Connecting an LED relay involves wiring the relay to control the LED circuit, typically using the relay's coil to switch the LED's power source. Since the provided reference is only a short snippet with no context, I will describe the general process of connecting an LED to a relay.
Here's a general guide to connecting an LED strip to a relay:
Steps to Connect an LED Strip to a Relay
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Understand the Relay: Relays typically have terminals for the coil (to energize the relay) and terminals for the switch (to control the circuit). Identify the coil terminals (often marked as A1 and A2 or + and -) and the switch terminals (Common (COM), Normally Open (NO), and Normally Closed (NC)).
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Plan the Circuit: Determine whether you want the LED strip to be on when the relay is energized (using the NO terminal) or off when the relay is energized (using the NC terminal).
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Connect the Relay Coil: Connect the relay coil to a power source (e.g., Arduino, microcontroller, or separate power supply). Ensure the voltage of the power source matches the relay's coil voltage. A simple control circuit example involves connecting the positive side of the coil to a control signal (e.g., from a microcontroller) and the negative side to the ground.
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Connect the LED Strip Power Source: Connect the positive wire of the LED strip's power source to the Common (COM) terminal of the relay switch.
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Connect the LED Strip: Connect the positive wire of the LED strip to either the Normally Open (NO) or Normally Closed (NC) terminal, depending on your desired behavior:
- Normally Open (NO): The LED strip will turn on when the relay is energized.
- Normally Closed (NC): The LED strip will turn off when the relay is energized.
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Connect the LED Strip Ground: Connect the negative wire of the LED strip to the negative wire of the LED strip's power source. This completes the LED circuit.
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Testing: Energize the relay coil. If you used the NO terminal, the LED strip should light up. If you used the NC terminal, the LED strip should turn off.
Example Scenario:
Let's say you want to control an LED strip using an Arduino and a 5V relay. The LED strip requires 12V.
- Connect the Arduino digital pin (e.g., pin 7) to one side of the relay coil, and the other side of the coil to Arduino's GND.
- Connect a 12V power supply's positive wire to the COM terminal of the relay.
- Connect the positive wire of the LED strip to the NO terminal of the relay.
- Connect the negative wire of the LED strip to the negative terminal of the 12V power supply.
Now, when the Arduino pin 7 is HIGH, the relay will energize, closing the connection between COM and NO, and the LED strip will light up.
