These circuits were found in the February 1995 issue of Electronics Now magazine. The circuits have normal response in (a), boost in (b), cut in (c), and plate response in (d).
Figure bellow shows how the 4088 or 4018 can be used as a touch switch. Two metal plates separated by 1 mm...
An interesting interface solution that can be provided in some cases is the one shown in the...
Originally created to feed the filaments of a 12AX7 as an audio preamplifier to eliminate the...