Hi,
I am trying to create a stopwatch as a project, however i am having problems using the 4026 chip. (i'm using a 555 as the pulse)
I have created a small version as a test to work out how the 4026 works. This was a success. I made a stopwatch which counted to 99. Now i am tring to use minutes as well.
I'm trying to use logic gates to tell when the counter gets to 59 seconds, then i'm trying to reset the 4026s to 0 and putting the minute display up 1. However the instead of reseting the 7 segment displays to 0 it freezes them on 59 seconds. I discovered this was because the reset has to be release to actually reset the 4026s. So i used an AND gate to use the pulse from the 555 so it when it got to 59, it resets. This misses a second out: it goes ...58, 59, 01, 02... and not ...58, 59, 00, 01, 02...
Is there an easy way to fix this? Also is there an easier way to make this circuit?
I'm sorry if this is hard to understand: i'm quite new to electronics.
Thanks,
jas000
I am trying to create a stopwatch as a project, however i am having problems using the 4026 chip. (i'm using a 555 as the pulse)
I have created a small version as a test to work out how the 4026 works. This was a success. I made a stopwatch which counted to 99. Now i am tring to use minutes as well.
I'm trying to use logic gates to tell when the counter gets to 59 seconds, then i'm trying to reset the 4026s to 0 and putting the minute display up 1. However the instead of reseting the 7 segment displays to 0 it freezes them on 59 seconds. I discovered this was because the reset has to be release to actually reset the 4026s. So i used an AND gate to use the pulse from the 555 so it when it got to 59, it resets. This misses a second out: it goes ...58, 59, 01, 02... and not ...58, 59, 00, 01, 02...
Is there an easy way to fix this? Also is there an easier way to make this circuit?
I'm sorry if this is hard to understand: i'm quite new to electronics.
Thanks,
jas000