Think Big Conference Sketch Iterations

For the second round of sketches I created 40 iterations of the best-chosen thumbnails from round one. I created these with micro pens to create more contrast and visibility for the presentation. I wanted to keep the design simple and readable. 

I used a variation of windmills, power plugs, suns, and panels while trying to execute the best logo for the Think Big Solar Conference. I decided to create a variety of ideas revolving around circle layout to keep simplicity within the design.