Re: Electronic, off subject

> I am trying to make a device that will count the number of times a hall
> sensor or an optical sensor (either would work for my purpose) is tripped.
> The total count will never exceed the capacity of a 4 digit display and the
> frequency of the count will never exceed 200/sec. I have read about IC that
> incorporate both a counter and a LED display and only require a connection
> to the sensor and power, but have not been able to locate one or recognize
> it from the the listings of ICs that most supplies provide.
>
> Can anyone point me to the right item or a source that may be able to help
> me.

1. I think Intersil used to make that sort of chip. Where are they now? I
don't know...

2. Red Lion controls make ready to go boxes with display & all. Perhaps
something like this:

http://www.redlion-controls.com/products/batch_counters.html

or this...

http://www.redlion-controls.com/products/preset_counters.html

or maybe this...

http://www.redlion-controls.com/products/totalizing_counters.html

3. If you prefer the homebrew approach, I have some small boards I made for a
project long ago that counted the pulse train from a hall sensor (among other
things) and could output data over a serial interface. Coupled with a serial
LCD display (see below) it would do what you want.

LCDs:

http://www.seetron.com/

http://www.matrixorbital.com/

Matt