digifarad

Given the fact that many types of capacitor - especially electrolytics,.... have a wide tolerance (20% is fairly common), it is often desirable to be able to measure capacitances both quickly and with a reasonable degree of accuracy (e.g. when constructing precision timer circuits, matching the time constants of several RC networks, etc). Of course a capacitance meter also enables one to measure the value of those piles of unmarked capacitors which end up at the bottom of one`s junk box, or to test `suspect` capacitors for potential faults ...,. in short it represents a useful addition to the test gear of any constructor. The circuit described here offers the advantages of a digital display, has 5 decade ranges, measuring from 1 nF to 9 .999 μ F, and is accurate to about 2%.