Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a variety of components such as sensors, a microcontroller, a MOSFET, resistors, and a power source. The circuit is designed to interface with an Arduino UNO microcontroller and a NodeMCU V3 ESP8266, which are used to control and monitor the connected sensors and other components. The circuit includes a temperature sensor (LM35), a current sensor (ACS712), and a polymer lithium-ion battery, among other components. The document will outline the purpose and connection details of each component, followed by the embedded code for the microcontrollers.

Component List

nMOS Transistor (MOSFET)

• Description: A three-terminal device used for switching electronic signals.
• Pins: gate, drain, source

Resistor (100 kOhms)

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Resistance: 100 kOhms

Resistor (3.75 Ohms)

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Resistance: 3.75 Ohms

Resistor (10 kOhms)

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Resistance: 10 kOhms

Resistor (20 kOhms)

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Resistance: 20 kOhms

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

ACS712 Current Sensor 5A 20A 30A

• Description: A fully integrated, hall effect-based linear current sensor with 2.1 kVRMS voltage isolation.
• Pins: 1, 2, GND, OUT, VCC

NodeMCU V3 ESP8266

• Description: An open-source firmware and development kit that helps you to prototype your IoT product.
• Pins: A0, GND, VU, S3-S0, SK, 3V3, EN, RST, Vin, D0-D8, RX, TX

Polymer Lithium Ion Battery - Generic

• Description: A rechargeable battery of lithium-ion technology in a soft package or pouch format.
• Pins: GND, VCC

Temperature Sensor (LM35)

• Description: A precision integrated-circuit temperature sensor with an output voltage linearly proportional to the Centigrade temperature.
• Pins: +Vs, Vout, GND

Wiring Details

nMOS Transistor (MOSFET)

• Gate connected to Arduino UNO (D7)
• Drain connected to Resistor (3.75 Ohms) pin 2
• Source connected to Polymer Lithium Ion Battery - Generic (GND), Resistor (100 kOhms) pin 1, and Arduino UNO (GND)

Resistor (100 kOhms)

• Pin 1 connected to nMOS Transistor (MOSFET) source and Resistor (10 kOhms) pin 2
• Pin 2 connected to Arduino UNO (A0)

Resistor (3.75 Ohms)

• Pin 1 connected to Polymer Lithium Ion Battery - Generic (VCC)
• Pin 2 connected to nMOS Transistor (MOSFET) drain

Resistor (10 kOhms)

• Pin 1 connected to Polymer Lithium Ion Battery - Generic (VCC)
• Pin 2 connected to Resistor (100 kOhms) pin 1

Resistor (20 kOhms)

• Pin 1 connected to NodeMCU V3 ESP8266 (GND) and Arduino UNO (GND)
• Pin 2 connected to Resistor (10 kOhms) pin 1 and NodeMCU V3 ESP8266 (D6)

Arduino UNO

• 5V connected to Temperature Sensor (LM35) +Vs and ACS712 Current Sensor VCC
• GND connected to Temperature Sensor (LM35) GND, ACS712 Current Sensor GND, nMOS Transistor (MOSFET) source, and NodeMCU V3 ESP8266 GND
• A0 connected to Resistor (100 kOhms) pin 2
• A1 connected to ACS712 Current Sensor OUT
• A2 connected to Temperature Sensor (LM35) Vout
• D7 connected to nMOS Transistor (MOSFET) gate
• D1 connected to NodeMCU V3 ESP8266 (D5)
• D0 connected to Resistor (10 kOhms) pin 2

ACS712 Current Sensor 5A 20A 30A

• 1 connected to Polymer Lithium Ion Battery - Generic (VCC)
• 2 connected to Resistor (3.75 Ohms) pin 1
• GND connected to Arduino UNO (GND)
• OUT connected to Arduino UNO (A1)
• VCC connected to Temperature Sensor (LM35) +Vs and Arduino UNO (5V)

NodeMCU V3 ESP8266

• GND connected to Resistor (20 kOhms) pin 1 and Arduino UNO (GND)
• D5 connected to Arduino UNO (D1)
• D6 connected to Resistor (20 kOhms) pin 2

Polymer Lithium Ion Battery - Generic

• GND connected to nMOS Transistor (MOSFET) source, Resistor (100 kOhms) pin 1, and Arduino UNO (GND)
• VCC connected to ACS712 Current Sensor pin 1 and Resistor (3.75 Ohms) pin 1

Temperature Sensor (LM35)

• +Vs connected to ACS712 Current Sensor VCC and Arduino UNO (5V)
• Vout connected to Arduino UNO (A2)
• GND connected to ACS712 Current Sensor GND and Arduino UNO (GND)

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

NodeMCU V3 ESP8266 Code

No code provided for NodeMCU V3 ESP8266 in the input.