I have an issue with an input pin. I had a circuit set up with a 08M2 chip that worked perfectly. I now have a different 08M2 chip and am having an issue with an input that didn't exist before. The circuit and code are exactly the same. I also don't have the original chip to put back in.
Basically if I touch the metal case of the power supply and hold the input then it doesn't sense anything on that input. When I remove my finger from the power supply case it triggers that input. I didn't have the issue with the other chip and it is driving me mad trying to mitigate the issue. I've tried making it pull up, an ST input, a straight link on the serial in instead of the resistors, linking 0V to the earth. Is it something that will not be an issue when in an enclosure or, as I don't really want the risk of ghost inputs, is it something that can be dealt with?
Basically if I touch the metal case of the power supply and hold the input then it doesn't sense anything on that input. When I remove my finger from the power supply case it triggers that input. I didn't have the issue with the other chip and it is driving me mad trying to mitigate the issue. I've tried making it pull up, an ST input, a straight link on the serial in instead of the resistors, linking 0V to the earth. Is it something that will not be an issue when in an enclosure or, as I don't really want the risk of ghost inputs, is it something that can be dealt with?