Reverse the voltage?

[stevew]

The MCP6021 is a FET OpAmp specifically designed for single ended 5V supply operation and rail to rail operation. You can power this from your USB 5V supply line.

I take it that C1 is a 10,000pf ceramic capacitor?

Thanks for your help on all of this, I'm still learning...

 

[CDRIVE]

I take it that C1 is a 10,000pf ceramic capacitor?

Thanks for your help on all of this, I'm still learning...

Yes, I would have written it as .01uF but my software formats <1uF as nF. I prefer uF & pF.