This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads. It can also be used for other purposes.
This was the original title given by the publication of the 80s in which we found it. Similar...
This circuit is from the 1983 Intersil manual. The display is a 4.5-digit LCD, and the power...
This V/F converter was published in the June 1991 issue of Radio Electronics magazine. The...