Flite Test FT Racer

Flite Test has some great scratch build RC airplane designs and amusing videos to boot.

I built their "FT Racer." It was simple to build and have been very pleased with the results. Check it out...

cobra18t build of the FT Racer

Numato.cc has another great Give Away!

Numato.cc is having their 2014 Mega Give Away. You could become the proud owner of one of the many electronic boards they offer. They extended the deadline to this Saturday, get in while you still can!

original post:
http://numato.cc/content/mega-new-year-give-away-2014-grab-your-surprise-gift

update with extended deadline:
http://numato.cc/content/mega-new-year-give-away-2014-list-participants

KNSU Rocket Motor Test with 3D Printed Nozzle Mold

I successfully fired a static test of a KNSU propellant motor. I had it set up to measure the resulting thrust with a load cell and FubarinoSD.

3D Printed Rocket Nozzle Mold

I have tinkered with small PVC rocket motors using sugar fuels in years past thanks to information posted by Richard Nakka, Dan Pollino, and Jacob's Rocketry. The frustrating part of the build, particularly for smaller diameters, was the nozzle. After building a 3D printer, it was time to print my own nozzle molds.

Nozzle molds on print bed.

BasicSDAudio Alpha Release and Demo

I have posted an alpha release of the BasicSDAudio library on GitHub! Check it out here. It is capable of 78125Hz stereo PWM audio outputs read from an uncompressed RAW file on an SD card. Psuedo 16bit playback should also be possible.

Also, here is a quick demo of the library running with my BabyBOOMER amplifier/buffer/filter prototype at 78125Hz, 8bit, mono output:

Testers and collaborators are welcome. Future improvements to the library include:

1. test stereo pseudo 16 bit playback
2. test higher output frequencies
3. auto called worker routine
4. efficiency improvements
5. multiple simultaneous file playback?

RAMPS 1.4 Now Available for $65!

Head on over to the Store and order one today. Any questions? Ask them in the comments section here. 

Note that we can only ship to US customers at this time.

Wine Bottle Hydroponic Planter Tutorial

For Christmas every year, we pick a hand-crafted gift to give to everyone...family, friends, coworkers, the ladies at the sandwich shop...everyone.

Our Yuletide production line was cranking out a fun one this past year, Wine Bottle Hydroponic Planters. Follow these instructions to make your own!