Input scaling and active filter.

22 Apr 2016

/media/uploads/oliverb/partsim-project-1-.png

Trying to deal with measuring a noisy 0 to 5v signal using the MBED A/D I came up with this.

I'm using the MCP602 op-amp powered from 3.3v. The gain is such that it just gets under the op-amp's input voltage limit. The filter is pretty flat to 100Hz, the cut off was near 150Hz. It should be easy to scale to different frequencies.