DIY Club

  DIY: Convert a Solar Light into a Burglar Alarm Got an old solar garden light lying around? Let’s turn it into a solar-powered burglar alarm — a smart way to reuse electronics and increase home security without extra electricity cost. 🧾 What You Need Component Use Solar Garden Light (with battery) Power source & housing Buzzer or Siren (3V–6V) Alarm sound PIR Motion Sensor (HC-SR501 or similar) Motion detection Transistor (e.g., BC547) To amplify motion signal Resistors (1kΩ, 10kΩ) For transistor biasing Small Relay (optional) For higher power buzzer Wires, Glue, Drill Assembly tools ⚙️ Basic Idea We use the solar light's battery to power a motion sensor and buzzer . When motion is detected (like an intruder), the sensor triggers the buzzer — creating a loud alert. 🔌 Circuit Overview css Copy Edit [ Solar Panel ] → Charges → [ Rechargeable Battery ] [ Battery ] → [PIR Sensor] → [Transistor Trigger] → [Buzzer] The PIR sensor detects motion. The tran...