BCD chips

[andy_miller_me_]

hey, first time user. I'm at 6th form and am doing a project. I basicly need to cascade 3 BCD ICs (4028 i think) to go to an output of 3 x 4 LEDS. it will be used as a teaching aid to teach binary coded decimal. if anyone knows anywhere i can find circuit help or any info on BCD chips id be well greatful. thanks

 

[Russlk]

Is this what you want to do? A little more description would help.

 

[andy_miller_me_]

I only want a single input, either from a switch or a pulse from another IC. then i would like 3 chips to be connected so that i get a BCD count of up to 999

 

[martinH]

Hows about this one,,0-999 useing single i/p as requested.

 

[andy_miller_me_]

that's perfect. Thanks for your help

 

[Sebi]

Just don't forget debouncing the input when use a pushbutton...