That might be because pin 9 is a D input. Look on pin 13(Q2) or 12(Q^2).I cant see my output in pin 9
psst... I never got past Sgt... Gunny is two ranks above...Het, Gunny
Ahh, OK - that's where you got confused.my 1978 National Semi CMOS data book gives pin 9 as the D2 input. My 1991 Motorola CMOS logic databook agrees. Are we talking CD4013 CMOS?
In post #1, you said:
I tried connecting set/reset to + , tried +- and - , it just dont work !
Do you seriously expect us to believe that 4000 series CMOS and 74HCxx series chips were EVER supposed to be pin and function compatible? Sorry chum, but that was never the idea. 4000 series CMOS was a competitor to 74xx TTL and rearranged the pinouts and functions for what seemed at the time like really good ideas to the original designers at RCA, National, Harris and other early CMOS vendors. You really ought to learn some history before you go throwing stones at your predecessors.
I can't follow what you are doing with the poor chip, but hooking Q-Bar to ground is a definite no-no. How about a schematic to remove the doubt and ambiguity. BTW this chip has been happily chugging along for almost 40 years. Any problems you are having are almost certainly your fault, assuming that your previous misadverntures did not fry the little beastie.Heres something frikkin illogical for ya .
Heres what I used to get from my cd4013 when I was pulsing it this way set and reset as shown .
I connect the D,clock ,and Q-bar to ground OR + 5 volts wich is pin 2,3,6 on the 74hc74 , here what I get now with this 74hc74 , total BULLCRAP .
The set positive edge actually ends the Q pulse and the negative edge starts it back up , WTF !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! . The reset just leave a little bump on the high side , it doesnt even register !!
SOMEBODY EVER WORKED WITH THIS CHIP AND KNOWS WHAT TO DO ?
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by Steve Arar
by Jake Hertz