As the title states, I'm concerned about the pic drawing current through I/O's when powered off.
In my specific situation I'm reading an analog value and my picaxe is a "piggyback" to another micro controller. Once I turn off the picaxe it'll draw current from the analog input thus killing the signal to the main micro controller. This also happens when reading a digital signal.
For the digital signal I can use a diode as the forward voltage drop should not affect the picaxe. But a diode will not work for the analog signal nor will a resistor as the analog signal can become very low voltage.
Any ideas?
thanks, Zander
In my specific situation I'm reading an analog value and my picaxe is a "piggyback" to another micro controller. Once I turn off the picaxe it'll draw current from the analog input thus killing the signal to the main micro controller. This also happens when reading a digital signal.
For the digital signal I can use a diode as the forward voltage drop should not affect the picaxe. But a diode will not work for the analog signal nor will a resistor as the analog signal can become very low voltage.
Any ideas?
thanks, Zander