This 555 IC circuit was found in the November 1994 issue of Radio Electronics magazine. The circuit can be powered by voltages from 12 to 24 V.
This circuit automatically inverts the test leads connection according to the polarity of the...
This circuit was found in a publication from the 90s. The circuit can be assembled with modern...
This filter, from an audio publication from 1977, passes the frequency range corresponding to the...