Hello everyone, First time posting here, thanks in advance to anyone who can help. I'm building an HHO generator, otherwise known as a water fuel cell, or high efficiency electrolyser. The concept is to separate water using a high voltage signal at resonance instead of current. What I need to do is build a DC square wave generator that can pulse a step up transformer coil and induce high voltage discharges. I've tried building several circuits using the LM324 and 555 timer chips, but none can compare with the performance of this unknown circuit, who's waveform is shown here: http://hydrogencollective.com/PacketPulser1.mpg I think this is a modified version of the so called Dave Lawton D14 circuit, using two 555 oscillators, shown here http://students.umw.edu/~jsera9mu/wfc%20site/index.27.bmp Any thoughts on how to modify the D14 to emulate the wave in the video?