Welcome to RAWWERKS! This site features the work of Raymond Weitekamp. I mostly make materials and music.

An Open Source Stack for Physical Science Startups

It is hard enough running a ‘hard tech’ startup. Hardware is one thing, but companies bringing physical science innovations to the world have it toughest of all. Mother nature can be a very cruel compiler. Do not abandon hope! There are many tools available to help you on your journey. As with most things in life, the best ones are (often) free. Here, I have curated a short list of open source apps and tools that have been useful to us at polySpectra. »

You Are My Angel Investor

You probably don’t know it, but you are my angel investor. This piece is dedicated to every US taxpayer — congratulations! You took a big risk and it is paying off. You didn’t get any stock, but I hope to show that you’ve created tremendous value and it is starting to return dividends. polySpectra just spun out of the Cyclotron Road program at Lawrence Berkeley National Laboratory. Cyclotron Road is a hard technology accelerator program, focused on giving first-time entrepreneurs a launchpad to build cleantech and advanced manufacturing companies. »

Additive Manufacturing Is Cheaper Than You Think

Today’s buzz around 3D printing promises a future of mass individualization, a market-of-one paradigm. The ability to make individually customized parts is a unique opportunity for additive manufacturing with 3D printers. On the opposite end of the spectrum, high-throughput manufacturing technologies such as injection molding offer the economies of scale for producing very large volumes of identical parts. But where is the cross-over point? Assuming we can make the same quality parts with either approach, there must be a lot size between one and many where the costs are equal. »

SF Cleantech Pitchfest

I gave a short presentation on my ARPA-E supported project towards paint-on window coatings at Berkeley Lab’s Cleantech Pitchfest in San Francisco on June 1, 2016. To view the entire Pitchfest with the other 5 presenters, see https://youtu.be/gMCt2f_NlEY DIY Efficient Windows: Applying paint-on coatings for energy-efficient windows Replacing millions of porous windows with energy-efficient versions in older buildings and homes can be prohibitively expensive. Berkeley Lab’s Raymond Weitekamp, a Caltech PhD, has a new approach: an inexpensive, paint-on, energy-efficient coating that can be applied simply and evenly without the help of a professional—while the windows are still in place. »

What is Structural Color?

Our everyday sense of color is based on the absorption of light. If our shirt appears red, a dye or pigment is absorbing all of the colors except for red. By contrast, structural color is based on reflection, not absorption. Structural color is an important consequence of the fact that light is a wave. We can define the color either through the wavelength — the physical distance between the repeating crests, or the period — the amount of time for the wave to repeat. »