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Tire Pressure & The Polar Vortex in Jupyter Python
05 February 2023
I had low tire pressure yesterday due to the polar vortex, so I added
additional air to my tires to about 34PSI at 22F, today it is much warmer at
nearly 50F and the PSI went up more than I expected. Also the PSI doesn’t seem
to change as much from Spring to Summer, when the weather can swing up more
than 20 degrees from night to day. I decided to write some python to try to
figure this whole thing out using the Ideal Gas Law. Also no attempt was made
to account for the weight of the car, and how that adds pressure to tire.
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Implementing a Table Create & View Update in Athena using AWS Lambda
01 February 2022
I have a DynamoDB table that is automatically exported as JSON to
compute some reports. I wanted to automate the table creation process
and load steps. Amazon Athena allows querying from raw files stored on
S3, which allows reporting when a full database would be too expensive
to run because it’s reports are only needed a low percentage of the time
or a full database is not required. It’s billed by the amount of data
scanned, which makes it relatively cheap for my use case.
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Search Suggestions on My Website
27 July 2021
I previously talked about the search engine I recently added to my
blog, and this is an extension to that previous post. Here I will
discuss how I added a simple search suggestion option. It works for my
website with the limited vocabulary and time to return results, but if I
was working on a larger site I might try to make it smarter. So here’s
how I implemented it.
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Adding Search to My Static Blog Using AWS Lambda and SQLite
09 July 2021
I always wanted to have search on my site, but it’s statically hosted,
so I can’t have any dynamic content on it. I recently resolved that by
creating a little tiny lambda function on AWS that queries a SQLite
database hosted on S3. Here I’ll walk you through how I created the
back-end for it, and in some later posts I’ll include details on
calculating the cost.
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Adding `pylint` to your Github Actions flow
21 January 2021
Recently, I’ve been doing more CICD work, so I wanted to practice adding
some of that to my personal projects. I’ve also taken a liking to
pylint, so I decided to have Github Actions automatically
check my code quality on push for my log-analysis
repository. This is how I added that linting to my workflow.
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PyGame FFT Audio Visualizations
07 January 2021
This tutorial is to write a very simple audio visualizer using
PyGame, PyAudio, and Numpy. The visualization uses the
frequency domain of some input sound, and display a bar graph of the
frequency domain as the audio plays. The audio source is the computer
line-in or microphone.