DIY Polarity Tester
DIY Polarity Tester Pakistan Science Club E-Learning Online Store Overview Ensure correct polarity with your own homemade polarity tester. This DIY project helps you easily identify the positive and negative terminals of electronic components or connections. Materials Needed LED (Light Emitting Diode): Choose a bright LED. Color doesn't matter for this project. Resistor: Use a resistor suitable for the chosen LED (typically around 220-1k ohms). Battery Holder: Select a battery holder for a single AAA or AA battery. Battery: Use a AAA or AA battery. Wire: Use insulated wire for connecting components. Alligator Clips (Optional): Optional for easily attaching the tester to components. Instructions Prepare the LED Identify the longer lead of the LED, which is the positive (anode) lead. The shorter lead is the negative (cathode) lead. Connect the Resistor Connect the resistor to the negative lead (shorter lead) of the LED. Connect the Battery Holder Connect the positive lead