Take one old satellite dish and a pile of CDs for whatever old software you have filling your drawers. Bolt the CDs to the mesh of the dish. Voila: a solar stove capable of 425 °C (797 °F). These pictures show a temperature of 400 degrees. This is adequate for my uses. In an earlier experiment I had CD's covering every available square inch of the surface of the dish. It produced over 425 °C (797 °F). More that I needed for cooking. Do not try to retrieve anything from the focal area without a leather glove on.
- Satellite dish