Hi guys. I am looking for an idea of how to make a decade counter count forward and with a pulse count in reverse then with another signal count forward again. Basically it is like a human counter that is attached in a door to count how many is inside a building or a room. I have looked up for counter circuits but they only do a single function- either count forward or count reverse. Is this idea possible?
We have a limited supply of parts here so we have no access to any advanced devices such as microcontrollers but we still have ICs. Anyway, thanks in advance
Here is a video i found but i'm not spanish so i could not understand. but the video shows a count forward and back.
http://www.youtube.com/watch?v=okG5dRIab60&feature=related
We have a limited supply of parts here so we have no access to any advanced devices such as microcontrollers but we still have ICs. Anyway, thanks in advance
Here is a video i found but i'm not spanish so i could not understand. but the video shows a count forward and back.
http://www.youtube.com/watch?v=okG5dRIab60&feature=related