The infamous Apache2 “You don’t have permission to access / on this server” error started appearing after I updated my Mint/MATE system (Ubuntu) to version 17 (14.04). It is fixed by editing /etc/apache2/apache2.conf. Details in this article.
Category: Technical
The care, feeding, and breeding of PayPal on your web site
As of today, 20140712, this tutorial actually works for collecting PayPal sales data after your web site visitor uses the PayPal button.
Solar Power
Current guess at specifics of powering your house with soar cells. Calculates number of cells needed, area they would occupy, and cost of cells at street prices.
New MSP-430G2 Launchpad sketch
I converted the Knight Rider digital output test for TI. See it here: http://jdnash.com/api-makers/launchpad/
New Arduino Sketch
Added a sketch for testing arduino digital inputs 2-13. Released into Public Domain. See http://jdnash.com/arduino/