Circuit Documentation

Summary

This circuit is designed around the Arduino Mega 2560 microcontroller, which serves as the central processing unit for controlling various peripherals including servos, a peristaltic pump, LEDs, and DC motors with encoders. The circuit includes user input interfaces such as pushbuttons, a potentiometer, toggle switches, and a rocker switch. Power management is handled by power MOSFETs and a DC power source. The circuit also features an Adafruit NeoPixel Stick for visual output.

Component List

Microcontroller

• Arduino Mega 2560: A microcontroller board based on the ATmega2560, with a multitude of GPIO pins for interfacing with various components.

Actuators

• Servo: A rotary actuator that allows for precise control of angular position.
• Peristaltic Pump: A type of positive displacement pump used for pumping various fluids.
• DC Motor with Encoder: A motor that provides feedback on its position or velocity via an encoder.

Power Components

• Power MOSFET: Used for switching heavy loads with a small control signal.
• DC Power Source: Provides the necessary power to the circuit.

Input Devices

• Pushbutton: A simple switch mechanism for controlling some aspect of a machine or a process.
• Potentiometer: A three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
• Toggle Switch: A switch that can maintain its state either open or closed.
• Rocker Switch: A button for switching power with a seesaw action.

Indicators

• Adafruit NeoPixel Stick: An LED strip with individually addressable RGB LEDs.
• LED: Two Pin (white): A basic white light-emitting diode.

Passive Components

• Resistor (200 Ohms): A passive two-terminal electrical component that implements electrical resistance as a circuit element.

Wiring Details

Arduino Mega 2560

• 5V connected to Toggle Switch (COM)
• A0 connected to Potentiometer (Output)
• A1 connected to DC Motor with Encoder (Encoder B)
• A2 connected to DC Motor with Encoder (Encoder B)
• D11 PWM connected to Servo (pulse)
• D12 PWM connected to Servo (pulse)
• D13 PWM connected to Adafruit NeoPixel Stick (DATAIN)
• D52 connected to Toggle Switch (L1)
• D50 connected to Toggle Switch (L2)
• D48 connected to Rocker Switch (1)
• D42, D40, D38, D36, D34, D32, D30, D28, D26, D24, D22 connected to corresponding Pushbuttons (Pin 1)
• D43, D41, D39, D37 connected to corresponding Power MOSFETs (PWM)

Servo

• GND connected to GND
• VCC connected to VCC

Peristaltic Pump

• "+" and "-" connected to corresponding Power MOSFETs (+V(5-36V) and GND(5-36V))

Power MOSFET

• PWM connected to Arduino Mega 2560 (D34, D43, D41, D39, D37)
• GND connected to GND
• GND(5-36V) connected to DC Power Source (Ground)
• +V(5-36V) connected to DC Power Source (Positive)

Pushbutton

• Pin 2 connected to corresponding Resistor (pin2)
• Pin 3 connected to VCC
• Pin 1 connected to Arduino Mega 2560 (D42, D40, D38, D36, D34, D32, D30, D28, D26, D24, D22)

Resistor (200 Ohms)

• Pin 1 connected to GND
• Pin 2 connected to corresponding Pushbutton (Pin 2)

Adafruit NeoPixel Stick

• GND connected to GND
• +5V connected to VCC
• DATAIN connected to Arduino Mega 2560 (D13 PWM)

LED: Two Pin (white)

• Cathode connected to Power MOSFET (GND(5-36V))
• Anode connected to Power MOSFET (+V(5-36V))

Potentiometer

• GND connected to GND
• Output connected to Arduino Mega 2560 (A0)
• VCC connected to VCC

Toggle Switch

• COM connected to Arduino Mega 2560 (5V)
• L1 connected to Arduino Mega 2560 (D52)
• L2 connected to Arduino Mega 2560 (D50)

Rocker Switch

• 1 connected to Arduino Mega 2560 (D48)
• 2 connected to VCC

DC Motor with Encoder

• Encoder B connected to Arduino Mega 2560 (A1, A2)
• GND connected to GND
• VCC connected to VCC
• Motor +ve connected to GND
• Motor -ve connected to VCC

Documented Code

Arduino Mega 2560 - sketch.ino

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

}

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

}

Arduino Mega 2560 - documentation.txt

(No additional documentation provided)