Spectrum analyzer Soldering Kit

The goal of this assignment is to improve our soldering skills since the LEDs are hard to solder flat. Besides, it also demonstrate how the circuit works and what the function of resistors is.

Process of Making the Spectrum Analyzer

Step 1: Soldering components onto the front side of PCB Board

All the materials needed

PCB Board with Resistors

I first soldered the 200R resistors on the board since the number of the 200R resistors are the most.

PCB Board with all 200R resistors on.

Next, I soldered Chip capacitance on. The reason for choosingthis one is based on the height. We need to solder the component from low to high.

The back of the PCB Board after soldering the chip capacitance.

I first put the red LEDs on the first column and then use a paper to flip the board over so that the LEDs wouldn't fall off. This is the picture after I put solder on the LEDs. After putting solder on all the LEDs, I adjusted the LEDs so that they would lay flat on the board. I melted the solder and pushed it by pressing my finger on the LEDs.

The back of the PCB Board after I finish soldering and adjusting.

I first try to solder the LEDs on in red, green and blue. But then I realized that it is hard to do soldering because I have to cut off the legs of the LEDs everytime I finished a column. So I decided to solder the LEDs on by colors.

The back of the LEDs after soldering three column of LEDs with different colors

PCB Board after finishing soldering all the LEDs on

Step 2: Soldering components onto the Back Side of the PCB Board

PCB Board after soldering Microphone and USB female head

It was hard to solder the switch onto the PCB Board because it would move during the soldering process. So I used a tweezer to fix its location when soldering.

The Completed Back side of the PCB Board

Step 3: Testing the LEDs

IMG_1687.MOV

Video of the final PCB board with the lights on

Step 4: Adding Frames around the PCB Board

Front side of the PCB Board

Back Side of the PCB Board

Problem Encountered

It was really hard to make the LEDs flat. So I had to put solder on only one side of the legs and melted the solder and press the LEDs against the board. It was very time-consuming. At first, I didn't do the LEDs by color. I had to memorize the order of the color for each column. However, it was too slow. Then I started to solder all LEDs with the same color onto the PCB board. That really reduce the time I spent on the LEDs.

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