The objective of this research is to develop digital and training equipments to be used as teaching aids in elevtronic laboratory. The developed equipments will be a prototype for further production. These are digital circuit training system, logic probe, logc monitor, pulse generator, microprocessor training system, EPROM programmer and eraser. The principle of the design is to achieve a simple, low cost and efficient equipement. All of the designed equipemnts are being using in electronic laboratory of the Department of Electrical Engineering, Chulalongkorn Univeristy.