Going back to the roots of this blog on this one! When I am doing an electronics project my multi meter is constantly on my desk somewhere taking up part of my limited real estate. So I put it away only to need it a few minutes later! So the thought occurred to me...why not build a multimeter that is small enough to stay on my desk (or even behind it with only the test leads on the desk)? And since it is now hidden behind my desk it will need to have a remote display...so how about having that display on the computer in front of me?
So is born this project: Create a multimeter that can measure voltage (DC only, zero to 30), resistance (zero to 100k), and amperage (0 to 500ma, .5ma resolution). My platform is going to be, you guessed it, an Arduino married to a Raspberry Pi:
My original plan was to use the below schematic as the electronics for my multimeter. It is from this instructable, and as you can see, it is pretty complicated:
Anyway...the electronics that I plan on implementing are less complicated than the above and will be based on this discontinued Sparkfun kit: