maintenance guidelines:
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the device to strong impacts.
- Ensure proper ventilation around the device to prevent overheating.
10. Warranty and Support
Nobsound products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official Nobsound website. Please retain your proof of purchase for warranty claims.