Sunday, December 11, 2011

Lunch Box Amplifier

What I Planned To Build
Initially, I wanted to build a
ribbon microphone from scratch. Because of time constraints and the absurd shipping time on the transformer that was needed for the project, I decided to do something else for this project. I do however plan to build the microphone over January term.

How My Project Changed
What I chose instead of a ribbon mic was a "Sweet Guitar Amplifier" that I found the plans for on Instructables.com (the actual link is here). The original design was built inside of a gum container, and I decided that I wanted to build mine inside of an old-school metal lunch box. I thought that this would make it sound a little bit cooler, and I really liked how it looked.

What I Built
My final project was pretty much exactly what I planned to build after my project idea changed: a guitar amp inside of a metal lunch box. There was a lot of troubleshooting with this project. It worked fine the first time I set it all up with a breadboard, and then again once I soldered it all together. When I put it inside of the lunchbox, however, it didn't work anymore. I took it back out and checked all of the connections and re-soldered a lot of things to make sure that they were connected properly. In the end, I got the headphone jack part of it working fine, but the speaker still won't work. I tried two different speakers with it and it still wouldn't work. I plan on trying more and more speakers and going over that part of the circuit again to hopefully figure out what's preventing it from working properly.


Front View

Top View

Side View

Inside View