Kazulog | Gruffly describes topics related to entrepreneurship, development, and IT

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ESP32 + I2S microphone (INMP441) to implement speech recognition

Implement speech recognition using ESP32 and INMP441. This time, we only want to quickly verify if the signal is being processed from the I2S microphone, so we will do up to “Receive signal from I2S microphone → Display volume level and sample statistics in real time”.

Development/Designbuilt-in(C++)

React Native: Components, JSX, Props, State

React Native is a framework for developing mobile apps in JavaScript (or TypeScript), enabling development of apps for both iOS and Android with a single code base (cross-platform development).

2025.01.01 2025.01.02

Development/DesignWebapplication(Flutter)

Difference between PDM microphones and I2S: Why does PDM require a decimation filter?

A PDM microphone is a digital microphone that expresses audio signals as a density of pulses. The converted signal consists of “high-density ones and zeros” and includes high-frequency components that exceed the human audible range (20 Hz to 20 kHz). On the other hand, I2S microphones transmit voice data in PCM format

Development/Designelectronic circuit

What is the difference between the O Series and GPT models, and what are the features of O3?

On December 20 (local time), OpenAI of the US announced a new AI model, o3. It is said to have the ability to solve complex problems and perform well in a wide range of fields, including science, mathematics, and coding. o3 mini will be available around the end of January 2025, followed by o3.

AIDevelopment/Design

[GAS] How to post the content entered in a Google Form to a specific channel in Slack.

Using GAS and the Slack API to set up automatic forwarding of submissions to Slack when submitting Google Forms; need to create a Slack app from the Slack API admin page to get the webhook URL.

Development/Design

What is the Grand Unified Theory of the Brain, the Free Energy Principle?

I had been interested in this book, but it had been piled up in my reading pile, so I finally finished it this time. I found the book interesting in its perspective of trying to unify seemingly disparate brain activities such as sensation, movement, emotion, and mental illness from the perspective of free energy.

(somebody's) sideNote/Book

[Book Review] Super-introduction: The Theory of Relativity What did Einstein think?

I was interested in Einstein's theory of relativity, but had never read it before, so I started with a very introductory reading book. It was biting and explained in a way that I could understand if I understood middle school and high school physics level. The process of law unification from Newton to Maxwell to Einstein

(somebody's) sideNote/Book

Requesting Apple to Repair a Failed Mac Port: Quick Response and 4-Day Resurrection Experience

Apple's repair process was fast and straightforward. Apart from disabling "Find My Mac" and turning off FileVault, there were no complicated steps. The pickup process was hassle-free, and being able to track the repair status online was incredibly convenient.

Note/Booklifehack

Project Hail Mary: An epic space story of scientific power and friendship

**"Project Hail Mary"** begins with the Earth facing an unprecedented crisis of solar dimming, a phenomenon that threatens to plunge the planet into a devastating ice age and potentially lead to the extinction of humanity. To uncover the cause and find a solution, scientists initiate the ambitious "Hail Mary Project." As part of this mission, Ryland Grace, a schoolteacher and scientist, is sent on a journey to an unknown star system, tasked with humanity's last hope.

(somebody's) sideNote/Book

[Mia] How to use Google Calendar API with Go: From Refresh Token to Event Acquisition

The Google API does not allow direct use of refresh_token to access the API. Instead, you must use refresh_token to issue a temporary access_token and send a request to the API using this token.

Development/DesignServer (Go/Rails)

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