Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Nano, a load cell, an HX711 bridge sensor interface, an NRF24L01 wireless module with an adapter, a DHT11 temperature and humidity sensor, and a 5V power supply. The circuit is designed to measure weight using the load cell, transmit data wirelessly using the NRF24L01 module, and monitor environmental conditions using the DHT11 sensor.

Component List

POWER SUPPLY 5V 5AMP

• Description: Provides 5V DC power to the circuit.
• Pins:
  • 220V Positive Pole (AC)
  • 220V Negative Pole (AC)
  • GND
  • GND (DC)
  • 12V-24V Output (DC)

Arduino Nano

• Description: A small, complete, and breadboard-friendly board based on the ATmega328P.
• Pins:
  • D1/TX
  • D0/RX
  • RESET
  • GND
  • D2
  • D3
  • D4
  • D5
  • D6
  • D7
  • D8
  • D9
  • D10
  • D11/MOSI
  • D12/MISO
  • VIN
  • 5V
  • A7
  • A6
  • A5
  • A4
  • A3
  • A2
  • A1
  • A0
  • AREF
  • 3V3
  • D13/SCK

Load Cell - Red/white/black/green

• Description: A sensor used to measure weight.
• Pins:
  • E+
  • A-
  • E-
  • A+

NRF24L01 Adapter

• Description: Adapter for the NRF24L01 wireless module.
• Pins:
  • CE
  • CSN
  • SCK
  • MOSI
  • MISO
  • IRQ
  • VCC
  • GND

NRF24L01

• Description: A wireless transceiver module.
• Pins:
  • IRQ (not used)
  • MOSI
  • CSN
  • VCC (3V)
  • GND
  • CE
  • SCK
  • MISO

DHT 11

• Description: A temperature and humidity sensor.
• Pins:
  • VCC
  • GND
  • DATA

HX711 - Bridge Sensor Interface

• Description: An interface for bridge sensors like load cells.
• Pins:
  • E+
  • E-
  • A-
  • A+
  • B-
  • B+
  • GND - GROUND
  • DATA (OUT)
  • SCK - CLOCK (IN)
  • 3.3/3.5V Supply

Wiring Details

POWER SUPPLY 5V 5AMP

• GND (DC) is connected to:

  • HX711 - Bridge Sensor Interface: GND - GROUND
  • DHT 11: GND
  • NRF24L01 Adapter: GND

• 12V-24V Output (DC) is connected to:

  • HX711 - Bridge Sensor Interface: 3.3/3.5V Supply
  • DHT 11: VCC
  • NRF24L01 Adapter: VCC

Arduino Nano

• D2 is connected to:

  • DHT 11: DATA

• D4 is connected to:

  • HX711 - Bridge Sensor Interface: SCK - CLOCK (IN)

• D5 is connected to:

  • HX711 - Bridge Sensor Interface: DATA (OUT)

• D9 is connected to:

  • NRF24L01 Adapter: CE

• D10 is connected to:

  • NRF24L01 Adapter: CSN

• D11/MOSI is connected to:

  • NRF24L01 Adapter: MOSI

• D12/MISO is connected to:

  • NRF24L01 Adapter: MISO

• D13/SCK is connected to:

  • NRF24L01 Adapter: SCK

Load Cell - Red/white/black/green

• E+ is connected to:

  • HX711 - Bridge Sensor Interface: E+

• A- is connected to:

  • HX711 - Bridge Sensor Interface: A-

• E- is connected to:

  • HX711 - Bridge Sensor Interface: E-

• A+ is connected to:

  • HX711 - Bridge Sensor Interface: A+

NRF24L01 Adapter

• CE is connected to:

  • Arduino Nano: D9

• CSN is connected to:

  • Arduino Nano: D10

• MOSI is connected to:

  • Arduino Nano: D11/MOSI

• MISO is connected to:

  • Arduino Nano: D12/MISO

• SCK is connected to:

  • Arduino Nano: D13/SCK

• VCC is connected to:

  • POWER SUPPLY 5V 5AMP: 12V-24V Output (DC)

• GND is connected to:

  • POWER SUPPLY 5V 5AMP: GND (DC)

DHT 11

• VCC is connected to:

  • POWER SUPPLY 5V 5AMP: 12V-24V Output (DC)

• GND is connected to:

  • POWER SUPPLY 5V 5AMP: GND (DC)

• DATA is connected to:

  • Arduino Nano: D2

HX711 - Bridge Sensor Interface

• E+ is connected to:

  • Load Cell - Red/white/black/green: E+

• A- is connected to:

  • Load Cell - Red/white/black/green: A-

• E- is connected to:

  • Load Cell - Red/white/black/green: E-

• A+ is connected to:

  • Load Cell - Red/white/black/green: A+

• GND - GROUND is connected to:

  • POWER SUPPLY 5V 5AMP: GND (DC)

• DATA (OUT) is connected to:

  • Arduino Nano: D5

• SCK - CLOCK (IN) is connected to:

  • Arduino Nano: D4

• 3.3/3.5V Supply is connected to:

  • POWER SUPPLY 5V 5AMP: 12V-24V Output (DC)

Documented Code

Arduino Nano Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)