very good job. I especially like the fact that your using the screw hole as the target; I like the simplicity. Mounting it in a small plastic box might be a good idea to prevent metal chips from causing problems.
You could also mask the sensor off and give it a few shots of spray polyurethane as a makeshift conformal coating. I'm not aware of the long term consequences of using polyurethane as conformal coating would be on the PCB or components but suspect that it would be fine for a hobbyist environment. You can get small batches of conformal coating from places like Mouser; even in dispenser pens which is nice for touch ups and might coat a whole board of this size.
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Jeff Birt |