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Objective:
The objective of this project was to assemble a music analyzer that is sensitive, and lights up, to sensing sound. This was also a review of our ability to solder components. The kit included LEDs, chips, and capacitors, offering a review of polarity as well.
Materials:
↳ Components taken out and displayed
↳ Organized, taped, and labelled all the components
Fabrication Phase: Resistors
We used multimeteres to measure and confirm the resistance of all the resistors in the kit. They were not polar so orientation did not matter.
↳ Soldered the 200R resistors
↳ Soldered the 120k resistors
↳ Soldered the 10K resistors
↳ Soldered the 10R resistors
Fabrication Phase: Other Components
↳ Soldered Chip 104 capacitors
↳ Soldered IC socket 8P and microphone (polar)
↳ Soldered IC socket 28P (polar) and inserted LM358P DIP-8
↳ Soldered the 503 Blue and white potentiometer
↳ Soldered 470uf capacitor and power interface port
↳ Inserted Chip STC 15w DIP28 (polar)
Fabrication Phase: LEDs
↳ Soldered red column 1
↳ Soldered blue column 1
↳ Soldered green column 2
↳ Soldered green column 1
↳ Soldered red column 2
↳ Soldered blue column 2
↳ Soldered red column 3
↳ Soldered blue column 3
↳ Soldered green column 4
↳ Soldered green column 3
↳ Soldered red column 4
↳ Soldered blue column 4
Finished:
↳ Finished front
↳ Finished back
IMG_1427.mov↳ Finished product lighting up!
Testing Phase+Problems I Encountered:
One problem I encountered while soldering was soldering a 10K ohm resistor in the place of a 10 ohm resistor. I realized this when I did not have an extra 10k ohm resistor when every set came with an extra resistor. To fix this, I had to heat up the solder and pry the resistor out.
When I first tested out my final board, there was one row that did not light up. Coincidentally, it was the row that I had confused the resistors on, so I attributed my previous mistake to be the cause.
↳ Picture of malfunctioning row
IMG_1426.mov↳ Video of malfunctioning row
In inspecting the resistor, I noticed that it lacked solder and that that could be the reason for the malfunctioning row: R6.
↳ I applied some more solder to that area, but it did not solve the issue
↳ Picture of it still malfunctioning
Interestingly, when I used the power cord that came with my set, all the LEDs lit up, so I considered the problem solved.
Conclusion:
Throughout the project, it was important to be attentive to polarity and placement. This was especially apparent when I soldered my resistors in the wrong place. I learned how to remove a component should that situation arise.
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