DIY Ultrasonic Pest Repeller (With Optional Motion Sensor)

Protect your home, garage, or shed from pests with this hands-on DIY guide! Learn how to build a smart ultrasonic pest repeller using basic electronics and an Arduino. This fully illustrated PDF walks you through every step — from wiring a piezo transducer to adding motion detection, tuning ultrasonic frequencies, and even customizing your device with lights, buzzers, or remote control.

Whether you’re a hobbyist, homesteader, or just want to keep mice and bugs away without chemicals, this project is fun, functional, and highly effective.

What’s Inside:

• Full parts list with beginner-friendly options
• Step-by-step wiring diagrams and sample code
• PIR motion sensor activation (optional)
• Adjustable frequency pulses (35–45kHz)
• Custom housing ideas: stealth box, tower, portable rig
• Troubleshooting tips and upgrade mods
• Printable reference card for your final build

No advanced skills required — just a curious mind and a few cheap parts!