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 egg timer has been found in an English magazine that no longer exists in 1982. The...
This circuit was published in an 80's American documentation, but it is still current. The power...
Suggested by an American publication of 1964 this circuit is intended for the capture of signals...