Simple Circuits

Traffic Light Using Arduino Uno and OLED Display Traffic Light Using Arduino Uno and OLED Display This project creates a realistic traffic light system with an OLED display timer, featuring custom PCB design and professional LED sequencing. The system follows standard traffic light patterns with visual countdown display for enhanced user experience. How the System Works Custom traffic light-shaped PCB with vertical LED arrangement (Red, Yellow, Green) 0.96" OLED display shows real-time countdown timer for each light phase Standard traffic light sequence: Red (15s) → Green (13s) → Yellow (3s) Yellow light features blinking "00" display for clear warning indication Each 10mm LED has dedicated 220 ohm current-limiting resistor Professional timing with 1-second delay between Red and Green transitions Powered by 7.4V ...

Dual Axis Solar Tracker System With Battery Charging Dual Axis Solar Tracker System With Battery Charging This project creates an advanced solar tracking system that follows the sun's movement across both horizontal and vertical axes for maximum energy efficiency. The system includes integrated battery charging with protection circuitry, making it a complete solar energy solution. How the System Works Four LDR modules with adjustable potentiometers detect sunlight intensity from all directions Two SG90 servo motors provide dual-axis movement (horizontal and vertical) Arduino continuously compares LDR readings and adjusts panel position for optimal sunlight Two 6V solar panels connected in series provide 12V output TP5100 charging module converts 12V to 8.4V for battery charging 2S 20A BMS protects the 7.4V battery from overcharging...