Does the dimension of a crystal/tuning fork matter? \ VOGONS

Does the dimension of a crystal/tuning fork matter?

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First post, by clownwolf

Posted on 2024-08-24, 04:31

clownwolf Offline

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I am building a 386 MB replica.

As seen on the photo - right above R11, the 32.768 Khz Tuning Fork I bought is about half the length and diameter of what the Motherboard expects. Does it matter? Will my RTC still work as normal?

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Reply 1 of 3, by mdog69

Posted on 2024-08-24, 06:38

mdog69 Offline

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In my experience, 32.768kHz crystals only come in one size. You haven't left the leads too long, so I wouldn't expect any issues.

Reply 2 of 3, by Tiido

Posted on 2024-08-24, 09:45

Tiido Offline

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Physical size doesn't matter but what does is the load capacitance figure, which is crystal dependent. Wrong external capacitors in the oscillator circuit will result in slightly off time keeping or at worst no oscillation at all.

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Reply 3 of 3, by clownwolf

Posted on 2024-08-25, 22:44

clownwolf Offline

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Ok thanks. If I do end up having issues, it wouldn't be a big deal if I end up with wrong date & time anyway.

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