Note: The key to this project is the delay. You could just wire the horn to the button and I am sure you would get a lot of people to jump. Add a delay to the horn and when they turn their back, the real fun begins! Honk!
You can find this build on the MAKE blog, along with other really cool Halloween projects and contests.
Step 1: What you need
- Pumpkin - Real, plastic or foam
- 12Volt battery
- Car horn - $7 at local car shop or junkyard
- Buttons and/or switches
- LEDs - Any color, but I like orange
- Heat shrink tubing
Tools you need:
- Soldering Iron
- Pumpkin cutting/carving supplies
- Glue gun
Step 2: Cut/Carve up the pumpkin
You can use a real pumpkin, but I picked this one up for $5 at a local craft store. Using a real one is fine, but photographing it over a few days can get messy so I decided to use a foam version.