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=Quantum Tunnelling Compound (QTC)= QTC Pills change from an insulator with an extremely high resistance to a conductor with a very low resistance as a direct result of applied pressure. QTC comes in a variety of formats, including sheet, cable and small rectangular 'pills'. It can be used in low power applications where a change in resistance is required to control the function of an electrical system. For example, the speed of small DC motors in model cars can be directly controlled without the use of electronics. The material is cheap, easily available and crying out for innovative applications in new products.

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