Concept
This circuit demonstrates a simple, hands-free switch mechanism built using copper tape and Arduino Uno. The switch is activated by proximity without requiring mechanical pressure, enabling interaction with a system without physically pressing a button. The copper tape acts as a capacitive touch sensor, using a Newton’s Cradle as part of the physical interface.
Video
Materials
- Arduino Uno
- Breadboard
- Copper Tape
- Jumper Wires
- Newton’s Cradle (for physical interaction mechanism)
- LED
- Resistors (330Ω)
- USB Cable
Setup
The circuit is composed of a basic LED switching system. Instead of using a traditional push button, the switch is implemented with two strips of copper tape placed strategically on the Newton’s Cradle to detect contact.
- One wire connects the copper tape to a digital input pin on the Arduino.
- The other strip connects to ground (GND).
- When a person touches or closes the circuit by interacting with the Newton’s Cradle, the circuit registers a state change.
Based on this input, the LED turns on or off, simulating a touch-activated switch.
I am happy with the result; Newton’s Cradle never fails to make something engaging.