We found this circuit in the Audio Handbook of the National Semiconductor of 1977. The circuit is used to recover vinyl media for recording on other media.
Maxim MAX16813B 4 Channel LED Driver These Maxim Integrated LED drivers are available from Mouser...
Figure shows the basic application of a data selector using the 4051 . The same configuration is...
This crystal configuration can be made with triggers of any logic. The frequency is given by the...