This past weekend I experimented with dyeing some etched PCBs. I used Rit dye easily found in grocery stores. It was quick and dirty. I just boiled some water, mixed in a heavy concentration of black dye and let it sit for a couple of hours.
The dye worked well enough. Rather than just soaking in a cooling dye, I should have been applying a constant heat and agitating the solution in order to get a darker saturation. And when removing flux after soldering the board, dye came off as well. But in general this is a promising way to make nicer looking DIY PCB boards in the future.
From Tim H...
As mentioned at the meeting last night, my model airplane club will
have a charity airshow on June 5 and 6. We have about 15 invited
pilots from around the country that have won many championships in
various categories of RC flying.
As of the moment, we will have several aerobatic demos with aircraft
wingspans exceeding 10 feet. We have one turbine powered jet that has
a true speed of 199 mph (not scale but actual radar detector speed).
We expect to have a national champion aerobatic helicopter and a
turbine powered helicopter. Also we will have a candy drop for the
kids and an egg drop for teens and adults. (Wear an old shirt for this
When: Saturday and Sunday, June 5 and 6 11 am to 5 pm. (Saturday is
the best day b/c out of towners leave early on Sunday)
Where: Tom Sawyer Park. 1/2 mile south of Westport on Hurstbourne
Cost: suggested donation is $3 per person (Hundred dollar bills are
welcome) All proceeds go to Kosair Charities.
More info: http://wingsairshow.org/
Fox In The Moring News will broadcasting live on Friday from 5 am to 9
I have put the materials on line for the Freeduino Spring Training class if you want to take a look. In these lessons you will find sample circuits for most of the things you might want to do with your Freeduino/Arduino. All of the code examples work and are debugged. Enjoy!