vha3's comments

On: Ask HN: Share your personal website

[vha3]

https://vanhunteradams.com

On: PID Controller Explainer (2022)

[vha3]

https://vanhunteradams.com/PID/PID_Analytical.html

(In full disclosure, this is a resource that I put together)

On: RP2040 Boot Sequence

[vha3]

Some fun easter eggs in the bootrom. It seems like kilograham is a Doors fan: https://github.com/raspberrypi/pico-bootrom/blob/ef22cd8ede5...

[duskwuff → vha3]

There's another really subtle easter egg hidden in bootrom_rt0.S:

https://github.com/raspberrypi/pico-bootrom/blob/ef22cd8ede5...

And the explanation:

https://news.ycombinator.com/item?id=30970274

On: Natural Computing [video]

[vha3]

Does there exist a latent computational potential in nature which might be unlocked?

Slides here: https://vanhunteradams.com/Talks/Natural_Computing.pdf

On: Birdsong Synthesizer Implemented with RP2040

[vha3]

More details here: https://vanhunteradams.com/Pico/Birds/Birdsong.html

[sitkack → vha3]

This is beautiful!

One could add a MIDI input to the RP2040 and create a BirdSynth!

https://github.com/rppicomidi/midi2usbhost

https://learn.adafruit.com/midi-for-makers/receive-and-displ...

On: Cornell University’s Digital Systems Design Course Is Taught on RP2040

[vha3]

Lectures and course materials available here:

https://ece4760.github.io

On: Cornell Course on Raspberry Pi Pico

[vha3]

The course website (linked) contains the documentation and bill of materials for each lab assignment. All lectures will be posted online starting 8/22/2022. We'll be synthesizing cricket chirps, animating flocking algorithms, and balancing an inverted pendulum with a reaction wheel. Please feel free to follow along.

On: Is the Kalman filter just a low-pass filter?

[vha3]

A fantastic discussion of Kalman filters is here: http://www.anuncommonlab.com/articles/how-kalman-filters-wor...

And a more technical introduction based on the article above: https://vanhunteradams.com/Estimation/Estimation.html

On: Astrodynamics Textbooks on My Shelf

[vha3]

It is still a work in progress, but Dmitry Savransky of Cornell is working on an interactive astrodynamics textbook using Jupyter notebooks. Link here: https://github.com/dsavransky/astrodynamicsbook

On: Bombe Machine on an FPGA

[vha3]

Students implemented a Bombe Machine on a DE1-SoC.