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PostPosted: 21.08.2002 23:23 
Hey Japala, I was wondering what kind of mouse you used... it seems to be a regular Microsoft Wheel Optical Mouse [$20 USD], which I have purchased. I was going to do the initial mod, and then add in a 5v LED like you did. Did you also solder in a resistor? I looked closely at the pictures but no resistor is visible... If you did use a resistor, what were its specs?

jsgames@yahoo.com

Thanks alot!


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PostPosted: 22.08.2002 00:20 
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Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
Resistor is quite visible here. That blue component on the right side of that white led holder. Value is something around 120-150 ohms. That value depends on your led so you have to calculate your own values. Just read the basic electricity for modders for more help.

Image


Last edited by japala on 22.08.2002 01:13, edited 1 time in total.

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PostPosted: 22.08.2002 00:20 
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Mini Modder
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Joined: 29.07.2002 22:14
Posts: 39
Location: Calgary, Canada
There is a resistor in there. it really depends on the forward voltage drop of the LED you get. Most of the hyper blue/white have a forward drop of somewhere between 3.6-3.8 V @ 20ma. that corresponds to a resister of somewhere between 70 ohms (5-3.6/.02) and 60 ohms (5-3.8/.02). If you have a LED with a forward drop of 5V (unlikely) then you shouldn't in theory require a resistor unless you need to limit the current.

Here's Japala's picture with the added resistor. It's right beside the white bracket holding the red LED and right above the beige capacitor.. I can't tell the ohmage he used as the blue LED light has obscured the actual color of the resistor bands
Image


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PostPosted: 22.08.2002 00:21 
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Joined: 29.07.2002 22:14
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Location: Calgary, Canada
well looks like I was a little slow. since japala beat me to pointing out the resistor :>


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PostPosted: 22.08.2002 01:15 
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Joined: 24.01.2002 10:09
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Next time it will be you then. It's nice to see that others try to explain these same things so I don't have to do it every time. 8)


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PostPosted: 22.08.2002 01:49 
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Joined: 29.07.2002 22:14
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Location: Calgary, Canada
well it's the least the rest of us can do. since you've gone through all the time and effort to post these on your site. I'm in the process of trying to come up with some decent mod projects. If I pull something together I'll try to make a guide and submit it to you.


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