Electricity Generation Road Project Using Piezo Sensor

Road Piezo Electricity Generator — Portable Demo Unit This compact science project converts footstep and vehicle pressure into usable electrical energy using 35mm prewired piezo discs. Generated pulses are harvested, rectified and stored in a 2×18650 battery pack. The system includes an Arduino Uno R3 with an I2C 16×2 LCD to display live voltage and status. A rocker SPST switch controls output, and onboard regulation provides 5V for the Arduino and peripherals. This unit is designed as a classroom demo, DIY exhibit, or shop demo to show energy harvesting from everyday movement. Specifications Piezo Sensors: 3 × 35mm Prewired Piezo Disc Energy Storage: 2 × 18650 Li-ion cells (series configuration ≈ 7.4V nominal, 8.4V full) Battery Holder: 2-Chamber 18650 Battery Holder Case Controller: Arduino Uno R3 SMD Development Board (with USB cable) Display: 16×2 LCD with I2C adapter (White on Blue) Switch: 2-Pin Rocker Switch (SPST ON/OFF) Regulation: 5V output for Arduino via a regulated module (recommended switching regulator) Protection & Charging: Requires proper Li-ion charging/BMS (use 2S BMS or charge with appropriate 2S charger) Interconnect: 1.6mm Slim 22 AWG cable for piezo wiring Indicator: 5mm white LED for road illumination/status Mounting: 5mm PVC plastic board for electronics mounting Output Behavior: Pulsed AC from piezos → rectified DC → stored in batteries; usable for low-power LEDs and Arduino display Notes: Actual harvested energy varies with foot/vehicle pressure and installation; system requires proper rectification and charging circuitry for safe operation