This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset current setting. The configuration can be adapted to operate with modern equivalent components.
This circuit was found in Electronics Today International of the 80's. The circuit uses still...
This circuit detects traffic problems on a miniature railway by triggering an alarm. The circuit was...
Found in old American documentation, this receiver transmits signals via the power grid. We can...