Please Help Digital Clock Schematic Needed ASAP

[bob_the_builder]

Hi

If anyone would like to help and draw a schematic (preferable done on a computer) for a digital clock it will be greatly appreciated. The schematic is only for personal use. The schematic should be a 12 hour clock (including hours, minutes and seconds)

There is what the schematic should include:

- 6 number displays

- Use of transistors

- 7490 and 7447 chips

The 10th hour hand should no display anything until the value is 1 but the 10th min. can display a zero and so will the 10th second.

Thanks for you help, it is super greatly appreciated

bob_the_builder

 

[alec_t]

Try this:
https://www.google.co.uk/url?sa=t&r...rFLqL0CeXd4OPUj3cr6RyBw&bvm=bv.46340616,d.ZWU
You can also try googling for 'digital clock schematic'

 

[gareng]

Im a newbie here. I hd made 24hours clock base of 7490, 7447. But here in this forum had a post of that clock schematic. Mine has a little different of 4 transistor and one more for the second flicker. I go here to looking for a solution of preset buttons to adjusting the numbers. the glitching in a push button switch problem.

 

[gareng]

Im a newbie here. I hd made 24hours clock base of 7490, 7447. But here in this forum had a post of that clock schematic. Mine has a little different of 4 transistor and one more for the second flicker. I go here to looking for a solution of preset buttons to adjusting the numbers. the glitching in a push button switch problem.

here the clock I made that doesnt have preset switch

 

[gareng]

here I post my simple design of 12hours with displaying numbers every 10 seconds for a minutes and 10minutes for an hour. Pulse at input is 1 Hz. May be this is the clock you mean.
Notes: every input pins of 7segments display that connected to 7490 should be add of 330ohm resistor.

 

[gareng]

Sory bob. theres something mistake in the schematic, U16 must be deleted and the 1Hz pulse shoud be connected to Clk1 of U13.