FPGA’s are cool, Digital Signal Processing is cool and audio is a nice way to show it.
To get a bit better at working with FPGA’s and see if I remembered anything from DSP classes I started working on a project to combine those two. I had a board laying around with an I2S ADC/DAC that doesn’t need any configuration so the plan was to read in the audio data, process it and spit it back out. For the processing I choose to use the digital biquad filter, a fairly simple filter that can be used for a multitude of purposes. It can be used as a lowpass, highpass, bandpass, notch filter and even more. In the end I the result is that the FPGA reads in the audio data, can apply a maximum of 11 biquad filters (more are possible) and spits it back out.
As 2022 starts, let’s take some time to share our goals for CircuitPython in 2022. Just like past years (full summary 2019, 2020, and 2021), we’d like everyone in the CircuitPython community to contribute by posting their thoughts to some public place on the Internet. Here are a few ways to post: a video on YouTub, a post on the CircuitPython forum, a blog post on your site, a series of Tweets, a Gist on GitHub. We want to hear from you. When you post, please add #CircuitPython2022 and email firstname.lastname@example.org to let us know about your post so we can blog it up here.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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