Lightning Detector Build

The basic design came from an online tech library and I designed an add-on circuit to interface with my home automation system. I have been using this for many years to warn me of oncoming storms and when to ground my ham radio antennas, There are many add-ons which can be used with the basic circuit including meters, LEDs and alarms. This is the link I talk about in the video.
http://techlib.com/electronics/lightning.html