Circuit Documentation

Summary

The circuit in question appears to be a power regulation and control system with an interface for a coin reader and an LCD display. The system is controlled by an Arduino UNO microcontroller, which manages input from the coin reader and outputs to the LCD. A 12V power supply is regulated down to a lower voltage using an LM2596 voltage regulator. A diode provides polarity protection, and a MOSFET (IRFZ44N) is used for switching purposes, possibly for controlling power to a load. The circuit also includes a USB female port, likely for providing power output or data communication.

Component List

IRFZ44N

• Description: N-Channel MOSFET
• Pins: Gate, Drain, Source

Resistor

• Description: Passive electrical component with a resistance of 1 Ohm
• Pins: pin1, pin2

Diode

• Description: Semiconductor device that allows current to flow in one direction
• Pins: cathode, anode

Coin Reader

• Description: Device for detecting and counting coins
• Pins: VCC, COIN, VDD, COUNTER

Arduino UNO

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

12V Power Supply

• Description: Provides a 12V power source
• Pins: +, -

DC Connector

• Description: Connector for DC power input
• Pins: 1, 2

Terminal PCB 2 Pin (x2)

• Description: Two-pin terminal for PCB mounting
• Pins: Pin A, Pin B

LM2596

• Description: Voltage Regulator
• Pins: IN, OUT

USB Female

• Description: Female USB connector for power or data
• Pins: VCC, GND, -D, +D

16x2 I2C LCD

• Description: Liquid Crystal Display with I2C interface
• Pins: GND, VCC, SDA, SCL

Wiring Details

IRFZ44N

• Gate connected to Resistor (pin1) and Arduino UNO (D9)
• Drain connected to Diode (anode) and LM2596 (IN)
• Source connected to Resistor (pin2)

Resistor

• pin1 connected to IRFZ44N (Gate) and Arduino UNO (D9)
• pin2 connected to IRFZ44N (Source)

Diode

• cathode connected to Terminal PCB 2 Pin (Pin A), LM2596 (IN), 12V Power Supply (-), and DC Connector (1)
• anode connected to IRFZ44N (Drain)

Coin Reader

• VCC connected to Arduino UNO (5V)
• COIN connected to Arduino UNO (D8)
• VDD connected to Arduino UNO (GND)
• COUNTER connected to Arduino UNO (5V)

Arduino UNO

• D9 connected to IRFZ44N (Gate) and Resistor (pin1)
• D8 connected to Coin Reader (COIN)
• 5V connected to Coin Reader (COUNTER) and 16x2 I2C LCD (VCC)
• GND connected to Coin Reader (VDD) and 16x2 I2C LCD (GND)
• A4 connected to 16x2 I2C LCD (SDA)
• A5 connected to 16x2 I2C LCD (SCL)

12V Power Supply

• • connected to Terminal PCB 2 Pin (Pin B)
• • connected to Diode (cathode), Terminal PCB 2 Pin (Pin A), LM2596 (IN), and DC Connector (1)

DC Connector

• 1 connected to Diode (cathode) and 12V Power Supply (-)
• 2 connected to Terminal PCB 2 Pin (Pin B)

Terminal PCB 2 Pin

• Pin A connected to Diode (cathode), LM2596 (IN), and 12V Power Supply (-)
• Pin B connected to 12V Power Supply (+) and DC Connector (2)

LM2596

• IN connected to Diode (cathode), Terminal PCB 2 Pin (Pin A), and 12V Power Supply (-)
• OUT connected to USB Female (VCC and GND)

USB Female

• VCC connected to LM2596 (OUT)
• GND connected to LM2596 (OUT)

16x2 I2C LCD

• GND connected to Arduino UNO (GND)
• VCC connected to Arduino UNO (5V)
• SDA connected to Arduino UNO (A4)
• SCL connected to Arduino UNO (A5)

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:

}

Additional Notes (documentation.txt)

No additional code documentation was provided.