I have built this circuit (with AT89S52) but have the following problems:
when I press the start and stop button.... the time jumps an extra second on the LED display.
when i compare the time measurement to an actual stopwatch it seems to lag a few seconds behind (as in just press start on both at same time and compare time without stopping)
When powering up the circuit I have to switch the power supply on and off numerous times before I sucessfully get "000" diplayed on led. Other wise i get random displays, no display, etc. any ideas why?
Is this because I'm using a slightly different microcontroller?
I would also like to display max 9 seconds and rest miliseconds accurately instead of current setup. any help on coding will be great!
How would I go about interfacing this cuircuit with my computer ( i need the recorded times displayed on comp too)
Can i connect 2 microcontrollers recording two sperate times to one parralle port? If os how do I do that?
Possible to have 1. start button, two sperate stops (with 2 separate led displays) on ONE mircocontroller?
THANK YOU SOO MUCH....
time and help greatly appreciated to any of help/ questions....
Look forward to hearing from you.