Forum 2005-2010 (read only)
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Nov 07, 2007, 03:30 am
I'm trying to create a matrix of 12 LED's, 4 of which will be dimmable with analog values, and they are using pins 5,6,10,11. The problem I'm having is that 5 and 6 are analogWrite to 0, yet the LED's are glowing at a very low level. I'd like to know if there is a trickle voltage or some sort of setting which is providing constant voltage from the 5 and 6 pins that I can't override with analogWrite.
Nov 25, 2007, 03:49 pm
I tried it and you're correct. I used pin 5 and it's fine digitally, the minute it gets a analogWrite it will never go completely off even if I set it to zero with analogWrite
In setup set the offending pins as outputs. analogWrite doesn't care
When ever you need a zero digtalWrite(pin, LOW);
I just tried this and it worked. I tried setting the internal pullup on and off with no effect so I'm not sure why those pins are acting up.
If it was designed by man it can be repaired by man.