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.

I put these pdf's put on a USB stick and printed them off at Staples on their high end printers and paper. Print 10 consecutive in a row, so you have a cheap color reference. It does not replace pro stuff, but it is more than enough for my image processing development work.

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 also 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 none have links to drawings.

So, I drew a diagram with dimensions to scale 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