Hi everyone,
I am working on a clock project in my free time and i have run into an issue with the 4017 decade counter. I made a breadboard circuit with the decade counter and powered it without any signal going in on pin 14 (the clock in pin), the LED's i was using on the output pins began flashing rapidly. I did a little probing with my oscilloscope and discovered that each of the 10 pins is going high 6 times a second, which means the chip is triggering at 60Hz. Probably not a coincidence that its exactly the AC line frequency. Ive tried placing capacitors between the chips power in on pin 16 and ground and it didn't help. When i attempt to apply voltage to pin 14 the flashing stops and it will occasionally count forward 1 but after that the chip appears "frozen", and wont respond to any voltage anywhere. I also tried using a voltage regulator and got the same results. Any help would be greatly appreciated.
Thanks
I am working on a clock project in my free time and i have run into an issue with the 4017 decade counter. I made a breadboard circuit with the decade counter and powered it without any signal going in on pin 14 (the clock in pin), the LED's i was using on the output pins began flashing rapidly. I did a little probing with my oscilloscope and discovered that each of the 10 pins is going high 6 times a second, which means the chip is triggering at 60Hz. Probably not a coincidence that its exactly the AC line frequency. Ive tried placing capacitors between the chips power in on pin 16 and ground and it didn't help. When i attempt to apply voltage to pin 14 the flashing stops and it will occasionally count forward 1 but after that the chip appears "frozen", and wont respond to any voltage anywhere. I also tried using a voltage regulator and got the same results. Any help would be greatly appreciated.
Thanks