This circuit is from the 1992 Radio Electronics Handbook. The components used are from the period, with emphasis on the 2-digit display driver.
This circuit was obtained in an American publication from 1977. The circuit operates in the audio...
This circuit came out in a 1983 English magazine, but it can be easily assembled today, as the...
The figure shows how to use the LM3914 Bargraph with an external reference voltage source. The...