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Old 13th Feb 2019, 8:14 pm   #41
DonaldStott
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Default Re: Turntable Stroboscope

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Originally Posted by merlinmaxwell View Post
If you search for 4060 in Google and select shopping there are loads. As you are running at 4.5V even the HC and HCT series will do.
Are all the prefixes and suffixes just designed to confuse someone like me??

I think this looks o.k. to me: -

https://uk.farnell.com/texas-instrum...07?st=CD4060BE
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Old 13th Feb 2019, 8:25 pm   #42
David G4EBT
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Default Re: Turntable Stroboscope

That would be fine.

The first two letters are of no significance - they just denote the maker.

For example, CD is RCA, MC is Motorola, SN is Texas Instruments.

Note however that while those from Farnell are cheap, they're US stock so you get caught with 15.95 delivery charge.
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Old 14th Feb 2019, 10:48 am   #43
DonaldStott
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Default Re: Turntable Stroboscope

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Originally Posted by David G4EBT View Post
Note however that while those from Farnell are cheap, they're US stock so you get caught with 15.95 delivery charge.
Noted David, thanks.

Managed to find some on eBay from a UK supplier.
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Old 20th Feb 2019, 11:36 am   #44
DonaldStott
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Default Re: Turntable Stroboscope

I've replaced the 4060 along with the 4.9152 MHz crystal just in case that was fried as well.

Rewired my Breadboard circuit with shorter leads and paying much more attention to detail (thanks Trigon) - everything oscillating nicely but not quite the stability I need.

Still some fluctuation (+ - 10-20 Hz) which I assume could be being caused by some back voltage?

Would some judiciously placed diodes help in this instance?

I'm just doing this for my own education and interest (or stubbornness!) as I've also acquired the QX14T50B4.915200B50TT to try out as recommended by Radio Wrangler.
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