1. はじめに
This manual provides detailed instructions for the assembly, operation, and maintenance of the Velleman MK136 Super Stereo Ear Project Kit. The MK136 is an electronic kit designed for hobbyists and enthusiasts to build a device capable of amplifying ambient sounds in stereo, providing an immersive audio experience through headphones. This kit requires soldering and basic electronics knowledge for successful assembly.
2. 安全に関する注意事項
- はんだ付けを行う際は必ず適切な目の保護具を着用してください。
- はんだの煙を吸い込まないように、作業スペースの換気を十分に行ってください。
- Use a grounded soldering iron to prevent electrostatic discharge (ESD) damage to sensitive components.
- Verify component polarity and placement before soldering to prevent damage to the circuit.
- Keep the kit and tools out of reach of children.
- Do not apply power to the circuit until all components are correctly installed and connections are verified.
3.キットの内容
Before beginning assembly, verify that all components listed below are present in your kit. If any parts are missing or damaged, contact your supplier.
- プリント基板 (PCB)
- 抵抗器（さまざまな値）
- コンデンサ（電解コンデンサとセラミックコンデンサ）
- Integrated Circuits (ICs) and sockets
- Electret Microphones (2)
- Potentiometer (volume control)
- 3.5mmステレオヘッドホンジャック
- Battery Clip (for 9V battery)
- LED (Power indicator)
- Miscellaneous hardware (e.g., wires, standoffs)
4. 組み立て手順
Follow these steps carefully to assemble your Velleman MK136 Super Stereo Ear kit. Refer to the PCB silkscreen markings for component placement.
- コンポーネントの識別: Sort all components by type and value. Use a multimeter to verify resistor values if unsure.
- Resistor Installation: Solder all resistors onto the PCB according to their marked positions. Ensure good solder joints.
- Diode/LED Installation: Solder any diodes and the LED, paying close attention to polarity (the longer lead of an LED is typically positive).
- コンデンサの取り付け: Install ceramic capacitors (non-polarized) and then electrolytic capacitors. For electrolytic capacitors, observe polarity: the longer lead is positive, and the stripe on the casing indicates the negative lead.
- IC Socket Installation: Solder the IC sockets onto the PCB. Ensure the notch on the socket aligns with the notch on the PCB silkscreen. Do not insert the ICs yet.
- Potentiometer and Headphone Jack: Solder the potentiometer and 3.5mm headphone jack into their designated positions.
- マイクの取り付け: Solder the two electret microphones. Pay attention to their polarity if indicated on the PCB or component itself.
- Battery Clip: Solder the red wire of the battery clip to the positive (+) terminal and the black wire to the negative (-) terminal on the PCB.
- 最終検査: Carefully inspect all solder joints for bridges, cold joints, or incorrect component placement.
- IC Insertion: Once satisfied with the inspection, carefully insert the Integrated Circuits into their respective sockets, ensuring the notch on the IC aligns with the notch on the socket and PCB. Bend the pins slightly inward if necessary to ensure proper fit.
Image 1: Fully assembled Velleman MK136 Super Stereo Ear circuit board. This image shows the compact green PCB populated with various electronic components including resistors, capacitors, integrated circuits, two electret microphones (one on each side), a volume potentiometer, and a headphone jack. The board is designed for a 9V battery power source.
5. 操作手順
- 電源接続: Connect a fresh 9V battery to the battery clip. The power indicator LED should illuminate.
- ヘッドホン接続: Plug a pair of stereo headphones (3.5mm jack) into the headphone output jack on the circuit board.
- 音量調整: Rotate the potentiometer knob to adjust the volume level. Start with the volume at its lowest setting and gradually increase it to a comfortable listening level.
- マイクの向き: Position the two electret microphones to capture sounds from desired directions. The stereo effect will be more pronounced when the microphones are oriented to pick up sounds from different spatial locations.
- 電源を切る： To turn off the device, disconnect the 9V battery.
6. メンテナンス
- クリーニング： Keep the circuit board clean and free from dust and debris. Use a soft, dry brush or compressed air for cleaning.
- バッテリー交換: Replace the 9V battery when the sound becomes weak or distorted, or if the power LED fails to illuminate brightly.
- ストレージ： When not in use, store the device in a dry, cool place, away from direct sunlight and extreme temperatures. Disconnect the battery during long periods of storage to prevent leakage.
- コンポーネントの検査: Periodically inspect solder joints and components for any signs of damage or corrosion. Re-solder any loose connections.
7。 トラブルシューティング
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| 音が出ない、または非常に小さい音です。 |
|
|
| 音が歪んだり、ノイズが出たりする。 |
|
|
| 電源LEDが点灯しません。 |
|
|
8. 仕様
- モデル： MK136
- 電源： 9V DC (e.g., 9V battery)
- 出力： 3.5mmステレオヘッドホンジャック
- マイク: 2x Electret Microphones
- コントロール: Volume Potentiometer
- Dimensions (assembled PCB): 約6 x 4 x 0.5インチ（15.24 x 10.16 x 1.27 cm）
- Weight (assembled): 約2.4オンス（68グラム）
- RoHS準拠: はい
9. 保証とサポート
As a project kit, the Velleman MK136 is intended for educational and hobbyist use. Due to the nature of DIY assembly, warranty coverage typically applies to defective components at the time of purchase, not to issues arising from incorrect assembly or soldering. For support regarding missing parts or defective components, please contact your original retailer or Velleman customer service with your proof of purchase.
For additional resources, technical diagrams, or community forums, please visit the official Velleman website or relevant electronics hobbyist communities online.
