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If no what’s the matter of my circuit?
Do not, ever, disconnect the VCC pin when debugging, because that 74hx76 chips. I’m building a simple ring counter with two jk flip-flop. I’ve a button that sets the starting 1 in the first jk, so I think that the problem isn’t about Preset or Clear pin.
I initialize the first jk with 1 using a button and preset and clear pin.
SGS Thomson Microelectronics
Home Questions Tags Users Unanswered. Email Required, but never shown. On CMOS parts, 74h76 unused inputs must be connected, directly or through a resistor, to either Vcc or ground, whichever is required to make the part work 74ch76 required. Sign up or log in Sign up using Google. It means that if I wire pin 5 to Vcc I got always 10 output.
I’m using 74HC76 integrated that contains two jk. Thanks for your advice.
The problem is that in the circuit that I’m observing on my desk the ring counter only works when pin 5 Vcc is unwired. About Preset and Clear pin I’m managing them well: How do you ensure this?
74HC76 Datasheet PDF Motorola => Freescale –
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