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Turd
HG Ruler
Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada
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 Posted: Sat Aug 18, 2007 2:01 pm Post subject: 1.5V LED flasher using clock guts |
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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 
eric |
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JingleJoe
HG Supreme
Joined: 01 Apr 2009
Posts: 52
Location: England
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| Posted: Sun Apr 05, 2009 5:55 am Post subject: |
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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 
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Turd
HG Ruler
Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada
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| Posted: Sun Apr 05, 2009 7:38 am Post subject: |
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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
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eric |
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JingleJoe
HG Supreme
Joined: 01 Apr 2009
Posts: 52
Location: England
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| Posted: Sun Apr 05, 2009 12:54 pm Post subject: |
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Ah like this one? I think I could get one cheaper by buying a cheap crappy clock though 
Also that particular one could give you quite an electric shock
| Quote: | | Operating voltage: 13 165Vdc |
I think they missed thier .'s 
I like that this circuit works from such a low voltage and for so long  I could probably put a big 1.5 V battery in it never have to change it!
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The Green Dungeon Alchemist. |
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Turd
HG Ruler
Joined: 18 Aug 2007
Posts: 274
Location: Saskatchewan, Canada
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| Posted: Sun Apr 05, 2009 1:14 pm Post subject: |
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Yep, they look tike that
| JingleJoe wrote: | | I think I could get one cheaper by buying a cheap crappy clock though |
Thats what I did.
| JingleJoe wrote: | Also that particular one could give you quite an electric shock
| Quote: | | Operating voltage: 13 165Vdc |
I think they missed thier .'s |
| JingleJoe wrote: | | I like that this circuit works from such a low voltage and for so long I could probably put a big 1.5 V battery in it never have to change it! |
The battery would probably die of old age
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eric |
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