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Wondering what what be the easiest (least component count/passives only) of getting a single pulse from a CD4060? Looking for a delay of about 10 seconds generating a single pulse of about .25 second when the chip is first powered up. I have the values for the RC network to get the 10 second delay, but the pulse is also about 10 seconds long, and this repeats endlessly. I have tried a simple transistor/capacitor/resistor circuit as well, but I don't have the appropriate values in house during social isolation... Thanks for the help! enter image description here

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  • \$\begingroup\$ Datasheet links always an excellent idea. Your spec is not wholly clear. || Power up, 0.25S pulse, 10 seconds delay, then what is WANTED? . A cap from on pulse to transistor base with res base pulldown will give you a pulse at start. But what happens when the 10S is finished. And what do you want done with pulses during interim etc. The overall solution is probably quite easy once we know the full requirement. \$\endgroup\$ – Russell McMahon May 3 at 21:15
  • \$\begingroup\$ What clock frequency are you providing, and what output are you monitoring? Are you willing to other logic ICs? What logic series? Why do you think that a CD4060 is a reasonable choice for what your want to do? \$\endgroup\$ – WhatRoughBeast May 3 at 23:14
  • \$\begingroup\$ I'd use a 74121 or 74123. Doesn't need a clock source. Just works, glitch-free. Do you require the use of a CD4060? \$\endgroup\$ – jonk May 4 at 2:05
  • \$\begingroup\$ The sequence is power up, wait about 10 seconds, then a single .25 second (give or take) pulse. There is no clock. The power up is a continuous 12v signal that has a duration of many minutes/hours before turning off. The pulse it to provide a single pulsed ground signal to another circuit in an automotive application. I just happen to have CD4060 at hand... Yes, a 74121 is probably a better device, i just don't have one at the moment... \$\endgroup\$ – handyguy May 4 at 3:33
  • \$\begingroup\$ Please add the circuit diagram that does not work and explain graphically what you want to achieve. \$\endgroup\$ – skvery May 13 at 19:58

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