Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Mega 2560 microcontroller, various sensors, LEDs, and other components. The circuit is designed to interface with multiple peripherals, including a rotary encoder, an OLED display, and an NRF24L01 wireless module. The document includes a component list, wiring details, and the embedded code used in the microcontroller.

Component List

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL

HW-040 Rotary Encoder

• Description: A rotary encoder module used for detecting rotational position.
• Pins: GND, +, SW, DT, CLK

NRF24L01

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

Pushbutton

• Description: A simple pushbutton switch.
• Pins: Pin 1 (in), Pin 2 (in), Pin 3 (out), Pin 4 (out)

LED: Two Pin (green)

• Description: A green LED.
• Pins: cathode, anode

RJ45

• Description: An RJ45 connector.
• Pins: R1+, R1-, R2+, R2-, R3+, R3-, 5V, GND

Resistor

• Description: A resistor with various resistance values.
• Pins: pin1, pin2
• Properties: Resistance (200-220 Ohms)

128x64 OLED Display (I2C IIC SPI Serial)

• Description: An OLED display module.
• Pins: GND, SDA, SCL, VCC

DC to DC Boost Converter

• Description: A module to boost DC voltage.
• Pins: vin-, vin+, out+, out-

TP4056

• Description: A lithium battery charger module.
• Pins: OUT-, B-, B+, OUT+, IN-, IN+

Li-ion 18650 Battery

• Description: A rechargeable lithium-ion battery.
• Pins: -, +

USB C Breakout Board

• Description: A breakout board for USB-C connectors.
• Pins: VBUS, GND, CC1, D-, D+, CC2

Rocker Switch

• Description: A simple on/off rocker switch.
• Pins: 1, 2

RJ11

• Description: An RJ11 connector.
• Pins: 1, 2

Female BNC

• Description: A female BNC connector.
• Pins: Pin 1, Pin 2

Wiring Details

Arduino Mega 2560

• RESET connected to Pushbutton Pin 1 (in)
• 3V3 connected to NRF24L01 VCC (3V)
• 5V connected to HW-040 Rotary Encoder +, 128x64 OLED Display (I2C IIC SPI Serial) VCC
• GND connected to HW-040 Rotary Encoder GND, 128x64 OLED Display (I2C IIC SPI Serial) GND, dc to dc boost converter out-, NRF24L01 GND, LED: Two Pin (green) cathode (multiple LEDs)
• VIN connected to dc to dc boost converter out+
• D21/SCL connected to 128x64 OLED Display (I2C IIC SPI Serial) SCL
• D20/SDA connected to 128x64 OLED Display (I2C IIC SPI Serial) SDA
• D2 PWM connected to NRF24L01 CE
• D4 PWM connected to HW-040 Rotary Encoder DT
• D8 PWM connected to HW-040 Rotary Encoder SW
• D10 PWM connected to HW-040 Rotary Encoder CLK
• D11 PWM connected to NRF24L01 CSN
• D52 connected to NRF24L01 SCK
• D50 connected to NRF24L01 MOSI
• D51 connected to NRF24L01 MISO
• D46 connected to RJ11 1
• D44 connected to RJ11 2
• D40 connected to Resistor pin2
• D38 connected to Resistor pin2
• D36 connected to Resistor pin2
• D34 connected to Resistor pin2
• D32 connected to Resistor pin2
• D28 connected to Resistor pin2
• D26 connected to Resistor pin2
• D24 connected to Resistor pin2
• D22 connected to Pushbutton Pin 2 (in)
• D47 connected to Female BNC Pin 2
• D45 connected to Female BNC Pin 1
• D41 connected to RJ45 GND
• D39 connected to RJ45 5V
• D37 connected to RJ45 R3-
• D33 connected to RJ45 R3+
• D31 connected to RJ45 R2-
• D29 connected to RJ45 R2+
• D25 connected to RJ45 R1-
• D23 connected to RJ45 R1+

HW-040 Rotary Encoder

• + connected to Arduino Mega 2560 5V
• GND connected to Arduino Mega 2560 GND
• SW connected to Arduino Mega 2560 D8 PWM
• DT connected to Arduino Mega 2560 D4 PWM
• CLK connected to Arduino Mega 2560 D10 PWM

NRF24L01

• VCC (3V) connected to Arduino Mega 2560 3V3
• GND connected to dc to dc boost converter out-, Arduino Mega 2560 GND
• CE connected to Arduino Mega 2560 D2 PWM
• CSN connected to Arduino Mega 2560 D11 PWM
• SCK connected to Arduino Mega 2560 D52
• MOSI connected to Arduino Mega 2560 D50
• MISO connected to Arduino Mega 2560 D51

Pushbutton

• Pin 1 (in) connected to Arduino Mega 2560 RESET
• Pin 2 (in) connected to Arduino Mega 2560 D22
• Pin 3 (out) connected to Arduino Mega 2560 GND

LED: Two Pin (green)

• cathode connected to Arduino Mega 2560 GND (multiple LEDs)
• anode not specified

RJ45

• GND connected to Arduino Mega 2560 D41
• 5V connected to Arduino Mega 2560 D39
• R3- connected to Arduino Mega 2560 D37
• R3+ connected to Arduino Mega 2560 D33
• R2- connected to Arduino Mega 2560 D31
• R2+ connected to Arduino Mega 2560 D29
• R1- connected to Arduino Mega 2560 D25
• R1+ connected to Arduino Mega 2560 D23

Resistor

• pin2 connected to Arduino Mega 2560 D40, D38, D36, D34, D32, D28, D26, D24

128x64 OLED Display (I2C IIC SPI Serial)

• VCC connected to Arduino Mega 2560 5V
• GND connected to Arduino Mega 2560 GND
• SCL connected to Arduino Mega 2560 D21/SCL
• SDA connected to Arduino Mega 2560 D20/SDA

DC to DC Boost Converter

• out- connected to NRF24L01 GND, Arduino Mega 2560 GND
• out+ connected to Arduino Mega 2560 VIN
• vin- connected to TP4056 OUT-
• vin+ connected to Rocker Switch 2

TP4056

• OUT- connected to dc to dc boost converter vin-
• OUT+ connected to **Rocker Switch