Photolithography is used in various fields such as printed circuit board fabrication and semiconductor processes,and it is often adopted in science education classes. For student to make printed circuit boards which have varyingdesigns, in a classroom, efficient exposure time is required; however, this is difficult to achieve because of cost andtime limitations. In this research, we have developed mask-less exposure equipment for high quality printed boards at low costwith a short exposure time by using a commercially available DLP projector. Furthermore, this process is alsoapplicable regarding micro-patterns.