pumpkin-pi 🎃

Raspberry pi project that controls jack-o-lantern via servo motor and PIR motion sensors to simulate it "watching" you.

Inspired by Ryder Damen's mannequin head

• Demo
• Photos
• Wiring diagram
• Deploy
  • Docker
  • Go
• Materials
• Configuration

Demo

This project was originally built for outdoor use

Photos

Note: Holes in the acrylic case are needed for the motion sensors to properly work

Wiring diagram

Created with circuit-diagram.org. Source file is in /diagrams

Deploy

Requires following diagram above to be wired up correctly

Docker

# This script will install the dependencies and start the containers
bash -c "$(curl -sL https://raw.githubusercontent.com/circa10a/pumpkin-pi/main/install.sh)"

Go

Requires Go 1.17+

1. Install Go
2. Install pi-blaster
3. go install github.com/circa10a/pumpkin-pi@latest
4. pumpkin-pi

Materials

• Raspberry Pi (This project uses a Pi 3 Model B)
• USB Power Supply Compatible with Pi3/4
• MicroSD card with Raspbian installed (guide)
• Pimoroni pan-tilt hat
• 2x PIR motion sensors
• 2x 3D printed PIR motion sensor enclosures
• MG90s Servo Motor
  • I upgraded the horizontal motor in the pan-tilt hat due to needing more torque to support/smoothly move the pumpkin head without struggle
• Male to female, female to femaile jumper wires
• M2 Standoffs
• Jack-o-lantern (with top stem cut off)
• Acrylic display case
• Plaster column pedastal(spray painted blacked)
• 2x 5v fans for (intake/exhaust)
• Some screws here and there

Configuration

Environment Variable	Description	Required	Default
PUMPKINPI_LOG_LEVEL	Logrus log level. Use debug for more info	false	info
PUMPKINPI_MOTION_TIMES_ENABLED	Whether to use configured schedule or not. These times must be within the same day	false	false
PUMPKINPI_MOTION_TIME_START	Local time to ensure pumpkin-pi only responds after this hour	false	17
PUMPKINPI_MOTION_TIME_END	Local time to ensure pumpkin-pi only responds before this hour	false	22
PUMPKINPI_PIR_LEFT_MOTION_SENSOR_GPIO_PIN	The GPIO Pin used to read inputs from left motion sensor	false	11
PUMPKINPI_PIR_RIGHT_MOTION_SENSOR_GPIO_PIN	The GPIO Pin used to read inputs from right motion sensor	false	13
PUMPKINPI_SERVO_CENTER	The center position of the horizontal servo motor	false	29
PUMPKINPI_SERVO_LEFT	The left position of the horizontal servo motor	false	20
PUMPKINPI_SERVO_RIGHT	The right position of the horizontal servo motor	false	40
PUMPKINPI_SERVO_ROTATE_DELAY	The wait time in between each incremental servo step as it rotates	false	150ms
PUMPKINPI_SERVO_CENTER_RESET_INTERVAL	The interval at which the pumpkin will rotate back to the center position	false	5m
PUMPKINPI_SERVO_GPIO_PIN	The PWM enabled GPIO Pin used to control the servo motor	false	12