555 Timer-Ramp Generator

jojo February 28, 2010 3 Comments
Ramp Generator Circuit-using 555 Timer IC We know that if a capacitor is charged from a voltage source through a resistor, an exponential waveform is produced while charging of a capaci­tor from a constant current source produces a ramp....
read more

555 Timer Oscillator

jojo February 28, 2010 2 Comments
A voltage-controlled oscillator (VCO) using the timer 555 is shown in figure. The circuit is sometimes called a voltage-to-frequency converter because the output frequency can be changed by changing the input voltage. As discussed in previous blog posts, pin...
read more

Astable Multivibrator using 555 Timer IC

jojo June 20, 2017 15 Comments
In this article, we are explaining an astable multivibrator, often called a free-running multivibrator. An astable multivibrator can be designed using different types of components, say using transistors (and associated components) alone or by using op amps (and associated components)....
read more

555 Timer IC Block Diagram

jojo April 7, 2011 No Comments
  Block diagram for the 555 timer is given in figure. As shown in the block diagram, a 555 timer consists of two comparators (simply op-amps), an R-S flip-flop, two transistors and a resistive network Resistive network consists of...
read more

555 Timer IC Basics

jojo April 7, 2011 No Comments
The 555 timer combines a relaxation oscillator, two comparators, an R-S flip-flop, and a discharge capacitor.   R-S Flip-Flop. A pair of cross-coupled transistors is shown in figure. Each collector drives the opposite base through resistance RB. In such...
read more

555 Timer IC Pin configuration

jojo April 7, 2011 No Comments
The 555 Timer IC is available as an 8-pin metal can, an 8-pin mini DIP (dual-in-package) or a 14-pin DIP. This IC consists of 23 transistors, 2 diodes and 16 resistors. The explanation of terminals coming out of the...
read more

555 Timer – A Complete Basic Guide

jojo August 28, 2018 43 Comments
555 Timer IC-Block Diagram, Working, Pin Out Configuration, Data Sheet – A complete basic tutorial This article covers every basic aspect of 555 Timer IC. You may already know that SE/NE 555 is a Timer IC introduced by Signetics...
read more