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Old 27th Nov 2017, 5:14 pm   #1
mole42uk
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Default DIY LED clock circuit?

ISTR that, many years ago, one could buy a simple clock kit with an LED display.

I would like to find the clock chip and try one, it needs 0.56 7-segment display and a local oscillator for use on a DC supply.

If I could also get a stopwatch function, that would be ideal.

Does this ring any bells?
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Old 27th Nov 2017, 5:24 pm   #2
G6Tanuki
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Default Re: DIY LED clock circuit?

See here: http://www.decodesystems.com/clock-ics.html
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Old 27th Nov 2017, 5:27 pm   #3
Ian - G4JQT
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Default Re: DIY LED clock circuit?

Have a look on ebay for "LED clock kits". There are some for less than 2 including post from China!

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Old 27th Nov 2017, 5:46 pm   #4
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Default Re: DIY LED clock circuit?

Oh b***ger, G6 (thanks for the suggestion!!!) just ordered one from eBay for 1.77 including postage. I have no idea what I am going to do with it apart from making it and playing. These things take a few weeks to arrive so it is a surprise when it turns up, double the fun.
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Old 27th Nov 2017, 5:52 pm   #5
MALC SCOTT
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Default Re: DIY LED clock circuit?

I bought a couple of these Chinese clock kits. They work fine, but the PP3 battery does not last long, Malc.
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Old 29th Nov 2017, 1:41 pm   #6
mole42uk
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Default Re: DIY LED clock circuit?

Thanks all! I've ordered a couple of the Chinese kits. Now I'll wait and see if they do what I want...
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Old 29th Nov 2017, 2:32 pm   #7
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Default Re: DIY LED clock circuit?

Quote:
Originally Posted by mole42uk View Post
I've ordered a couple of the Chinese kits. Now I'll wait and see if they do what I want...
Hey Richard, I hope they do what you want! Just an idea, have you considered a Nixie tube version?

I made one myself years ago and then bought one in kit form a few years ago. The tubes are the small ex-Soviet types rather than the big orange ones but the clocks are pretty enough. You can buy kits from PV electronics.


https://www.pvelectronics.co.uk/inde...products_id=93

Just an idea!
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Old 29th Nov 2017, 2:47 pm   #8
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Default Re: DIY LED clock circuit?

Also look out for old advance frequency counters. They seem to appear on ebay regularly and the tubes and driver ICs are good. The rest, usually not worth saving.
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