(using NAND & NOR gates) The instrument has been designed to construction & verify Truth Tables of 'AND', 'OR', 'NOT', NAND & 'NOR' gates using Universal gates i.e. NAND gates & NOR Gates. Consist of IC regulated built in 5V DC power supply. Provided with NAND Gates(4 Nos.), NOR Gates (4 Nos.) & housed in PVC cabinet, circuit diagram printed, series) connections of various gates, 2 Nos. of logic inputs (0&1), 2 Nos. of output indicators & test points brought out at Glass epoxy (PCB) front panel.