Building an ambient conditions sensor with a Bluefruit Sense board.

Building a portable ambient conditions sensor

This post describes how I put together a bluetooth connected ambient conditions sensor using a microcontroller and CircuitPython. Although this device can be used to monitor ambient conditions anywhere, I built it with a specific purpose in mind: monitoring temperature and humidity inside plastic containers storing 3D printer filament spools. Some 3D printer filaments are very susceptible to high humidity conditions (e.g. ABS) and can quickly degrade. Manufacturers recommend to keep them in areas with humidity conditions below 50% and ambient temperature not exceeding 30 Celsius....

February 4, 2022 · 4 min · L.R-S
Wireless split mechanical keyboard

Building a Wireless Split Mechanical Keyboard

Background A few months ago I started looking for ways to alleviate the wrist and shoulder pain I’ve been dealing with for a long time. I adjusted my home office desk, chair and computer monitor to be as ergonomic as possible. I did some research on ergonomic computer peripherals and tried out several of them. It didn’t take me long to land in the fascinating and addictive world of mechanical keyboards....

August 29, 2021 · 5 min · L.R-S
HomeKit Connected Fence Door Monitoring System

HomeKit Connected Fence Door Monitoring System

Summary The objective of this project is to create a solar powered, HomeKit connected outdoor fence door monitoring device. Once setup, the door’s state (i.e. open/close) can be monitored and used in automations within the HomeKit ecosystem. I’ve been using it for months now, and it has been working really well. See below a video of the system in action. This is not a difficult project, but there are several moving parts associated to it, so I’ll try to be thorough in the following sections....

June 23, 2021 · 9 min · L.R-S
3d Printed Tripod

3D Printed Desktop Tripod

Some months ago, I started looking for a desktop tripod to support an LED panel to be used as primary light on conference calls. Although there are many options on Amazon, none of them was exactly what I was looking for. My favorite tripod (Peak Design Travel Tripod) can be configured as a Desktop tripod, but its footprint is just to wide to be used on a regular desk. I decided to give it a try and design and print my own desktop tripod....

November 22, 2020 · 2 min · L.R-S
Seeed Wio Terminal

Wio Terminal - All In One Microcontroller

The people at Seeed Studio have been busy working on a bunch of new devices. From IoT microcontrollers and development boards to Mini PCs running Windows and machine learning devices. They were kind enough to send me their new Wio Terminal to use it in one of my future projects, but since that will take a while, I just wanted to write a quick post about it. This device would be the equivalent of an All-In-One computer, at a microncontroller scale....

August 30, 2020 · 3 min · L.R-S