Simple Arduino Timer Switch

About: Electronics & Telecommunication Engineer

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

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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.

Step 4: Finished!

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