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1.5V LED flasher using clock guts

 
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Turd
HG Ruler


Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada

PostPosted: Sat Aug 18, 2007 2:01 pm    Post subject: 1.5V LED flasher using clock guts Reply with quote

Heres a really simple circuit that I made to flash an LED using the guts from an analog clock mechanism.
Just remove the coil and connect this circuit to the two outputs.
You'll get a two second flash rate. First pulse will charge the cap, the next will put the cap and battery in series with the LED, making it flash.
You can use any old diode, I used a 100uf cap and a red LED.
It will flash for months on a button cell Very Happy




eric
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JingleJoe
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Joined: 01 Apr 2009
Posts: 52
Location: England

PostPosted: Sun Apr 05, 2009 5:55 am    Post subject: Reply with quote

Can you elaborate on this please? When you say analog clock mechanism I think of this ...



but I'm pretty sure that's not what you ment Wink
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Turd
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Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada

PostPosted: Sun Apr 05, 2009 7:38 am    Post subject: Reply with quote

I was talking about the ones you put an AA battery in. You can find them cheap at the dollar stores.
The circuit was a replacement for the LM3909 chip Very Happy
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eric
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JingleJoe
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Joined: 01 Apr 2009
Posts: 52
Location: England

PostPosted: Sun Apr 05, 2009 12:54 pm    Post subject: Reply with quote

Ah like this one? I think I could get one cheaper by buying a cheap crappy clock though Rolling Eyes
Also that particular one could give you quite an electric shock Wink
Quote:
Operating voltage: 13 165Vdc

I think they missed thier .'s Laughing



I like that this circuit works from such a low voltage and for so long Smile I could probably put a big 1.5 V battery in it never have to change it! Laughing
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Turd
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Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada

PostPosted: Sun Apr 05, 2009 1:14 pm    Post subject: Reply with quote

JingleJoe wrote:
Ah like this one?
Yep, they look tike that Very Happy

JingleJoe wrote:
I think I could get one cheaper by buying a cheap crappy clock though Rolling Eyes
Thats what I did.

JingleJoe wrote:
Also that particular one could give you quite an electric shock Wink
Quote:
Operating voltage: 13 165Vdc

I think they missed thier .'s Laughing
Laughing



JingleJoe wrote:
I like that this circuit works from such a low voltage and for so long Smile I could probably put a big 1.5 V battery in it never have to change it! Laughing
The battery would probably die of old age Laughing
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eric
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