Attempting, and Failing, to make an Audio Amplifier (How not to design a PCB)
Last semester at Uni, I often found myself in front of my computer, watching lectures that I had not attended, either due to clashes or being at an inconvenient time. This got me thinking, could I watch the lectures whilst riding my bike on the trainer? With the cheapest tablet I could find, and a mount to place it on my bike, I jumped on my bike in anticipation of being even more efficient with my time, only to find out that the already quiet audio from the lecture recordings was drowned out by the noise of my trainer, defeating the purpose of doing both at the same time. However, I thought it would be a good excuse to build a simple opamp based amplifier, which should boost the audio levels to an acceptable level. Yes, a software based solution would have been a lot easier, but where is the fun in that? With all of this said, it didn’t work out as I had hoped, and the below video delves into the issues I experienced going from the functioning prototype I had to the PCB implementation.
At the end of the day, it was a rather disappointing result, however I learnt a lot during the troubleshooting process which should help me in the future. I also have a few projects lined up which are simpler electrically, so hopefully they go to plan and I have a new project up in a fortnight or so.