Found in European documentation from the 1980s, this circuit was originally designed for computer applications of the time. However, the basic idea can be adapted for use with microcontrollers.
If you have a common analog multimeter, you can increase its input resistance in the measurement of...
This circuit was found in a Texas optoelectronic manual. Observe the polarity of the supply. Other...
This circuit is from 80s documentation and makes use of common operational amplifiers. The...