This is my first post to a tech forum.. ever ! (and I've been a tech guy for 20+ years)
I think I foobared pins 2 and 3 (and I've simplified the problem so hopefully someone can help)
I was mucking around with mosfets, trying to get an LED ribbon to come on and off..
I followed this (yeah, I know.. I'm a database guy, not an EE, and I need to learn to read a schematic)
pins 2 and 3 were set to output and everything was cool and working as planned, but I think the wire to the gate (coming off the arduino) touched the top of the transistor and the ribbon lit up.
That's where I believe my problems started.
So.. simple problem... in my "new" arduino sketch, I set pins 2 and 3 to output, and analog write to each pin , value 0.
2 LED bulbs.. ground to aduino going to negative on the breadboard.
short pin on each LED going to negative, pin 2 to long pin on LED 1, Pin 3 to long pin on LED2.
I call a routine to flash pin 2 - aka LED1 (high , wait, low)
LED 1 flashes from very bright to just bright
LED 2 stays lit.
Question: If the pins were totally foobared, would I get any action (would I see any toggling in intensity)
All other pins (from 4 through 13) behave as to be expected.
The crux of the issue is, there's always some current on pins 2 and 3.
Any help is EXTREMELY appreciated !!