/diy/ - Do It Yourself

>>695472
building this right now, first own Electric project, but have some experience soldering etc. from my job. I don't have a soldering station myself yet, so I use the one at uni. Just noticed I soldered the LED in with wrong polarity. fml
I will take pictures if I can, but I don't own a camera...
I must say though, I am a little confused by the bottom left corner, Why is it driven with 18V? And why is it noted as +9/-9V although the -9V goes directly to ground? Also, wouldn't the LM386 just clip the negative parts of the signal like this, since it doesn't have a negative voltage supply relative to ground?
Oh! And why is there a 1mF cap between the switch and the amp? I'd guess to protect from voltageripple caused by the switch? just a guess tho, I'm confused...
>mfw