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Posted: **Sun May 04, 2025 5:45 pm**

thoughts on the 74s124 Dual -VCO for breadboard timing?
https://www.jameco.com/Jameco/Products/ ... 298927.pdf
https://www.jameco.com/webapp/wcs/store ... Id=2298927

is it suitable for prototyping?

Posted: **Wed May 07, 2025 3:12 am**

Interesting. I had never heard of it, and checking my data books now, I see they all skip the '124. It looks like the coarse frequency control is the capacitor, and then you can trim the frequency within a smallish range by the input voltages. Another approach to get a variable frequency to test things is my VFOs (variable-frequency oscillators) based on Schmitt-trigger inverters. See viewtopic.php?p=10619#p10619 .

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