How To Build A Customized Counter?

[yash.ch]

Hi guys,

I'm trying to build a customized counter which will also act as a switch. It needs to have 3 displays. The first one will show time and should be restarted everytime someone restarts the switch. The second on will display a count based on the amount of time that has passed by. For the first 10 mins it should display 5 and post that for every 2 minutes passing by the count should increase by one. This should also restart with the timer. Finally there should be a third display thats sums up all the counts of the second counter. This should not be resettable.

Lets take an example to understand:

1st time it is switched on:

Display 1: shows time in minutes and seconds.
Display 2: shows 5 for the first 10 minutes and increases by 1 after every 2 ins post that. Example: between 10 and 12 mins it should show 6, between 12 and 14 mins it should show 7 and so on.
Display 3: this will show the sum of all the values display 2 has shown in the past.

I would really appreciate if someone could guide me as to how to make the circuit and what components I will be needing for it.

Thanks!

 

[Ian Rogers]

No disrespect intended here but!!! If you haven't started building as you do not know what components to use....

I think that a complex circuit such as this shouldn't be your first counter!!! Even getting a counter to read seconds and minutes is a task for a first project...

If I were you I would get a couple of quad flipflops and try and count to sixty with a reset!! Only then will you be able to proceed

 

[AnalogKid]

While it is entirely possible to pile up a bunch of counters, comparators, and gates, decoders, and displays to achieve your operation, it will be a large pile. And this is before filling some important details like how many digits for each counter. OTOH, this is an excellent example of an upper-middle level microcontroller project, the kind of thing an Arduino or PIC was built to do.

ak

 

[yash.ch]

I was planning on using an IC for the time counter bit. I actually need help figuring out how to interconnect the 3 displays as per the relationship between the 3. I'm more than willing to put in the time needed to make this work, and really appreciate any help with it.

 

[yash.ch]

AnalogKid yeah arduino would be great if it could do this. Max displays would be as follows:

Display 1: 99 mins
Display 2: 99
Display 3: 9999

Display 3 should have a manual reset button as well.

Thanks for the help

 

[Ian Rogers]

If you used a micro It would be a whole lot easier!!!

A 2 x 16 LCD will display all the values...