The circuit shown with the LM3914 was found in the March 1992 issue of Radio Electronics magazine. The circuit has a full-scale adjustment.
This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is...
This Popular Electronics circuit can be found in various versions on this site and in this...
June 2017 - ECM032 series of SMD quartz from ECS crystals can now be obtained from Mouser...