As you can see in the picture above, the 555 Timer IC has a total of 8 pins which are clearly labeled as GND, TRIG, OUT, RESET, CTRL, THR, DIS, and Vcc. But in this article, we will only discuss the IC 555 timer. The 556 Timer IC has 2 timing circuits “Dual Timer”, while the 558 Timer IC has a total of 4 timing circuits “Quad Timer”. Two other packages of the Timer ICs are available which are 556 and 558. IC 555 Pin Diagram / Description / configuration / Pinout: NE 555 timer ic pin diagramĪ standard 555 Timer IC package includes 25 transistors, 15 resistors, and 2 diodes on a Silicon chip installed in an 8-pin mini DIP ”dual-in-line package”. On the other hand, the same project can be done using the 555 Timer IC. Nobody is going to purchase such a costly circuit. But you know it will increase the overall project cost. You can easily interface the LDR and a relay module with the Arduino. Now, you can do this project using the Arduino Uno or any other controller board. Let’s say you want to make an Automatic Street Lights control system using Arduino. But there are situations when we prefer the 555 Timer IC and this is because, the 555 Time is cheap, easy to use, durable, no programming is needed, and so many other factors. It is very simple to generate delays using the Arduino Uno, Arduino Mega, Arduino Nano, PIC microcontroller, etc. I would appreciate your support in this way! I may make a commission if you buy the components through these links. The components and tools used in this project can be purchased from Amazon, the components Purchase links are given below: Without any further delay, let’s get started!!! After reading my article on the 555 Timer IC then you can resume from here. Before, I am going to explain the Time Delay Relay circuit diagram, I highly recommend reading my article on the 555 Timer IC, which covers all the basics. Anyhow, let’s continue with our original topic “ Time Delay Relay using 555 Timer”. So, if you want more control over the relay then you should read my above articles. If at any time you need to change the minutes and seconds, you can simply press the Hash “#” key on the keypad which will take you back to the main screen, and you can start again by entering the minutes and seconds. This load will remain ON until the total seconds decrements to 0. The load which is connected with the relay is turned ON. The timer is started which is based on the millis function. The user simply enters the time in minutes and seconds and press the Asterisks “*” key on the Keypad. Using this Arduino based countdown timer is very simple the instructions are displayed on the 16×2 LCD. This countdown timer is ideal for AC and DC loads. in fact, this countdown timer can be used anywhere where you need to control anything on the time basis.
With the help of this Countdown timer, you can control different types of electrical loads like for example Light Bulbs, Heaters, Water Pumps, Washing Machines, Fans, etc. This countdown timer can be used as the end product. Later, I designed an advanced version of the same project “Advanced Countdown Timer”. With the help of this project, you can turn ON anything, for more details read my article on “Control Anything on Time basis”. In my previous tutorial I designed a project “Control anything on Time Basis”, this project was based on the Atmega328 microcontroller, this is the same microcontroller which is used in Arduino Uno Board. This is the cheapest and simplest automatic relay controller circuit.Īdvanced Time Delay Relays can be designed using programmable controllers. This is a low cost and purely electronics-based project. A variable resistor or Potentiometer is used to adjust the time. In this project, I have used a Pushbutton which is used to turn ON the relay for the specified time. The Time Delay Relays can be used in hundreds of different types of electronic and controller based projects.
#Automatic timer controls relay how to#
Time Delay Relay using 555 Timer– In this tutorial, you will learn how to turn ON a relay for a specific time using 555 Timer and a few electronic components like resistors, capacitors, and diodes.
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