reef-pi is an open source aquarium automation system that runs on a raspberry pi. This build uses a custom designed hat that makes it super easy to build. It supports 16 outlets, 2 ph probes, 3 temperature sensors, 2 ATO sensors, and 2 lights with 3 channels each. I also made a 5 foot light […]
I have 2 printers; 1 is for documents, the other is for PCBs. The Brother printer is great, but I just couldn’t get it to work well with toner transfer sheets. The toner just wouldn’t adhere cleanly, resulting in smudges, spots, and pinholes. I got a second hand HP printer that works great with toner transfer […]
The first bandsaw box was a lot of fun to make, so I decided to try making another one, but this time with a more traditional style. It started life as an oak or maybe old pine board in the scrap pile at HackRVA. I cut it down to size and glued it up into […]
I’ve wanted to try making a bandsaw box for quite some time now. I had a branch that I cut from a holly tree in my back yard that I thought might look pretty cool as a box, so I spent about 3o minutes cutting this on the bandsaw at HackRVA. It was a fun little […]
We knew we wanted to teach people how to solder at RVA MakerFest. Estimates put the need at anywhere from 20 to 300 badges. We looked at various kits, but without knowing how many people we’d be teaching, they were simply too expensive, too complex, or not available in the needed quantity. As the date […]
This was a quick hack to automate a RO/DI water filtration system.
This project started off as a few scraps of poplar, purpleheart, and jatoba. The original intention was to create a candle holder for 3 votives. I started by cutting the wood into different sized strips and just layout them out next to each other to come up with a pleasing pattern. After finding a balanced […]
The linear regulators converted a lot of energy into heat instead of light, so a new current driver design is in order. The CAT4101 driver is getting replaced by a switching buck regulator to improve efficiency. This change also presented an opportunity to change the voltage source for the system from a recovered ATX PSU […]