Two Input Nand Gate

Diode mounted on transparent covered base for maximum visibility to students. Two four mm sockets one red and one black are provided for easy connections.

Bridge rectifier is designed with four LED’s internally arranged in bridge pattern fitted inside a plastic moulded case. Two LED’s are red and two LED’s are green. This device is used to demonstrate the functioning of a bridge rectifier, i.e., to convert alternating current (AC) into direct current (DC). Two yellow sockets are used for AC input. Two sockets, one red and one black, are used for DC output. For the easy understanding of the internal circuitry, the circuit diagram is printed on the box.

To demonstrate the function of operational amplifier using TL081 and L272 with discrete components different value of resistors, capacitor. Input can be applied from microphone, LDR. Offset null control is also provided. Output can be fed through the power amplifier into a loudspeaker.

Trainer consisting of Power Supply of +5 V / ±12 V (each of 250 mA), Silicon, Germanium diodes, Zeners, PNP and NPN Transistors, FET, One speaker, 12 different values of carbon film resistances of ¼ W, ½ W and 1 W. 12 assorted values of capacitors from 100 pF to 1000 ?F, Integrated Circuit (IC) Base and IC 74LS00 1 No. each. LED, LDR, Photo diode, Solar Cell Logic Switches (4 No.) and LED Indicators (4 No.) etc., 2 mm Interconnection Leads -10 No. and Comprehensive User’s Manual