Smart Trash Can Auto-Open Plus Kit: Build a Touchless Bin with Proximity Beeping Like a Car Parking Sensor

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine a trash can that beeps faster as your hand draws near—no touch, no germs, just smart feedback. This kit lets you build exactly that: a sensor circuit that measures distance with the HC-SR04 ultrasonic module and controls a buzzer that increases its beep frequency the closer an object gets. It is the same principle behind a car parking sensor, now shrunk into a desktop-sized project you can complete in an afternoon.

What You'll Build

You will assemble a working proximity detection system on a breadboard. When an object is within a set danger zone, a red LED lights up; outside that zone, a green LED stays on. The piezo buzzer chirps softly at a distance, then beeps urgently as the object moves within 10 cm—ideal for a touchless bin lid or a simple security alert. Everything runs on an Arduino Nano, which you program using the included USB cable.

What You'll Learn

• How an ultrasonic sensor emits and receives sound waves to calculate distance
• Writing Arduino code to read sensor data and control outputs
• Using pulse-width modulation to vary buzzer tone and volume
• Building a conditional logic system that reacts to real-world distances in real time

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This beginner kit is designed for young makers aged 10–12 who are curious about electronics. It aligns perfectly with CBSE Class 6–8 science projects, ATL Tinkering Lab challenges, and hobbyist weekends. No prior coding or soldering experience is needed—the breadboard construction and pre-written code examples get you running fast.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project—accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.