rodbare
Newbie level 4
Hi!
Driven common anode seven segment led,+12V power,scanning display,6 meters RV cable(impedance unknown).it is not work properly,it is always display "8".The signal is properly at input pin of uln2003 and the base pin of 8550,but the signal is very distortion at the output pin of uln2003 and the colletor pin of 8550.I know it is about due to transfer cable error,but I don't know how to solve it!Pls give a hand!Thanks!
Driven common anode seven segment led,+12V power,scanning display,6 meters RV cable(impedance unknown).it is not work properly,it is always display "8".The signal is properly at input pin of uln2003 and the base pin of 8550,but the signal is very distortion at the output pin of uln2003 and the colletor pin of 8550.I know it is about due to transfer cable error,but I don't know how to solve it!Pls give a hand!Thanks!