Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

2 bit down counter

Status
Not open for further replies.

hamm

New Member
i have design a two bit down counter it works well in simulation but when i patch it on breadboard it doesnt count can any one figure it out whats wrong i have attached the circuit in doc file pls see it
 

Attachments

  • lll.doc
    71 KB · Views: 215
On CMOS circuits you can't leave any inputs floating. Tie them to either Vdd or Gnd.
 
Did you connect power & ground to the flip flops & the decoder ICs?
 
thx for reply
yep i observed on simulation when i connect the above circuit to 9v battery once i connect the 7 segment(common cathode) to -ve terminal it becomes short on the other hand when i give a separate ground to seven segment it start counting wts the reason ov it wt should i do on bread board
 
Last edited:
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top