I'm new to the forum and returning to electronics after about 20 years.
I have two problems the first is that I want to drive a 3 digit LED display to count pulses in increments of 25. ie 025, 050, 075, etc. I think I've got my head around a basic counter and led driver circuit, but can't figure out how to get it to jump in 25's and to drive the 3 digits.
The second problem is that I need to drive a 4 digit LED display driven by a bank of 10 press switches (numbered 0 to 9), such that pressing the first switch sets the first digit and the second switch the second digit etc (pressing the 5th switch should reset the first digit) - I'm stumped by this one and need some pointers in the right direction.
Any help would be very appreciated.
I have two problems the first is that I want to drive a 3 digit LED display to count pulses in increments of 25. ie 025, 050, 075, etc. I think I've got my head around a basic counter and led driver circuit, but can't figure out how to get it to jump in 25's and to drive the 3 digits.
The second problem is that I need to drive a 4 digit LED display driven by a bank of 10 press switches (numbered 0 to 9), such that pressing the first switch sets the first digit and the second switch the second digit etc (pressing the 5th switch should reset the first digit) - I'm stumped by this one and need some pointers in the right direction.
Any help would be very appreciated.