555 Timer Circuits

All the colors can be made from Red, Green and Blue color (RGB), these are the basic three colors from which we can generate any color. By varying the amount of these three colors, many colors can be generated. In case of light, we can produce any color of Light by using the three basic lights i.e. Red, Green & Blue and varying the intensity of these three light. So our…

Bistable Multivibrator mode of 555 timer IC is the easiest mode of 555 timer IC, where Monostable multibrator mode has one stable & one unstable state, Astable multvibrator mode has both the unstable states, here in Bistable mode, both the states are stable. Means it remains in the same state (either HIGH or LOW) until an external trigger is applied; otherwise it stays…

Astable Multivibrator mode of 555 timer IC is also called Free running or self-triggering mode. Unlike Monostable Multivibrator mode it doesn’t have any stable state, it has two quasi stable state (HIGH and LOW). No external triggering is required in Astable mode, it automatically interchange its two states on a particular interval, hence generates a rectangular waveform.…

Monostable multivibrator (MMV) mode of 555 timer IC is also called Single shot mode. As the name indicates, only one state is stable and the other one is called unstable or quasi stable state. 555 timer IC remains in Stable state until the external triggering is applied. An external triggering is required for transition from Stable to unstable state. 555 IC automatically…

Object counters or product counters are important applications used in industries, shopping malls, etc. They count objects or products automatically and so reduce human efforts. In this tutorial we are going to design a simple object counter circuit without using any microcontroller.

Often we need stopwatch to differentiate the time of two events. Here in this tutorial we are going to design a simple digital stopwatch circuit, without using any microcontroller. Here we have used the popular 555 timer IC, CD4033 ICs and few other components, which are listed below.

Toggle switch is used to toggle the output between two devices. Means when one device is ON, second device remains OFF and when second device is OFF, first device becomes ON. This toggle of output can be controlled using a PUSH button switch, so you can control two devices using one button. Further you can interface two Relays in place of LEDs to control the two AC…

Dice can be used to play several games, such as Snakes and Ladders, Ludo, etc. Generally, dice are made of wood or plastic, which gets distorted over time and becomes biased. A digital dice circuit is an alternative to the traditional dice; it can’t be biased or distorted, and it acts so fast that nobody would be able to cheat.

This guide will explain how to build a digital dice circuit…

Digital counters are needed everywhere in this digital world, and 7 segment display is one the best component to display the numbers. Counters are needed in object/products counters, digital stopwatches, calculators, timers etc. To use the 7 segment with ease, there is a 7 segment driver IC which is IC CD4026, so we are building 7 segment counter circuit using 4026 IC.

Dancing LEDs circuit is used for decorative purpose and looks very good when these LEDs glow in sequential manner. We can create many kind of Dancing LEDs patterns for decoration. In this particular circuit, we have created a pattern in which 6 LEDs are illuminating in forward and reverse order. To create this circuit we have mainly used 555 timer IC and 4017 IC.

H-bridge is the circuit in which voltage can be applied across the load, in either of the direction. These circuits are frequently used in robotics, especially for the DC motor. Voltage can be applied in either direction to rotate the DC motor forward or backward. DC motor further move the robot or any robotic system, forward or backward.

You must have seen different kinds of decoration lighting patterns. In this LED chaser circuit, we have created an interesting LED blinking pattern by using a 555 timer IC and Counter IC CD 4017.