Some notes on PWM on the Raspberry Pi

Tue 26 September 2017 by Lars Kellogg-Stedman Tags raspberrypi pwm

I was recently working on a project in which I wanted to drive a simple piezo buzzer attached to a GPIO pin on a Raspberry Pi. I was already using the RPi.GPIO module in my project so that seemed like a logical place to start, but I ran into …

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Ansible for Infrastructure Testing

At $JOB we often find ourselves at customer sites where we see the same set of basic problems that we have previously encountered elsewhere ("your clocks aren't in sync" or "your filesystem is full" or "you haven't installed a critical update", etc). We would like a simple tool that could …

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Better bulk filtering for Gmail

Fri 07 July 2017 by Lars Kellogg-Stedman Tags gmail

I use Gmail extensively for my personal email, and recently my workplace has been migrated over to Gmail as well. I find that for my work email I rely much more extensively on filters and labels to organize things (like zillions of internal and upstream mailing lists), and that has …

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OpenStack, Containers, and Logging

Wed 14 June 2017 by Lars Kellogg-Stedman Tags openstack logging

I've been thinking about logging in the context of OpenStack and containerized service deployments. I'd like to lay out some of my thoughts on this topic and see if people think I am talking crazy or not.

There are effectively three different mechanisms that an application can use to emit …

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FAA Cannot Require Drone Registration

Thu 25 May 2017 by Lars Kellogg-Stedman Tags uav faa

This is now old news if you're already following the drone industry, but if you're not, I'd like to highlight a recent decision made by the US Court of Appeals regarding the FAA's drone registration requirements.

To place this in context, back in 2015 the FAA established a new set …

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