Circuit Building Software

Electric Components

Enclosure Materials

Components and Their Purpose

Adapter (5V): Supplies stable power to all components. 

I chose it because 5V is safe, compatible with small electronics, and reliable for both the fan and LED.

Fan: The main element that produces airflow for cooling. 

It was selected to serve the primary function of the device, making it practical and useful on a desk.

LED: Provides lighting, adding versatility. 

I included it to make the device multifunctional so it can also be used in dim environments.

ON/OFF Switch: Allows the user to control the fan and LED. 

This was chosen to give simple, direct control and to save energy when the device isn’t needed.

Breadboard: Used to assemble the circuit without soldering. 

I chose it for easy prototyping and the ability to modify or troubleshoot connections.

Jumper Wires: Create the necessary electrical connections between all components. 

They were chosen for flexibility and simplicity in building and testing the circuit.

Voltage

I used a 5-volt adapter as the power source for my handheld fan project. 

I chose 5 V because all the output components, including the fan, the LED, and the switch, are designed to operate safely and efficiently at this level. 

Using 5 V prevents overheating or damage that could happen with higher voltages, while still providing enough current for the fan to spin properly and the LED to shine brightly without flickering. 

This makes the system both reliable and safe for everyday use. 

Parallel Circuit

Type of Circuit

The circuit I designed is a parallel circuit.

I chose this type because it allows the fan and the LED to work independently while sharing the same 5 V power source. In a parallel connection, each component receives the full voltage directly from the adapter, which ensures the fan has enough power to spin effectively and the LED stays bright.

Designed using TINKER CAD

STARTED MAKING THE CIRCUIT

Cardboard Enclosure

Technical Issue I Faced

• Adding the push button to the real circuit wasn’t as easy as I expected.

• It was confusing to figure out which pins actually connect and how to place it on the breadboard.

• At first, it didn’t work because I wired it wrong and didn’t fully understand how it completes or breaks the circuit.

• Because of that, the fan and LED didn’t turn on the way I wanted.
  
  

What I Did to Solve It

• Stopped and researched how push buttons work internally (two pairs of pins, and only two connect when pressed).

• Checked Tinkercad simulations and circuit diagrams for the correct orientation.

• Tested the button with a multimeter to confirm the connected pins.

• Rewired the button across the breadboard gap, and fixed the issue.
  
  

Tips for Others

• Understand the internal pin layout of a push button before wiring it.

• Place the button across the breadboard gap so both sides connect properly.

• Test the button separately before adding it to the main circuit.

• Follow a clear circuit diagram and keep your wiring organized to avoid confusion.