Overview

This experiment demonstrates how a relay can be used to control high-current loads safely, such as motors or lamps.

Components Required

• Relay (SPDT or DPDT)
• High-current load (e.g., motor or lamp)
• Transistor (e.g., 2N2222)
• Diode (1N4007)
• Resistors
• Power supply
• Breadboard and wires

Procedure

1. Connect the relay in series with the high-current load.

2. Use a transistor to drive the relay coil, with a diode across the coil to protect against voltage spikes.

3. Control the relay via a switch or microcontroller to turn the high-current load on and off.

Expected Result

The high-current load will be controlled by the relay, switching on and off as commanded by the transistor.