I am trying to output a slower pulse than is inputted into this mystery IC or circuit. This input pulse is digital and lasts for 1/10 of a second. Is there a chip that would allow me to proportionally slow down the speed of the input but a certain factor?

  • \$\begingroup\$ I used to use 74HC binary/decimal async/sync counters. \$\endgroup\$
    – tlfong01
    Sep 3, 2021 at 0:52
  • \$\begingroup\$ CD4060 with a pot \$\endgroup\$ Sep 3, 2021 at 0:56
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    \$\begingroup\$ In the title you say 12Hz, but in the body you say it 'lasts for' 1/10 of a second. At 12Hz the period would be 1/12 of a second, so what is the actual frequency (12Hz, 10Hz, varying from ? to ?). What is the duty cycle or pulse width, and does either need to be preserved? What is this pulse coming from, and do you have any idea what the 'mystery IC' does? Why do you want to slow it down? \$\endgroup\$ Sep 3, 2021 at 1:59
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    \$\begingroup\$ In this type of situation, it is often best if you can draw a diagram showing how the waveform is now, and how you want it to be. If you could draw a diagram like that and add it to your question, maybe it would keep the question from getting closed. \$\endgroup\$
    – user57037
    Sep 3, 2021 at 5:29
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    \$\begingroup\$ It's really super unclear what you want. What's the relation between input and output signal you want to maintain? I think mkeith is right, this is a situation where it's hard for you to put your requirements into sufficiently precise words to make us understand, so let a drawing be your language – but make sure you label axes (precisely), and clearly annotate what you want to cause what (e.g. with labeled arrows or something). As it is, I'm reading your question, and simply have no clue what you want, and I'm not alone... \$\endgroup\$ Sep 3, 2021 at 11:50

1 Answer 1


There are ICs that produce a digital pulse train whose frequency is some integer division of the input signal's frequency. They are called "divide by N counters". Check these out:

  1. CD4018 (3V - 15V supply)
  2. CD4059 (3V - 15V supply)
  3. 74HC4059 (2V - 6V supply)

You could also use a "rate multiplier" IC, which create fractional output frequencies such as \$ f_{IN} \times \frac{N}{64} \$. Here are a couple:

  1. CD4089 (3V - 15V supply)
  2. 7497 (5V only, ancient TTL device, not recommended)

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