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DonaldStott · 2nd Jan 2019, 7:53 pm

Happy New Year to all on the Forum.

Getting back on track with my planned 300 Hz strobe I managed to borrow a "commercial" product from a friend and took pictures of the board and components - many unmarked!

It's based on a 4.9152 crystal and an HEF4060BP binary counter/divider and oscillator.

What's the easiest way to reverse engineer a circuit diagram from a picture of a board - I'd like to understand what is going on rather than just lash up a DIY copy.

I'll probably need some help in identifying the value and type of certain components further down the line but meantime can anyone identify the diodes in the attached pictures - I can't see any markings?

2nd Jan 2019, 7:53 pm	#12
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,842	Re: Turntable Stroboscope Happy New Year to all on the Forum. Getting back on track with my planned 300 Hz strobe I managed to borrow a "commercial" product from a friend and took pictures of the board and components - many unmarked! It's based on a 4.9152 crystal and an HEF4060BP binary counter/divider and oscillator. What's the easiest way to reverse engineer a circuit diagram from a picture of a board - I'd like to understand what is going on rather than just lash up a DIY copy. I'll probably need some help in identifying the value and type of certain components further down the line but meantime can anyone identify the diodes in the attached pictures - I can't see any markings? Attached Thumbnails __________________ BVWS Member