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Old 17th Jan 2019, 2:40 pm   #14
DonaldStott
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Join Date: Aug 2015
Location: Glasgow, UK.
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Default Re: Turntable Stroboscope

Looking for a bit more technical assistance as I try to educate myself on how Oscillators and Crystals work in a circuit.

As mentioned above I'm trying to construct a 300 Hz strobe based around a 4.9152 crystal and an HEF4060BP binary counter/divider and oscillator. Looking at the Product data sheet for the HEF4060BP we have the Pin out diagram : -

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I'm confused by how you calculate the counter out values when there is no Q1, Q2 or Q10 - see here for the Pin description table: -

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To get from 4915200 Hz to 300 Hz I need to divide by 2 ^14 i.e. 16384 - so, put simply, what pin would that be??

I appreciate I need to build a circuit involving caps and resistors to get the whole thing oscillating and that a Darlington pair will be required to drive an LED - I'll also need some judiciously place diodes.

Small steps ...
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