Dual 7 segment counting circuit

[Kerbing]

I have just purchased 2 "Single Digit Counter" Circuits from www.edutek.ltd.co.uk

Is it possible to join these circuits to a Dual Digit counter, capable of counts to 99? Very inexperienced with these circuits, so any hel would be greatly appreciated.

EDUTEK - Electronic Projects for students - Electronic Kits and PCB available, pre-programmed PIC's, Electronic Hobby Projects

Under : GCSE Projects.

Thanks, Ian.

 

[ericgibbs]

I have just purchased 2 "Single Digit Counter" Circuits from www.edutek.ltd.co.uk

Is it possible to join these circuits to a Dual Digit counter, capable of counts to 99? Very inexperienced with these circuits, so any hel would be greatly appreciated.

EDUTEK - Electronic Projects for students - Electronic Kits and PCB available, pre-programmed PIC's, Electronic Hobby Projects

Under : GCSE Projects.

Thanks, Ian.

hi,
Can you see the type number marked on the IC's.?

It should be possible to connect in series.

 

[House0Fwax]

hi,
Can you see the type number marked on the IC's.?

It should be possible to connect in series.

It's the classic 555 , 4026 circuit.

https://www.electro-tech-online.com/custompdfs/2010/04/SDCNTR3.pdf

 

[ericgibbs]

It's the classic 555 , 4026 circuit.

https://www.electro-tech-online.com/custompdfs/2010/04/SDCNTR3-1.pdf

hi,
Thanks for that.

hi Ian,
It will be possible with a small modification to the 2nd counter pcb to enable dual counting.
Do you want to modify the pcb.??

 

[ericgibbs]

hi Ian,
Look at this image.

 

[ericgibbs]

hi Ian,
If you decide to modify the circuit pcb, you could also add this RESET mod that will set the counters to '00'

 

[Kerbing]

Hi, I'll be usng a pressure pad to trigger the count on every second input. Therefore, I wil need to add a 4017 divider circuit? Will this be possible when both counting circuits are joined together?

 

[ericgibbs]

Hi, I'll be usng a pressure pad to trigger the count on every second input. Therefore, I wil need to add a 4017 divider circuit? Will this be possible when both counting circuits are joined together?

hi,
That should be OK, make sure you connect to 0V and +V of the 4017 IC to the display pcb.
For the output of the 4017, the '0' is high when the 4017 has been RESET, so the 2nd pulse will be on output '2'.

How do you plan to reset the 4017 back to zero? '0'

Draw a diagram and post it.

 

[Kerbing]

I have no idea. Like I said, very new to this and working off text book diagrams and little knowledge..

I may be a while with the diagram!

 

[ericgibbs]

I have no idea. Like I said, very new to this and working off text book diagrams and little knowledge..

I may be a while with the diagram!

OK,
Give it a try and we will talk you thru it.

BTW:
4017 IC's and 4026 are CMOS technology are susceptible to electro static damage.
So take when handling CMOS devices, try to wear a earthing wrist strap.

Google: for earthing wrist strap