DIY aquarium lights

Buy a new aquarium, and you often get hood lights that are ... meh. They're good enough, but not great.

There are plenty of high-quality replacement lights out there, but none of them had the nice, low profile of the plastic covers that came with this tank. So I decided to spruce up the existing illumination with some DYI lights — and even make them programmable with an Arduino.

That was more than a year ago. Now in coronavirus isolation, I finally made it happen.

Here's how.

Tracking Harlem's Heat with Sensor Journalism

harlem_heat_ba_Credit-JohnKeefe-WNYC

How hot is a Harlem apartment?

We're trying to find out.

There are now DIY sensors in about 20 apartments, measuring the indoor heat and humidity -- in the middle of a heat wave.

It's the latest sensor journalism project from WNYC's Data News Team, in a collaboration with blog AdaptNY, community group WEACT and observation platform ISeeChange

And this week we worked with maker space HackManhattan, which hosted a soldering party to build more sensors.

Book Making: Done

Between the last post and this one, I made a book!

Family Projects for Smart Objects is a collection of 11 projects based on Arduino hobby computers. They’re DIY activities designed for beginners who want to learn about sensors and make “Internet of Things” things.

Or just make stuff with people you love.

The book is currently with a team of designers who are working to make it beautiful, useful and fun.

Game plan is to publish in time for the World Maker Faire in New York this fall. If you’d like a note when it’s published, just jump onto my mailing list.

Ridiculously, that’s not all I’ve been doing. More posts ahead about cool (and hot) things I’m exploring at work and on the side.



Make Every Week: Distance Sensor Demo

I stumbled on a fun, visceral way to show how Arduinos can sense and respond.

In preparation for a presentation at the Online News Association Conference in Los Angeles, I grabbed a Ping distance sensor I had in a bin. The Ping works like a bat — it emits an inaudible, high-frequency sound, and listens for the sound to bounce off an object. The round-trip time between ping and reflection reveals the distance.

Monitoring the Monongahela

Yesterday the Streamlab class put do-it-yourself water monitors into Gatorade bottles and anchored them in the Monongahela River near Morgantown, West Virginia. They’re now texting their data readings live.

The link to the live chart is here, and the raw data is here.

We’re sensing conductivity, which is a good indicator of dissolved solids in the water, and temperature. The locations are: upstream of an industrial site, downstream of the same site and further downstream below the Morgantown lock and dam. 

Make Every Week: Message From a Bottle

A summer of tinkering has culminated with a conductivity and temperature sensor that texts its data from inside a Gatorade bottle.

The contraption consists of a Riffle, which is an Arduino-like board designed to fit through the mouth of a water bottle and a Fona cell-phone board. And a bottle.

The plan is to submerge several of these along a stretch of the Monongahela River as part of a sensor-journalism class at West Virginia University. It’s a work in progress, but you can [see how things are going]. My job was to build a working conductivity sensor that would report its findings live. Here are the components and how I made it go.

Update: We actually deployed some of these sensors in a river!