Well I'm new at this. I can make anything out of scraps laying around. When i came across the arduino, i thought that sounds kool. But ive been trying for 2wks to add a buzzer to a demo sketck with no success. Frustrated i was playing around wiyh powered bread board. WHERE'S WHAT IM GETTING TO. 5V TO 10KPOT RUNNING A 5mm YELLOW LED AND A ACTIVE BUZZER. LED STARTS OFF AS I TURN UP THE POT it gets briter yellow but just before i max out the pot the led turns red. The pot doesn't effect the buzzer. But the buzzer effects the led some how. Can anyone explain what is going on? This arduino thing is driving crazy
I've never heard of that happening but you are probably on the verge of burning-up the LED (and possibly the Arduino too)!
LEDs should ALWAYS* have a current limiting series-resistor (about 200 Ohms usually works).
It's also unusual to use a pot on an active buzzer.
But ive been trying for 2wks to add a buzzer to a demo sketck with no success
What demo sketch? What's the project supposed to do?
Do you have a link to the buzzer specs?
Can you show us a schematic.
- High power LEDs usually have a different kind of current control/limiting circuit.
A change in colour indicates you'll stressed the LED way past its absolute maximum and likely damaged it.
I suspect this is a heterojunction/quantum well LED, and you've completely overwhelmed the device with
injected charge carriers and they are recombining in the wrong parts of the device. Overheating will cause
re-distribution of diffused dopants and impair the device before it fails completely.