Micro Round Speaker 10mm 8 Ohm 0.5W - Ultra-Miniature Audio Driver

Specifications:

• Diameter: 10mm
  
• Thickness: ~3.5mm
  
• Power Rating: 0.5 Watt (Max)
  
• Impedance: 8 Ohm
  
• Frequency Response: High/Mid-Range (Voice/Beeps)
  
• Magnet Type: Neodymium (Internal)
  
• Diaphragm Material: Mylar
  
• Connection: Micro Solder Pads

Key Applications & Projects

• Earphone Repair: Ideal replacement driver for broken earbuds or Bluetooth headsets.
  
• Micro-Robotics: Audio feedback for insect-scale robots or swarm bots.
  Wearables: Notifications in smart rings, pendants, or glasses.
  
• Medical Devices: Alarms in portable health monitors where space is critical.
  
• Spy Gadgets: Hidden audio devices for discreet communication.

The Project Evolution 

• Prerequisite: You might be using an LED to indicate status on your Attiny85 or wearable project.
  
• The Upgrade: Add this 10mm speaker to give your device a voice. Due to its low power draw, it pairs perfectly with low-power microcontrollers.
  
• Effort Level: Advanced Soldering. The solder pads are very small and require a steady hand.
  
• Hardware Needed: 1x Attiny85/Arduino Nano, 1x Transistor/Micro-Amp, 1x 10mm Speaker.

Virtual Technician & Wiring Guide 

⚠️ Soldering Warning: The solder pads on the back of this 10mm speaker are extremely small and close to the plastic housing.

• Temperature: Use a fine-tip soldering iron at a lower temperature (~300°C).
• Speed: Touch the iron for max 1-2 seconds. Overheating will melt the plastic housing or detach the internal voice coil wire.
• Wire: Use extremely thin wire (30 AWG or 32 AWG enameled wire is best).

Amplification: Despite its size, it is an 8 Ohm load. Do not drive it directly from a microcontroller pin. Use a transistor driver (2N2222) or a micro amplifier (PAM8302).

Package  Includes:

1 X Micro Round Speaker 10mm 8 Ohm 0.5W - Ultra-Miniature Audio Driver

Frequently Asked Questions (FAQ)

1. Can I use this to fix my earphones?
   Yes, if your earphones use a 10mm dynamic driver (common in many in-ear models), this is a suitable replacement.
2. Does it have bass?
   Virtually none. A 10mm driver cannot move enough air to produce bass frequencies. It is purely for mids and highs (vocals/treble).
3. Is it compatible with Arduino?
   Yes, but you must use a transistor or amplifier circuit. Direct connection to a GPIO pin will damage the Arduino.
4. What is the "Plus" (+) terminal?
   On these micro speakers, polarity is often unmarked. If unmarked, assume either orientation works for a single speaker. For stereo pairs, test to match phases.
5. Can I glue it?
   Yes, use a tiny dot of B-7000 or epoxy on the back magnet housing. Do not get glue on the front diaphragm or the surround.
6. Is it waterproof?
   No, it is open to the air. It is not water-resistant and should not be used in wet environments without a waterproof membrane.
7. How loud is 0.5 Watts?
   It is "earphone loud" or "quiet room loud". It is designed for close-range listening or alerts, not for filling a room with music.
8. Can I connect it to a 3W amplifier?
   Yes, but you must keep the volume extremely low (below 15%). Sending 3 Watts into this 0.5W speaker will instantly blow the coil.
9. What wire is best to use?
   Use 30 AWG or 32 AWG wire. Standard breadboard jumper wires are too heavy and stiff; they will likely rip the solder pads off the speaker.
10. Does it come with a casing?
    No, it is a raw driver element. You must build it into an enclosure or housing for it to function properly.
11. Can I use this for a hearing aid project?
    Yes, its size and frequency response make it suitable for experimental assistive hearing devices.
12. What is the frequency range?
    It typically covers ~2000Hz to 20kHz. It excels at high-pitched sounds and speech clarity.
13. Is the magnet strong?
    It uses a neodymium magnet, which is quite strong for its size. Keep it away from sensitive magnetic sensors like compasses.
14. Can I drive it with a 555 timer?
    Yes, a 555 timer circuit can drive this speaker well for creating simple alarm tones or buzzes.
15. How do I know if I blew it?
    If it stops making sound completely or only makes a crackling/scratchy noise, the voice coil is likely burnt or detached.
16. Is it sold as a pair?
    No, this is sold as a single unit. You will need to order two for stereo projects.
17. Can I use it in a model train N-scale?
    Yes, it is one of the few speakers small enough to fit inside N-scale locomotives or tight tenders.
18. Does it need an enclosure to sound good?
    Yes, even a tiny sealed chamber behind the speaker will significantly improve the volume and warmth of the sound.
19. Can I use it with a greeting card sound module?
    Yes, it is very similar to the speakers found in musical greeting cards and works well with those chips.
20. What is the impedance accuracy?
    It is rated at 8 Ohm ±15%, which is the standard tolerance for micro-speakers of this class.