The documentation for this project says to use a 12v power supply.
However, when I power up the PCB using 12v, and check the voltages on the IC's, all of the measurements are high.
When I use a check the voltages using a 9v power supply, the IC voltages are all within the range listed in the project documentation.
Has anyone had a similar issue with their build?
I think you've misinterpreted what's stated in the doc. It operates on 9v, and the voltages provided are using a 9v supply. But, it should also work with up to 12v. I probably could have worded it a little more clearly there.
Thanks for the clarification on that.
Working on calibration next, so I think I'm good now 8)