• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you an connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus. What's better than a single LED? Lots of LEDs! But adding an LED matrix can mean a lot of wiring & space. This little kit makes the whole thing simple & tidy! The product kit comes with:A fully tested & assembled LED backpack 1.2" Ultra-bright 8x 8 matrix 4-pin header Adafruit have even provided a tutorial showing how to solder, wire & control the display & click here for the library to help you get started! ...

• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus. What's better than a single LED? Lots of LEDs! But adding an LED matrix can mean a lot of wiring & space. This little kit makes the whole thing simple & tidy! The product kit comes with:A fully tested & assembled LED backpack 1.2" Ultra-bright 8x 8 matrix 4-pin header Adafruit have even provided a tutorial showing how to solder, wire & control the display & click here for the library to help you get started! ...

• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus. What's better than a single LED? Lots of LEDs! But adding an LED matrix can mean a lot of wiring & space. This little kit makes the whole thing simple & tidy! The product kit comes with:A fully tested & assembled LED backpack 1.2" Ultra-bright 8x 8 matrix 4-pin header Adafruit have even provided a tutorial showing how to solder, wire & control the display & click here for the library to help you get started! ...

• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus. What's better than a single LED? Lots of LEDs! But adding an LED matrix can mean a lot of wiring & space. This little kit makes the whole thing simple & tidy! The product kit comes with:A fully tested & assembled LED backpack 1.2" Ultra-bright 8x 8 matrix 4-pin header Adafruit have even provided a tutorial showing how to solder, wire & control the display & click here for the library to help you get started! ...

• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus. What's better than a single LED? Lots of LEDs! But adding an LED matrix can mean a lot of wiring & space. This little kit makes the whole thing simple & tidy! The product kit comes with:A fully tested & assembled LED backpack 1.2" Ultra-bright 8x 8 matrix 4-pin header Adafruit have even provided a tutorial showing how to solder, wire & control the display & click here for the library to help you get started! ...

• No microcontroller required
- power with 1.8 to 5VDC & touch the pad to activate the sensor• Toggle output
- touch-on then

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• No microcontroller required
- power with 1.8 to 5VDC & touch the pad to activate the sensor• Toggle output
- touch-on then

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• Contains a class D controller, able to run from 2.7V-5.5VDC.• Since the amp is a class D, it's incredibly efficient (89% efficient when driving an 8O speaker at 1.5 Watt)
- making it perfect for portable & battery-powered projects• Output Power: 2.8W at 4O, 10% THD, 1.7W at 8O, 10% THD, with 5V Supply•PSRR: 80 d B, 5ms start-up time• Designed for use without an output filter, when wires are kept at under 2""-4"" long•I2C interface pins for setting gain, AGC configuration parameters, etc. See the tutorial for more details• Selectable gain from -28d B to 30d B• Excellent click-&-pop suppression• Thermal shutdown protection• Shutdown pin for power saving mode• Low current draw: 3.5m A quiescent & 0.2u A in shutdown mode• Inputs of the amplifier go through 1.0u F capacitors, so they are fully 'differential'
- if you don't have differential outputs, simply tie the R- & L- to ground• Outputs are "" Bridge Tied""
- that means they connect directly to the outputs, no connection to ground• The output is a ~300 K Hz square wave PWM that is then 'averaged out' by the speaker coil
- the high frequencies are not heard A mini class D with AGC & I2C control? Yes please! This incredibly small stereo amplifier is surprisingly powerful. It is able to deliver 2 x 2.8W channels into 4 ohm impedance speakers (@ 10% THD) & it has a i 2c control interface as well as an AGC (automatic gain control) system to keep your audio from clipping or distorting. If you don't want to use I2C to control it, it does start up on with 6d B gain by default & the AGC set up for most music playing. We do suggest using it with a microcontroller to configure it, however, since its quite powerful. Settings are not stored in the chip, so you'll need to adjust any gain & AGC amplification settings every time the amp is powered up. Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly efficient (89% efficient when driving an 8O speaker at 1.5 Watt)
- making it perfect for portable & battery-powered projects. It has built in thermal & over-current protection but we could barely tell if it got hot. This board is a welcome upgrade to basic "LM386" amps! The inputs of the amplifier go through 1.0u F capacitors, so they are fully 'differential'
- if you don't have differential outputs, simply tie the R- & L- to ground. The outputs are " Bridge Tied"
- that means they connect directly to the outputs, no connection to ground. The output is a ~300 K Hz 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 & tested breakout board with 1.0u F input capacitors. We also include 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, & some header in case you want to plug it into a breadboard. Adafruit's awesome tutorial & Arduino library will let you set the AGC configuration (you can also just turn it off), max gain, & turn on/off the left & right channels all over I2C! You will be ready to rock in 20 minutes!







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• Output Power: 2.8W at 4O, 10% THD, 1.7W at 8O, 10% THD, with 5V Supply•PSRR: 70 d B typ @ 217 Hz with 6 d B gain• Designed for use without an output filter, when wires are kept at under 2""-4"" long• Four pin-selectable gains: 6d B, 12d B, 18d B & 24d B• Select with the onboard switches or by setting the G0 & G1 breakout pins• Excellent click-&-pop suppression• Thermal shutdown protection• Independent channel shutdown• Low current draw: 5m A quiescent & 2u A in shutdown mode• To view the schematic please click here This incredibly small stereo amplifier is surprisingly powerful
- able to deliver 2 x 2.8W channels into 4 ohm impedance speakers (@ 10% THD). Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC & incredibly efficient (89% efficient when driving an 8O speaker at 1.5 Watt)
- making it perfect for portable & battery-powered projects. Inputs of the amplifier go through 1.0u F capacitors, so they are fully 'differential'
- if you don't have differential outputs, simply tie the R- & L- to ground. Outputs are "" Bridge Tied""
- that means they connect directly to the outputs, no connection to ground. The output is a ~300 K Hz 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 & tested breakout board with 1.0u F input capacitors. We also include a dual mini DIP switch for setting the amplifier gain on the fly, 3.5mm screw-terminal blocks so you can easily attach/detach your speakers, & some header in case you want to plug it into a breadboard. You will be ready to rock in 15 minutes! Speakers are not included, use any 4 ohm or 8 ohm impedance speakers.




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• Power from 4.5V-14V DC voltage• Up to 93% efficient (88-93% typical)•20m A quiescent current (or put into shutdown for 1u A quiescent)• Up to 29.5d B max gain• Use DC or AC coupled line-level input, up to 3 Vpp• Filter less Spread-Spectrum Modulation Lowers• Radiated RF Emissions from Speaker Cables•20W Stereo Output (4O, VDD = 12V, THD+N = 10%)• Low 0.04% THD+N• Integrated Click-&-Pop Suppression• Short-Circuit & Thermal-Overload Protection•
Includes: polarity-protection, jacks & terminal blocks, i 2c level shifting, & a spot to solder in a volume pot• Check out the detailed tutorial please click here Pump up the volume with this 20W stereo amplifier! This slim little board has a class D amplifier onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each. Power it with 5-12VDC using the onboard DC power jack & plug stereo line level into the 3.5mm stereo headphone jack & jam out with ease. Since it's class D, its completely cool-running, no heat sinks are required & it's extremely efficient
- up to 93% efficiency makes it great for portable or battery powered rigs. We like the MAX9744 amplifier at the heart of this board because its very easy to use, but it also has both analogue & digital volume control capability. Use a single 1KO pot (we include one) to adjust volume analogue-style. Or hook it up to your favourite microcontroller & send I2C commands to set 64-steps of volume amplification.

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