Circuit Documentation

Summary

This circuit involves a 5V relay, a red LED, a USB plug, a photocell (LDR), and a resistor. The circuit is designed to control the LED based on the light intensity detected by the photocell. The USB plug provides power to the circuit.

Component List

1. 5V Relay

   • Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC
   • Description: A relay that operates at 5V.
   • Purpose: Used to switch the LED on and off based on the input from the photocell.

2. LED: Two Pin (red)

   • Pins: Cathode, Anode
   • Description: A red LED.
   • Purpose: Indicates the status of the circuit.

3. USB Plug

   • Pins: GND, D+, D-, 5V+, Out
   • Description: A standard USB plug.
   • Purpose: Provides 5V power to the circuit.

4. Photocell (LDR)

   • Pins: Pin 0, Pin 1
   • Description: A light-dependent resistor.
   • Purpose: Detects the ambient light level.

5. Resistor

   • Pins: Pin1, Pin2
   • Description: A resistor with a resistance of 200 Ohms.
   • Purpose: Limits the current to the LED.

Wiring Details

5V Relay

• Common terminal is connected to Pin2 of the Resistor.
• Normally Closed is connected to 5V+ of the USB Plug.
• VCC is connected to 5V+ of the USB Plug.
• In is connected to Pin 0 of the Photocell (LDR).
• GND is connected to GND of the USB Plug and Pin 1 of the Photocell (LDR).

LED: Two Pin (red)

• Cathode is connected to GND of the USB Plug and Pin 1 of the Photocell (LDR).
• Anode is connected to Pin1 of the Resistor.

USB Plug

• 5V+ is connected to Normally Closed and VCC of the 5V Relay.
• GND is connected to Cathode of the LED, GND of the 5V Relay, and Pin 1 of the Photocell (LDR).

Photocell (LDR)

• Pin 0 is connected to In of the 5V Relay.
• Pin 1 is connected to GND of the USB Plug, Cathode of the LED, and GND of the 5V Relay.

Resistor

• Pin1 is connected to Anode of the LED.
• Pin2 is connected to Common terminal of the 5V Relay.

Code

There is no code associated with this circuit.