Authors: Mrs. Amruta S. Dixit, Mrs. Aditi A. Prabhune
Abstract: An IC constitutes area of microelectronics in which many electronic components are combined in to high density modules. IC’s, the main component of each and every electronic circuit can be used for wide variety of purposes and functions. IC consists of active and passive components such as resistors, capacitors, transistors on single chip which reduces size of system, power consumption and cost of overall system. But sometime due to faulty ICs the circuit doesn’t work. It is lot work to debug the circuit and confirm whether the circuiting is creating problem or the IC is faulty. So the proposed project is designed to confirm whether the IC under consideration is properly working or not. The proposed project can be used to check the IC’s of 74 series at gate level. The digital integrated circuit (IC) tester is implemented by using the microcontroller PIC 18F4550. The microcontroller processes the inputs and outputs and displays the results on a Liquid Crystal Display (LCD). The basic function of the digital IC tester is to test a digital IC for correct logical functioning as described in the truth table and/or function table. The designed model can test digital ICs having 14 or 16 pins. Since it is programmable, any number of ICs can be tested. This model applies the necessary signals to the inputs of the IC, monitoring the outputs at each stage and comparing them with the outputs in the truth table. Any discrepancy in the functioning of the IC results in a fail indication, displays the faulty and good gates on the LCD. The testing procedure is accomplished with the help of keypad keys present on the main board design. The test has been accomplished with most commonly used digital IC's, mainly belonging to the 74 series. The design is flexible. We can add extra ICs and subroutines to test any other IC in the 74 series.
Keywords: IC tester, microcontroller, LCD, keypad, 74 series, gatesFull Issue
| View or download the full issue | PDF 1-12 |