This low-power circuit was found in the March 1990 issue of Radio Electronics magazine. It consists of a tone control solution for portable turntables.
This circuit is from the LM3914 manual and can be found elsewhere on this site and from other...
Coupled to a bell, this year 2000 circuit provides an indication for attendance, if the person is...
This constant current charger from 1997 Linear Technology Applications uses common components at...