Understanding of IC555 Timer and IC 555 Timer Tester
Himani Goyal
Dr. Himani Goyal, Dean, Department of Electronics and Communications, M.L.R Institute of Technology, Dundigal, Hyderabad-43 Telengana, India.
Manuscript received on December 01, 2014. | Revised Manuscript Received on December 09, 2014. | Manuscript published on January 20, 2015. | PP: 4-6 | Volume-3 Issue-2, January 2015. | Retrieval Number: B0575013215/2015©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: As 555 timer is robust, stable and most commonly used IC in the area of electronics and also use in many electronic circuits. IC 555 is a square wave generator and its duty cycle range from 50% to 100%. The time delay in the circuit is provided by an oscillator. 555 timer IC got its name from the three 5 kilo-ohm resistor attached as a pattern of voltage divider as shown in the below figure. While in the full circuit 555 timer IC consists of many other components via 16 resistors, 20 transistors and 2 diodes also included flip-flop.
Keywords: ic technology,ic555 timer,ic555 timer tester