Module Nine and Module Ten Electronics Training Circuit Boards

Two electronics training circuit boards, Module Nine and Module Ten. Module Nine has an oscillator circuit built around IC91. Module Ten covers Encoder, Decoder, and Mux circuits. IC chips included: SN74LS148N, 74LS138N, SN74LS153N. Schematic diagrams printed directly on the board surfaces. Gently used with minor surface wear and some oxidation on metal components. Boards are intact and all labeled traces and component positions are readable. Sold as a pair. 4892 41