DIY Halloween Pumpkin Using Arduino

It’s time to get ready for Halloween! We’re going to be doing a lot of DIY stuff this month, so stay tuned. Today we are going to show you how you can make your own LED pumpkin with just a few materials. The best part? You don’t need any fancy tools or skills. All the instructions are below–get started now!

And believe it or not, these are actually PCBs. Yeah, it’s crazy but true! Let me show you what we will need and then give you the step-by-step process to make one yourself.

Everyone knows how excited we get around here when it’s time to celebrate Halloween! Lots of DIY crafts and decorating are happening. If you want an easy way to make your house or yard festive, check out this tutorial on making your very own LED pumpkin. I think they’re so cute.

DIY Halloween Pumpkin PCB Video Tutorial

In this video, we’re going to be making some cool DIY stuff for Halloween, so get ready! Today we are going to be talking about how you can create your own LED pumpkin with just a few materials.

I will be giving you complete instructions including the circuit diagram, PCB files if you want to make a PCB, and complete quotes to make one yourself.

My name is Jithin and I am super excited to teach you everything you need to know about home automation, robotics, and other fun DIY projects using Arduino and raspberry pi. If you are a true fan of all these things make sure you check out our channel. You are gonna really love it. If you want more videos like this. Make sure you subscribe to our channel by hitting the subscribe button right here.

Let’s get started.

Designing the Circuit

Design your own PCBs for your Project!

I used Altium designer to draw the circuit and design the PCB. It is a powerful tool that can be used to design and create our own PCBs for our project as well as complex and multi-layer PCBs for industrial use.

If you are a DIY Electronic enthusiast, I bet this is gonna be really useful for you guys. I have been using it for the past 3-4 years and let me tell you guys, this is amazing! You can download the Free Trial of Altium PCB Designer from here.

PCB Design Tutorial using Altium

Check out the below video to start designing your own PCBs in minutes.

Here we are in Altium designer. Input voltage is connected to the Vin pin of Arduino. The ground pin is connected to the ground pin of Arduino.

Here we connect four transistors to four PWM pins of the Arduino, which are D3, D5, D6, and D9. And 3 LEDs are connected at the emitter pin of each transistor. The collector of the transistors is connected to the input voltage. So basically these four transistors act as switches.

The next step is where we deviate from all the previous videos. Here we will be designing a pumpkin-shaped PCB where we can securely solder the Arduino, the header pins, transistors, resistors as well as LEDs.

Designing the PCB Layout

The first thing we need is the shape of a pumpkin. For that, you can draw a pumpkin using these tools or you can import a pumpkin shape saved as a DXF file. For this project, I decided to go with the second option. I will leave the link to this DXF file in the description.

To import the pumpkin go to files import and select DXF/DWG file. Browse the file and hit open. If you want you can resize the pumpkin to fit all the components. Once the pumpkin is in the right size, we can define the boat shape using this drawing. For that go to design, board shape, and define board shape from selected objects. And there we go. The board shape has been designed. Now you can arrange all the components inside this pumpkin and once you have arranged all the components you can route it.

Getting the PCB Done

I ordered PCB from PCBWay. PCBWay is a PCB manufacturer specializing in PCB prototyping, low-volume production, and neat and tidy PCB assembly and you can create a variety of PCBs with different specifications. We will look into it in a second.

To order our PCB from PCB way, go to the PCBWay website and fill in the basic board details in the instant order form. From there we will be directed to a form where we can provide more elaborate board details. Under advanced PCBs, you can customize your PCBs.

Now update the board information in the PCB specification screen. I want to give the orange color to these PCBs, so I chose the orange color for the solder mask.

In PCBWay, we can select a variety of color PCBs such as purple, black, orange, and even create transparent PCBs by selecting a transparent solder mask.

Also, I chose a black silkscreen instead of white. Perfect. On the next screen, we should be able to upload the Gerber file and submit it for review. Once the review is completed, all that is left is to add to the cart, make payment, and wait for the PCBs to arrive.

Once you get all the components and the PCB, it’s time for you to solder them together. Solder all the components onto the board and make sure to check the polarity of the components. After soldering the PCB looks like this.

Coding

Awesome right? Now all you have to do is program our Arduino. I will provide the link to the code in the description. Here, I will be using an Arduino Nano RP 2040.

int led1 = 3;   
int led2 = 5;
int led3 = 6;
int led4 = 9;      
int brightness = 0;  
int fadeAmount = 10; 

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

}

void loop() {
  analogWrite(led1, brightness);
  analogWrite(led2, brightness);
  analogWrite(led3, brightness);
  analogWrite(led4, brightness);

  brightness = brightness + fadeAmount;

  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  delay(20);
}

Get Ready for Halloween 2021

So here we go, guys. Spooky pumpkin PCBs. We hope you’ve enjoyed our LED pumpkin project and will join us next week for more of the same. In that post, we’ll show you how to make your own light-up ghost! Stay tuned for more Halloween fun times, and in the meantime get ready with some DIY projects like this one. Happy Haunting!