tengel07
Active Member
EDIT: Here's an updated diagram of what I *think* will work and what I suspect worked before thanks to that loose connection.
View attachment 729943
Haha! It's too technical for me. See the post above
i recommend to put the emitter of the transistor to the - of the 5v in (usb).
The speaker has no fixed + and -, the membran must be moving forward and backward around the zero point of the speaker.
For the best working solution to light a led with the sound you need a low or high pass filter to driver the transistor.
An other point: 1k for the led is a bit to high, 470-680ohm are good for best light by 5V input power.
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