Circuit Documentation

Summary

This circuit consists of a 9V battery, a 5V relay, an LDR (Light Dependent Resistor), and a Piezo Buzzer. The circuit is designed to use the LDR to control the relay, which in turn controls the Piezo Buzzer. When the LDR detects a certain level of light, it triggers the relay, which then activates the Piezo Buzzer.

Component List

9V Battery

• Description: Provides the primary power source for the circuit.
• Pins: +, -

5V Relay

• Description: Acts as a switch that is controlled by the LDR to activate the Piezo Buzzer.
• Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC

LDR (Light Dependent Resistor)

• Description: Senses the ambient light level and sends a signal to the relay.
• Pins: A0, D0, GND, VCC

Piezo Buzzer

• Description: Emits sound when activated by the relay.
• Pins: pin 1, pin 2

Wiring Details

9V Battery

• + is connected to:

  • VCC of LDR
  • Normally Open of 5V Relay
  • VCC of 5V Relay

• - is connected to:

  • GND of LDR
  • pin 1 of Piezo Buzzer
  • GND of 5V Relay

5V Relay

• Normally Open is connected to:

  • • of 9V Battery

• Common terminal is connected to:

  • pin 2 of Piezo Buzzer

• Normally Closed is not connected.

• In is connected to:

  • D0 of LDR

• GND is connected to:

  • • of 9V Battery
  • GND of LDR
  • pin 1 of Piezo Buzzer

• VCC is connected to:

  • • of 9V Battery

LDR

• VCC is connected to:

  • • of 9V Battery

• D0 is connected to:

  • In of 5V Relay

• GND is connected to:

  • • of 9V Battery
  • pin 1 of Piezo Buzzer
  • GND of 5V Relay

• A0 is not connected.

Piezo Buzzer

• pin 1 is connected to:

  • GND of LDR
  • • of 9V Battery
  • GND of 5V Relay

• pin 2 is connected to:

  • Common terminal of 5V Relay

Code

There is no microcontroller code provided for this circuit.