Quintessence

I'm confused, are you talking about an electronics simulation program? If so there are a few out there, like Electronics Workbench -- which I am using for school. None of these are in perfectly working conditions there are alot of problems with most of the programs, so if you can make one with a perfect simulation for every working component let me know ;D

I'm just trying to understand, that it needs a clock edge on every count up and count down, so I'm just wondering if i need to wire up two debonuce switches, two clocks to the appropriate frequency...but is synchonization of the clock edge and the count up count down switches needed?

Hi, I'm a new user here, and I was just wondering about how to make a counter to fit my assignment which is as follows: Parking Lot: A parking attendant needs to keep track of vehicles entering and exiting a parking lot in order to allow a maximum of 50 vehicles to be in the lot at any given time. Design a circuit that allows the attendant to add or subtract vehicles as they enter and exit the lot (push one button to add, push another to subtract). Include a design where if the total number of vehicles equals 50, a flashing (1Hz, 75%DC) “Lot Full” sign that’s provided will be lit. The attendant may not increase the number beyond 50, or decrease the number below 0. Include numerical displays with your design. Also, you need to keep track of the total number of vehicles that have entered the lot for the day (maximum 99). A reset is required to start the day with 00 cars. I'd appreciate any input, I decided the easy way to do this would be to use the 74192 counter, but I'm not too sure how to implement it, as we haven't really discussed it in class. I'm guessing I'd also need to divide down the input frequency as well. Thanks