Circuit Documentation

Summary

This circuit appears to be designed to control multiple solenoids using an Arduino UNO as the main microcontroller. The solenoids are likely actuated via a 4-channel relay module, which is interfaced with the Arduino. The transistors are used as switches to control the relay inputs, and resistors are likely for current limiting purposes. The supply component provides power to the circuit, and the ground component is used to complete the circuit.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

NPN-Transistor

• A bipolar junction transistor used for amplification and switching purposes.
• It has three pins: Emitter (E), Collector (C), and Base (B).

Resistor

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

Supply

• Provides the VCC (positive voltage) and GND (ground) to the circuit.

Ground

• A reference point in an electrical circuit from which voltages are measured.

Solenoid

• An electromechanical device that converts electrical energy into mechanical action.

Relay 4 Channel 5v

• An electrically operated switch that allows you to control a circuit by a separate low-power signal.
• It has multiple pins for ground (GND), input signals (IN1-IN4), common pins (COM1-COM4), normally open (NO1-NO4), and normally closed (NC1-NC4) contacts.

Wiring Details

Arduino UNO

• GND connected to the emitters of all NPN-Transistors and solenoids.
• Digital pins D13, D12, D11, and D10 connected to resistors.

NPN-Transistors

• Emitter (E) connected to GND.
• Collector (C) connected to one end of a resistor.
• Base (B) connected to relay input channels (IN1-IN4).

Resistors

• One end connected to an Arduino digital pin (D13, D12, D11, D10).
• The other end connected to the collector of an NPN-Transistor.

Supply

• VCC connected to the VCC of the relay module.
• GND connected to the ground of the circuit.

Ground

• GND used as the common ground reference for the circuit.

Solenoids

• One pin connected to the emitter of an NPN-Transistor.
• The other pin connected to the normally open (NO) contacts of the relay module.

Relay 4 Channel 5v

• VCC connected to the supply VCC.
• GND connected to the circuit ground.
• IN1-IN4 connected to the bases of NPN-Transistors.
• COM1-COM4 connected to the supply VCC.
• NO1-NO4 connected to solenoids.

Documented Code

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

}

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

}

The provided code is a template with empty setup() and loop() functions. The setup() function is intended for code that runs once at the start, such as pin mode declarations. The loop() function is for code that runs continuously. Actual implementation details need to be added to control the solenoids via the relay module.