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 with Battery Charging | SimpleCircuits 🌙 SimpleCircuits Arduino Solar BMS Renewable Energy Project Dual Axis Solar Tracker + Battery Charging A complete solar energy solution — dual-axis LDR tracking, 12V panel array, TP5100 charging, 2S BMS protection, and 7.4V battery. Up to 40% more energy capture than fixed mounts. 40% Efficiency Gain 12V Panel Output 2-Axis Tracking 7.4V Battery BMS Protected Finished Build ☀️ System Overview How the System Works Four LDR modules with adjustable potentiometers sense directional light intensity. Arduino computes top/bottom and left/right deltas, driving two SG90 servos to...