A Mutable Log

Expensive test equipment with unverified circuit

Expensive test equipment, especially those that have lax input protection, must be the last to be used with unverified circuits and prototype boards. I know it is obvious to the experienced, but nevertheless important to remember. Test the signals with a multimeter or oscilloscope, and ascertain they don’t exceed the input specs of the test equipment. Add that to your checklist if you have a hard time remembering it.