Hi. I know of the commercially available "battery-less" flashlights that use either squeezing or shaking mechanisms to generate electricity. I was wondering, however, whether I can create one that uses the difference of temperature between the hand and the room temperature. I propose to use a LTD stirling engine to drive a magnet inside a coil of wires to generate electricity. My question is, can a carefully constructed stirling engine with the size of this: (cylindrical, 10cm in diameter, and no longer than 30m in lenght), be powerful enough to generate electricity enough for 1 or 2 high output LEDs to light up? If it can, can someone guide me to building this stirling engine? I'm hoping to get an university professor to help me and I can access the school's metalshop's lathe and welding machines and grinders and others. So please respond. Thank you very much. I am also trying to build a Stirling-Stirling refrigerator. I propose to drive the first stirling using the heat from concentrated sunlight, which powers a second stirling to achieve cooling. I hope to get this machine to be able to make ice. I have a question about the stirling cycle cooling though. I want the stirling engine to be able to cool an area of 10cm x 10cm x 10cm. I know that a small gas compression chamber can yield better results, so how do I go about cooling that area? Should I just attach the cooling area outside the cooling gas chamber? Can I achieve a 0 degrees celsius cooling with a stirling built from scratch?