This basic circuit showing the LM3914 “inside” was published in the October 1980 issue of Radio Electronics magazine. Note that R1 determines the brightness and that the power supply is 9 V.
This basic circuit was found in the March 1998 issue of Electronics Now magazine. The circuit is...
This buzzer trigger can be used for small alarms. We find it in an 80’s American documentation. The...
This simple circuit was obtained from Popular Electronics in December 1990. The magazine no longer...