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Description Adafruit NeoDriver - I2C NeoPixel Driver Board - Stemma QT
NeoPixel LEDs (also known as WS2812 / SK6812 family) are an easy way to add addressable RGB lighting using just a single GPIO . They are everywhere on microcontrollers. Some chips or single board computers (SBCs) do not support neopixels. This is due to the precision required when transmitting data.
Adafruit has their Blinka library which supports CircuitPython libraries, including the NeoPixel library. However, without a suitable 'neopixel_write' implementation for that platform, it simply won't work. Writing the neopixel writer function is not straightforward for many chips. Fast GPIO and perfect nanosecond timing are essential.
A quick fix is this seesaw-based NeoDriver board. It sends the NeoPixel data via I2C and takes care of perfect pixel timing on the other side. The board uses an ATtiny1616. This gives you enough RAM for a 512-pixel long array. It's not blazing fast because of the I2C communication. But with an 800KHz or 1MHz I2C clock and as long as you don't write the entire strip at once, it's not too bad.
A 5V charge pump has been added to the module, so you can get a clean 5V signal even on 3V boards. The pre-soldered terminal blocks and Stemma QT connectors make for a solderless solution, making it easy to add NeoPixels to any I2C device. The default I2C address is 0x60, but by cutting the bottom solder traces you can change it to anywhere between 0x60-0x67 .
Note: To power NeoPixels you will need about 10-30mA per pixel of pure 5V DC power, available on the terminal blocks . Or you can connect the 5V directly to the pixels if there are separate red and black power wires. The Stemma QT port cannot provide this power, so an external power supply is required!
Adafruit NeoDriver - I2C NeoPixel Driver Board - Stemma QT
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5150+ reviews
4.7 avg.
5150+ reviewsView allSKU: ADA3021 Categories: LED & Display , Switches , Adafruit
Description Adafruit NeoDriver - I2C NeoPixel Driver Board - Stemma QT
NeoPixel LEDs (also known as WS2812 / SK6812 family) are an easy way to add addressable RGB lighting using just a single GPIO . They are everywhere on microcontrollers. Some chips or single board computers (SBCs) do not support neopixels. This is due to the precision required when transmitting data.
Adafruit has their Blinka library which supports CircuitPython libraries, including the NeoPixel library. However, without a suitable 'neopixel_write' implementation for that platform, it simply won't work. Writing the neopixel writer function is not straightforward for many chips. Fast GPIO and perfect nanosecond timing are essential.
A quick fix is this seesaw-based NeoDriver board. It sends the NeoPixel data via I2C and takes care of perfect pixel timing on the other side. The board uses an ATtiny1616. This gives you enough RAM for a 512-pixel long array. It's not blazing fast because of the I2C communication. But with an 800KHz or 1MHz I2C clock and as long as you don't write the entire strip at once, it's not too bad.
A 5V charge pump has been added to the module, so you can get a clean 5V signal even on 3V boards. The pre-soldered terminal blocks and Stemma QT connectors make for a solderless solution, making it easy to add NeoPixels to any I2C device. The default I2C address is 0x60, but by cutting the bottom solder traces you can change it to anywhere between 0x60-0x67 .
Note: To power NeoPixels you will need about 10-30mA per pixel of pure 5V DC power, available on the terminal blocks . Or you can connect the 5V directly to the pixels if there are separate red and black power wires. The Stemma QT port cannot provide this power, so an external power supply is required!