Hello. I have been doing a small project for my school which will incorporate the Arduino Uno. My electronics background is still pretty iffy, but I still try my best to take the right precautions. For the project, I decided to do the Arduino synthesizer shown here:http://www.instructables.com/id/Auduino-Lo-fi-Synth-for-arduino/
Now, I finished building it and everything sounds great. BUT as I was lurking around these forums, I ran into a few threads and post about how the speaker should not be directly connected to the Arduino (as shown in the instructable). I'm not sure if I have already permanently damaged my Arduino or not since it SEEMS fine, but I feel like I screwed myself over by following someone on Instructables. So is there actually a proper way in which this synth should be set up or what?
I heard the word "amplifiers" being thrown around, but I don't want to purchase them if I don't absolutely need to. I would gladly appreciate any feedback, comments, etc.
btw, the speaker I'm using is 8ohms and 0.5 W