Adafruit AW9523 GPIO Expander and LED Driver Breakout
Product number: ADA4886
CHF 4.45
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Description
Product information "Adafruit AW9523 GPIO Expander and LED Driver Breakout"
GPIO expanders work like this: you have a board with a certain number of GPIO, but not enough for your project - maybe you need more buttons or LEDs. You could upgrade to a board with a massive number of GPIOs, like the Grand Central, or you could plug in one of these boards. Connect it via I2C and then you can send/receive I2C commands to control the GPIO pins to write and read them. This will be slower than direct GPIO access, but maybe that doesn't matter if it takes a millisecond instead of a microsecond. You only need the two I2C pins and you can even share the I2C port with other sensors and devices. You can even add more expanders for massive I/O control!
The AW9523 is a modification of the usual I2C expander:
- Firstly, it's very cheap - who doesn't love that?
- It has 16 I/O pins, which doubles the pin count of most boards
- Four I2C address options, so you can connect 4 expanders to one bus
- Each pin can be an input or an output
- IRQ output can alert you when the input pins change value
- This chip does not support internal pull-ups or pull-downs, you will need to add an external resistor if you need one
- However, the chip supports 8-bit linear constant current LED dimming, so you can connect LEDs without resistors and have great looking dimming without PWM
- The first 8 pins can be configured as open drain (as a group)
Of course, you can also use the pins to drive any pushbuttons or other I/O - we just think this board is particularly well suited to driving LEDs. There is also an interrupt output, you can enable the pin change IRQ for any pins so that you can be notified when it is time to read the I/O states.
A special feature of this chip is that the default I2C address determines the initial boot state of the pins. Our libraries immediately perform a soft reset and configure all pins to inputs and push-pull, so you can expect the same behaviour no matter what the I2C address is. However, we recommend you check the datasheet Table 1 to make sure your hardware isn't affected.
We've written both Arduino and CircuitPython/Python libraries for the AW9523 so you can get started right away, whether you have an Arduino-compatible UNO or a Raspberry Pi 4 - or anything in between.
To get you started quickly, we've developed a customised board in theSTEMMA QT form factor that's easy to use. The STEMMA QT connectors on both sides are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the AW9523 or connect it to a variety of other sensors and accessories via a compatible cable.
QT cable is not included.
Properties
| Zolltarifnummer: | 85423111 |
|---|---|
| Brand: | Adafruit |
| Country of Origin: | USA |
| EAN: | 4060137068201 |
| Gross Weight (kg): | 0.005 |
| Manufacturer ID: | 4886 |
| Product ID: | ADA4886 |
Manufacturer
Adafruit
Adafruit: The expert for open source hardware
For more than ten years, programmers and tinkerers have benefited from the expertise of the Adafruit brand. Whether for beginners or proven experts, Adafruit has the right hardware components ready for your next IoT project.
Light comes into the dark with Adafruit NeoPixel
One extremely popular product line from the company's broad portfolio is Adafruit NeoPixel. These nifty LED components come in a wide variety of designs and color temperatures. NeoPixel modules are available, for example, in the form of a practical stick with five intelligent LEDs in red, green and blue (RGB) or in white (W), as a shield with 40 eye-saving RGBW LEDs in which all pixels are individually addressable, and as a jewel with seven RGBW LEDs that can be controlled with 8-bit PWM per channel.
Especially popular is the Adafruit NeoPixel Ring with 16 ultra-bright, intelligent RGB LEDs including integrated drivers, which you only need a single microcontroller to control. The trick is that the Adafruit NeoPixel rings form a chain, so to speak: You couple the output pin of one with the input pin of the other.
With the Adafruit NeoPixel products you can realize a wide variety of projects - there are virtually no limits to your creativity. With the help of an Arduino, a jumper cable and the appropriate software, you can control a NeoPixel ring individually and light up the small LEDs as you wish - either individually or in a specific combination. This way, you can also create your own Vu meter with the versatile LED components. Practical: To make programming Adafruit NeoPixel easier, Adafruit provides an Arduino library as well as a Python library.
Adafruit Feather Boards: Powerful hardware in a compact format
With Adafruit Feather, the hardware specialist from the States also has various powerful development boards in its range, which are essentially equivalent to an Arduino in terms of function. All of these boards are equipped with similar features; among other things, the pin assignment is the same and there are also many parallels when it comes to the microcontrollers and the battery charging properties. In addition, you can also find Feather boards with special devices like Bluetooth, Wi-Fi and cellular network connectivity as well as boards with microSD slot in Adafruit's product range. The name "Feather" is no coincidence: The boards are also characterized by being particularly compact and, above all, lightweight.
The range of top-class product highlights is wide: The STM32F405 Feather, for example, is the fastest CircuitPython board from Adafruit with an outstanding 168 MHz and meets the highest demands. It is equipped with a STEMMA QT / Qwiic port at the end, which makes it easy to connect to I2C sensors. The Adafruit Feather nRF52840 Express, on the other hand, shines with Bluetooth Low Energy and can also be used with CircuitPython thanks to native USB support.
Another important part of Adafruit's portfolio are the FeatherWings. With these expansion modules, you can also include components such as a display or a motor driver in your IoT project. The FeatherWing Proto is a proven classic in Adafruit's portfolio. This is ideally suited as a prototyping add-on for all Feather boards. The Adafruit FeatherWing Wing Tripler Mini Kit, on the other hand, is ideal if you want to connect a Feather to two other FeatherWings at the same time.
With the Adafruit MIDI FeatherWing Kit you get a music capable FeatherWing, thanks to which you can equip your Feather with MIDI input and output jacks. And with the Adafruit FeatherWing OLED you can easily add a small OLED display to your Feather board - no soldering required.
Adafruit: What's behind the brand
As an expert in open-source hardware, Adafruit has long since established itself in the electronics industry. The company was founded in 2005 by Limor Fried. At the time, the talented and innovative electrical engineer was still a student at the renowned Massachusetts Institute of Technology (MIT). To this day, Fried is CEO of the electronics giant, which is now headquartered in New York. The company's name also goes back to its founder: Fried was once known on the World Wide Web by the nickname "Ladyada" - a tribute to the famous IT pioneer Ada Lovelace.
Adafruit says it is committed to getting more people excited about technology and science - and thanks to its first-class products, the hardware expert from the USA is sure to succeed!
Manufacturer and safety information
Adafruit Industries, LLC
168 39th Street 1905CC
US 11232 Brooklyn, New York
https://www.adafruit.com
support@adafruit.com
WEEE number: 20453810
Person responsible for the EU
Sertronics GmbH
Am Studio 20d
DE 12489 Berlin
https://www.berrybase.de
info@berrybase.de
Safety instructions
- Do not use the LED controller in damp or wet environments unless it is expressly labelled as waterproof.
- Only operate with the specified operating voltage and current to avoid damage or short circuits.
- Do not use damaged cables or plugs to avoid the risk of electric shock or fire.
- Avoid direct sunlight or extreme heat to prevent the appliance from overheating.
- Children and untrained persons may only use the appliance under supervision.
- To prevent injury or damage, do not open or tamper with the appliance during operation.
- In the event of a defect or malfunction, disconnect the appliance and have it checked by qualified personnel.
- For disposal: Do not dispose of in household waste, but recycle in accordance with local regulations for electronic waste or hand in at collection points.
- Ensure that batteries (if used) are separated and disposed of properly.
- During intensive use, always ensure adequate ventilation to prevent heat build-up.
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