Recently I was doing some woodworking and wanted to try fuming a small test piece of oak with ammonia. The fuming process darkens the wood and gives it a nice aged, gray look. To speed the process up, I decided…
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Blog Archives
Immersion Heating with a Vacuum Tube
Tagged with: 6v6, Ammonia Fuming, Immersion Heater, Oak Fuming, PID Controller, Therm, Vacuum Tube
Posted in Projects
Posted in Projects
Low Cost DIY Photobooth
Photobooths are popular at many types of social events, including weddings, birthday parties, and school dances. However, renting one can easily cost upwards of $1000, making them impractical for many events. So when a friend mentioned wanting one for her…
Tagged with: Arch Linux ARM, BeagleBone Black, DIY, Dymo 400, Gphoto2, ImageMagick, LED, Linux, Luma, Photobooth, Photography, Python, QR Code, Thermal Printing, Twitter, twython
Posted in Linux, Projects, Python
Posted in Linux, Projects, Python
Luma Controller Development
The Luma Controller takes any audio input, calculates and analyzes a FFT of the spectrum, and sends commands out to a network of Luma nodes. This board duplicates the functionality of our music analysis software, but with greater flexibility and…
DIY Vacuum Tube Amplifier
This past winter I designed and constructed a stereo vacuum tube amplifier based off of the TubeLab SimpleSE design. Since many people asked about it at Maker Faire Detroit, I thought I would post a link to the build photos…
SSD1306 and Python with the BeagleBone Black
The SSD1306 is an OLED display made with SPI and I2C interfaces. With a simple Python library I adapted (a modified version of py-gaugette), it is easy to render text, images (from bitmaps of pretty much any format), progress bars,…
Next-Generation Luma Nodes – Build Timelapse
The next iteration of the Luma node has been fabricated and assembled! The new node incorporates 3 10W RGBW LEDs, controlled with constant-current buck drivers and an ATTINY2313 microcontroller. Like all Luma nodes, up to 32 nodes can be daisy-chaned…
RJ-45 Breakout
Commonly confused with RJ-45, the 8P8C connector is generally used for ethernet, telephone, and serial communication-type applications. The RJ-45 Breakout board breaks out an 8P8C connector into screw terminals for easy access while prototyping projects. The small form factor and…
Open Hardware USB to RS485 Adapter
While developing the Luma RS485-networked LED driver we discovered a need for a small and inexpensive USB to RS485 adapter. We designed an adapter with a FTDI basic UART chip (FT230XS) and an inexpensive TI differential receiver (SN75176). Our small…
Open Hardware Pogo-Pin Programmer
The ProtoProg is a small open source hardware pogo pin programming solution. The ProtoProg does not need a physical connector on the board, it uses surface-mount pads for signals and thru-holes for alignment. Two standard footprints are available, the smallest of…
Tagged with: AVR, ICSP, Open-Source Hardware, OSHW, Pogo Pin, Programmer
Posted in Projects, ProtoProg
Posted in Projects, ProtoProg
PicoBuck RGB LED Driver
The PicoBuck is a small and inexpensive 3-channel LED driver. It employs constant-current buck driving which approaches an efficiency of 95% (theoretical). Now available from SparkFun Electronics!