This 3-step circuit for generating digital signals was found in the November 1976 issue of Radio Electronics magazine. The maximum frequency depends on the flip flops.
This is a bridge for the measurement of low value resistances and high values too. The circuit...
We found this circuit in a publication for radio amateurs of 1976. The operational amplifier is a...
This circuit, with two operationals, was obtained from an old American publication. Operational...