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Poor Man’s Digital Counter Using Pedometer There are many
occasions when you may want to count something electronically. Perhaps it is
car traffic on a street or items moving down an assembly line. It might be the
number of times a machine is activated or maybe you want to count the number of
people entering doorway. Commercial counting modules do exist but if you want
to use something cheaper, you can modify a pedometer to do much the same thing....
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PC Based Configurable
Filter uses No Digital Potentiometers: 01/23/03 EDN Design Ideas /
(added 1/05) Modern instrumentation requires digital control signals. These
signals come from a central microprocessor or, in modern context, the popular parallel
or serial PC ports. In recent times, digital potentiometers have eliminated the
hassles from this interface for the analog section. Designers can replace the
resistors of the analog design with digital potentiometers, thus providing the
necessary ......
