Maxitronix 75-in-One Electronic Project Lab Electronics Projects, Diy Electronics, lab style, illustrated manual Brought to you by Elenco Electronics,Each project lab comes with an owner's manual that begins by explaining the included components and the fundamentals of reading schematics and building circuits Maxitronix 75-in-One Electronic Project Lab : Amazon.com.au: Toys & Games. 75-IN-ONE Electronic Project Lab. Model MX-905. • Easy-to-read, illustrated, lab-style manual included. • Learn basic principles of electricity, electronics MX-905 75 in 1. PROJECTS. I. BASIC SEMICONDUCTOR AND COMPONENT CIRCUITS. 1. Resistors in Series and Parallel. 9. 2. Switching Circuit.