Simple circuit completion counter

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    Circuit Counter
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A device is needed to count completed circuits with a 4-digit LCD or LED display, registering one count for each closure of input and output contacts. The 4029 counter IC is recommended as a potential solution, along with resources for LED counter modules. It is suggested to use a bounceless switch to prevent false counts, with options for hardware or software debouncing strategies. Additionally, there is interest in modifying an existing counter to detect skin conduction with a resistance over 1k Ohms. The discussion emphasizes the importance of accurate counting mechanisms in circuit applications.
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I need a device with something like a 4-digit LCD or LED display which counts the amount of times its input and output contacts close. Basically, 1 count for each completed circuit. I was told things like these exist and are cheap, but don't know what to call it.

Thanks in advance!
 
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You should take a look at the 4029 counter IC.
Also you might like to see this website that shows http://www.aaroncake.net/circuits/counter.asp"
 
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mikeusru said:
I need a device with something like a 4-digit LCD or LED display which counts the amount of times its input and output contacts close. Basically, 1 count for each completed circuit. I was told things like these exist and are cheap, but don't know what to call it.

Thanks in advance!

Here are the results of doing a Google Images search on LED Counter Module:

http://www.google.com/images?rlz=1T...ule&um=1&ie=UTF-8&source=og&sa=N&hl=en&tab=wi

.
 
Or, if there is a controller / processor in the loop you can save a little hardware and debounce in the firmware/software:

EE Times said:
Consider the simplest of all debouncing strategies: read the switch once every 500ms or so, and set a flag indicating the input's state. No reasonable switch will bounce that long. A read during the initial bounce period returns a zero or a one indicating the switch's instantaneous state. No matter how we interpret the data (in other words, switch on or off) the result is meaningful. The slow read rate keeps the routine from deducing that bounces are multiple switch closures.
http://www.eetimes.com/discussion/break-point/4024981/My-favorite-software-debouncers
 
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Thanks for the help!
So with something like
http://www.quasarelectronics.com/3129-up-down-4-digit-led-event-counter.htm

How would I be able to tweak it to be sensitive enough to respond to skin conduction as a part of the circuit (basically, count a contact with a resistance of over 1k Ohms)?
 
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