The Adafruit STEMMA Audio Amp is a super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8Ω speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps!
This board is a simplified version of our breadboard-friendly Adafruit Mono 2.5W Class D Audio Amplifier board. This version is designed to be 'plug and play' - with no soldering required. You can input the audio via the JST-PH 3 Pin connector - such as a pin header cable or one with alligator clips. The trade-off is that this board doesn't have differential inputs, instead the audio inputs are referenced to the power/signal ground wire.
The input to the amplifier goes through 1.0uF capacitors so you can have DC . The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly.
Comes with a fully assembled and tested breakout board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Speaker is not included, use any 4 ohm or greater impedance speaker.
Comes with a fully assembled and tested breakout board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Speaker is not included, use any 4 ohm or greater impedance speaker.
- Output Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply
- 50dB PSRR at 1KHz
- Filterless design, with ferrite bead + capacitors on output.
- Fixed 24dB gain, onboard trim potentiometer for adjusting input volume.
- Thermal and short-circuit/over-current protection
- Low current draw: 4mA quiescent and 0.5mA in shutdown (due to pullup resistor on SD pin)
Note: The terminal block included with your product may be blue or black.
Buy with Confidence
We're Australia's only Raspberry Pi approved reseller in Sydney, Australia.
How do you Ship your Raspberry Pis?
We ship via Australia Post eParcel from our Sydney warehouse.
Australia Post picks up from us daily.
Asll shipping methods we use have tracking.
Do you ship from Sydney, Australia?
All our products ship from our warehouse in Sydney, Australia.
What payment methods do you accept?
We accept all major credit cards, Apple Pay, Google Pay and PayPal.
We also accept purchase orders from educational and government institutions on 30-day terms.
You're automatically approved if you're a school, university, or state or federal government department or agency.
What is your return, exchange and warranty policy?
Returns
We accept returns for faulty products, but will first work with you to help get your Raspberry Pi working again.
99% of the time there it is not the Raspberry Pi that is faulty.
If you need help, reach out to us on help@littlebird.com.au.
Change of Mind
We are happy to accept a return for a "change of mind", however, you will need to cover the cost of any merchant fees associated with the return. Goods need to be in an "as new" state.
What's the warranty on your Raspberry Pis?
You can have peace of mind knowing that Raspberry Pi is backed by a 1-year warranty, and thanks to rigorous quality assurance testing in the UK factory, you can be sure that your Raspberry Pi will stay in good working condition.
How long does shipping and delivery take?
At our Sydney, Australia warehouse, we provide fast and reliable shipping. To go even further, we have created our own Raspberry Pi powered Robot called Bishop.
How long does delivery take?
Australia Post picks up from us daily. If you're within the Australia Post next day network you can usually expect your order to arrive the next day if ordered with Express Post before 2pm.
80% of Australian addresses covered and you probably already know if you're in the network.
How can I track my order?
When we ship your order (which we do daily), we send you a tracking link.
If you haven't received a tracking link, please email us on help@littlebird.com.au .
How do I contact customer service?
You can call us on 1300 240 817 or email help@littlebird.com.au .
Do you have a secure website?
Yes, our website is secure and we use the latest security features to ensure your data is always kept safe.
Can I get my order shipped to a PO Box or Parcel Locker?
If you want to ship to a PO Box, Parcel Locker or another otherwise anonymising delivery address, we need you to use Paypal at checkout.
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