Found in a September 1992 Radio Electronics magazine article, this circuit generates a pulse as shown in the graph below the diagram. The timings can be changed by swapping C3 and C7.
This complex circuit with many digital components measures inductances in 6 ranges ranging from 100...
This circuit was found in old publication from 1958. The circuit uses germanium transistor, common in...
Some old analog multimeters use a 22.5 V battery for high resistance measures. These batteries can no...