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
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
On CMOS circuits you can't leave any inputs floating. Tie them to either Vdd or Gnd.
Natural laws have no pity.' -Robert Heinlein
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 by hamm; 21st June 2009 at 11:54 AM.
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