New Additions

X-Rite Color Chart Clones

"Real" X-Rite color charts ($80) are used by professionals for color management on monitors, cameras and printers.

X-Rite Color Chart Clone in PDF

X-Rite Color Chart Clone in PDF With Color Names & RGB Values

These 2 clones pages can be used as a calibration chart for photogrammetry.

• The color blocks are 1.25" x 1.25" squares with a 0.125" space between the blocks.
• The entire chart is 8.625" x 5.875".

Accurate Scaled Gothic Arch Drawing

There are many videos on youtube on building the gothic arches for a gothic arch greenhouse, but the math and geometry are poorly explained. So, here is a diagram with dimensions and labels in PDF file format.

PDF allows the accurate printing of lengths, so if you print it at exactly 100% scale, you can use a metric ruler to read off dimensions.

DNS

Domain Name System Developer Notes

Software Defined Radio Notes

Receiving, decoding and displaying weather data from a WT440 Wireless Weather Transmitter

C code for Cairo Text Justification