Simple Arduino Timer Switch

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Introduction: Simple Arduino Timer Switch

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About: Master in Electronics Engineering

Let's make a simple arduino switch. It is very useful way to run your devices for specific time.

Supplies

1. Arduino Uno

2. Dot matrix PCB

3. OLED 0.96' Display

4. 5v Relay

5. BC547 Transistor

6. 1N4007 Diode

7. 1Kohm Resistor

8. Push buttons x3

9. Wires

10. Connector

Step 1: Circuit Diagram:

Step 2: Library:

Download library for oled display.

Download zip file from github link below.

https://github.com/adafruit/Adafruit_SSD1306

https://github.com/adafruit/Adafruit-GFX-Library

Click on "Clone or Download" and Download zip.

To add library to arduino ide goto Sketch> Include Library > Add zip Library> Select zip file.

Step 3: Code:

Change 0x3C from the code to your i2c display address and upload.

Attachments

Step 4: Finished!

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    2 Comments

    0
    MrRais
    MrRais

    Question 2 years ago on Introduction

    Can i know how relay connected in this circuit? I mean the way of all pin in that relay.

    0
    RishabhL
    RishabhL

    Answer 2 years ago

    You can see it in circuit diagram.. Or google any sample relay circuit for your understanding.