Abstract: The invention is a rotational sensor to sense an object's angle and methods to analyze the sensor output. The sensor has a first emitting source, to either emit onto, or from the object, a first receiving sensor, to receive emissions from the first emitting source, either directly or indirectly, the emissions received dependent on said angle, first receiving sensor outputting a first signal a course measurement of the angle. Also present is a second emitting source, to emit onto, or from the object and a second receiving sensor, to receive emissions from the second emitting source, either directly or indirectly the emissions received again dependent on said angle, second receiving sensor outputting a second signal, as a fine measurement of the angle. A method of use of the sensor is disclosed together with a method of combining the fine and course measurements to output a signal with zero error.

Abstract: The invention is a rotational sensor to sense an object's angle and methods to analyse the sensor output. The sensor has a first emitting source, to either emit onto, or from the object, a first receiving sensor, to receive emissions from the first emitting source, either directly or indirectly, the emissions received dependent on said angle, first receiving sensor outputting a first signal a course measurement of the angle. Also present is a second emitting source, to emit onto, or from the object and a second receiving sensor, to receive emissions from the second emitting source, either directly or indirectly the emissions received again dependent on said angle, second receiving sensor outputting a second signal, as a fine measurement of the angle. A method of use of the sensor is disclosed together with a method of combining the fine and course measurements to output a signal with zero error.

Abstract: This invention is a collaborative funding system which allows many people to work together to fund a project or to purchase a product or service. A computer system offers services to users, typically over the internet. Users may enter a new product into the system, contribute to a fund for buying a particular product or quote a product to sell it to other buyers. Once a product is quoted, the system chooses the best quote and offers the product for sale to the users. Buyers' funds are held in trust until the product is furnished. The system also provides a mechanism for the seller to build the product in stages and be paid for each stage. The system allows a negotiation between buyers and seller to determine whether the product or stage is complete.