Circuit Documentation

Summary

This document provides a detailed overview of a circuit consisting of various components including LEDs, a battery, a resistor, a fan, a relay, a diode, a transistor, and a gas sensor. The circuit is designed to demonstrate the interconnection and functionality of these components.

Component List

1. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: A red light-emitting diode used for indication purposes.

2. 5V Battery

   • Pins: +, -
   • Description: A power source providing 5V DC.

3. Resistor

   • Pins: pin1, pin2
   • Description: A resistor used to limit current.
   • Properties:
     • Resistance: NaN Ohms

4. Fan

   • Pins: GND, 5V
   • Description: A fan used for cooling purposes.

5. 12V Relay

   • Pins: +, -, C, NC, NO
   • Description: A relay used to control high voltage circuits with a low voltage signal.

6. 1N4007 Rectifier Diode

   • Pins: Cathode, Anode
   • Description: A diode used for rectification purposes.

7. BC557 Transistor

   • Pins: Collector, Base, Emitter
   • Description: A PNP transistor used for switching and amplification.

8. MQ6

   • Pins: VCC, GND, A0, DO
   • Description: A gas sensor used to detect the presence of gas.

Wiring Details

LED: Two Pin (red)

• Instance 1:

  • cathode: Connected to NO pin of 12V Relay and 5V pin of Fan.
  • anode: Connected to - pin of 12V Relay, anode pin of another LED, GND pin of MQ6, Anode pin of 1N4007 Rectifier Diode, GND pin of Fan, and - pin of 5V Battery.

• Instance 2:

  • cathode: Connected to NC pin of 12V Relay.
  • anode: Connected to - pin of 12V Relay, anode pin of another LED, GND pin of MQ6, Anode pin of 1N4007 Rectifier Diode, GND pin of Fan, and - pin of 5V Battery.

5V Battery

• + pin: Connected to C pin of 12V Relay, VCC pin of MQ6, and Emitter pin of BC557 Transistor.
• - pin: Connected to - pin of 12V Relay, anode pin of both LEDs, GND pin of MQ6, Anode pin of 1N4007 Rectifier Diode, and GND pin of Fan.

Resistor

• pin1: Connected to DO pin of MQ6.
• pin2: Connected to Base pin of BC557 Transistor.

Fan

• 5V pin: Connected to NO pin of 12V Relay and cathode pin of LED.
• GND pin: Connected to - pin of 12V Relay, anode pin of both LEDs, GND pin of MQ6, Anode pin of 1N4007 Rectifier Diode, and - pin of 5V Battery.

12V Relay

• NO pin: Connected to cathode pin of LED and 5V pin of Fan.
• - pin: Connected to anode pin of both LEDs, GND pin of MQ6, Anode pin of 1N4007 Rectifier Diode, GND pin of Fan, and - pin of 5V Battery.
• C pin: Connected to VCC pin of MQ6, + pin of 5V Battery, and Emitter pin of BC557 Transistor.
• + pin: Connected to Cathode pin of 1N4007 Rectifier Diode and Collector pin of BC557 Transistor.
• NC pin: Connected to cathode pin of another LED.

1N4007 Rectifier Diode

• Cathode: Connected to + pin of 12V Relay and Collector pin of BC557 Transistor.
• Anode: Connected to - pin of 12V Relay, anode pin of both LEDs, GND pin of MQ6, GND pin of Fan, and - pin of 5V Battery.

BC557 Transistor

• Collector: Connected to + pin of 12V Relay and Cathode pin of 1N4007 Rectifier Diode.
• Base: Connected to pin2 of Resistor.
• Emitter: Connected to C pin of 12V Relay and + pin of 5V Battery.

MQ6

• VCC: Connected to C pin of 12V Relay and + pin of 5V Battery.
• GND: Connected to - pin of 12V Relay, anode pin of both LEDs, Anode pin of 1N4007 Rectifier Diode, GND pin of Fan, and - pin of 5V Battery.
• DO: Connected to pin1 of Resistor.

Code

No microcontroller code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code documentation.