Hey, so I'm just playing around with a usb cable and an LED. I plugged in the usb to my computer and connected ground with the LED ground and the last usb pin (+) to the LED.It stays lit bright. I moved the wire from the usb power pin to the D+ pin. Is it possible that I could send a bit stream through usb that would in turn light up this LED?I'm not even a beginner with usb, drivers, etc. I just had the idea that hit me and wanted to see if it was possible as a sort of show off to friends.
Light up a LED through USB
usb
Not directly, and even if you could, it wouldn't be very useful since the usb protocol constantly sends pings over the wire; the led would probably appear continuously dimly lit.If you wanted, you could make a low-pass amplifier to get it done. If you go this route, check out USB In A Nutshell to learn more about the USB protocol.