Hobby Electronics Basics Light on a string?

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Subject Author Date
Light on a string? chesemonkyloma 04-16-08
Posted by on April 16, 2008, 9:39 pm
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My sister would like to use a light on the end of a string, and I was
wondering how that could be made. I was thinking of putting a bright
LED, and resistor, and some hook-up wire in a clear, plastic ball or
even in some Saran Wrap with a battery to power the circuit. This may
be completely implausible, I don't know.

Posted by Bob Monsen on April 16, 2008, 10:00 pm
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> My sister would like to use a light on the end of a string, and I was
> wondering how that could be made. I was thinking of putting a bright
> LED, and resistor, and some hook-up wire in a clear, plastic ball or
> even in some Saran Wrap with a battery to power the circuit. This may
> be completely implausible, I don't know.


9V battery + ------- 1k ohm RESISTOR ---- LED ---- 9V battery -

Wrap it in saran wrap, and you have a light on a string... ;)

The long lead coming out of the LED should connect to the resistor, not
the - side of the battery. The resistor doesn't care.

You can get LEDs and resistors at radio shack, frys, or online at
www.goldmine-elec.com, www.digikey.com, www.mouser.com, www.futurlec.com,
www.arrow.com, etc.

Regards,
Bob Monsen


Posted by Skrapasor on April 16, 2008, 10:12 pm
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>
>
> > My sister would like to use a light on the end of a string, and I was
> > wondering how that could be made. I was thinking of putting a bright
> > LED, and resistor, and some hook-up wire in a clear, plastic ball or
> > even in some Saran Wrap with a battery to power the circuit. This may
> > be completely implausible, I don't know.
>
> 9V battery + ------- 1k ohm RESISTOR ---- LED ---- 9V battery -
>
> Wrap it in saran wrap, and you have a light on a string... ;)
>
> The long lead coming out of the LED should connect to the resistor, not
> the - side of the battery. The resistor doesn't care.
>
> You can get LEDs and resistors at radio shack, frys, or online
atwww.goldmine-elec.com,www.digikey.com,www.mouser.com,www.futurlec.com,www.arrow.com,
etc.
>
> Regards,
> Bob Monsen

Wait, how do you connect the battery then? Negative terminal-wire-
resistor-LED-wire-positive?

Posted by Skrapasor on April 16, 2008, 10:13 pm
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Or would one lead of the LED go to the resistor and the other lead to
the battery? Also, how do you hook-up a lead or wire to a battery? I
am really new at this.

Posted by Allen Bong on April 16, 2008, 10:48 pm
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> Or would one lead of the LED go to the resistor and the other lead to
> the battery? Also, how do you hook-up a lead or wire to a battery? I
> am really new at this.

Hook it up like this. I hope this is clear enough.


1K resistor
.-----------. ___ long lead of LED
| | +-|___|----------------------+
| +||-+ | __
|9V battery | +--------| \ LED
| -||------+ | )
'-----------' | +-----|__/
+--------------------------+
shorter lead of LED



(view in fixed text or courier)

(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)

Allen

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