Based on the data from the ” Pi of the Sky ” project we made a catalog of the variable stars with periods from 0.1 to 10 days . We used data collected during a period of two years ( 2004 and 2005 ) and classified 725 variable stars . Most of the stars in our catalog are eclipsing binaries - 464 ( about 64 % ) , while the number of pulsating stars is 125 ( about 17 % ) . Our classification is based on the shape of the light curve , as in the GCVS catalog . However , some stars in our catalog were classified as of different type than in the GCVS catalog . We have found periods for 15 stars present in the GCVS catalog with previously unknown period .