This work discusses the design, construction and operation of a low cost farm scale digester in which animal wastes were used. The biogas produced contains about 65% CH4 by volume. Production quantities and qualities were measured for a period of more than six months, both in summer and in winter. Biogas was used in two different systems: an instant gas water heater was used to generate hot water for farm use, and a modified piston engine driving an electrical generator of one phase, one kW output was fueled directly by the gas. Operation of both systems was satisfactory. The unit is being used to demonstrate the technology for potential users such as farm owners.