vibrating box needs led! (help me)

so after gaining inspiration from the bristle bot i made my own thing which is just a 9volt battery a switch and a motor, So far it has been really quite amusing. But I think it could use a little bit of improvement. First off would I need a resistor? And if i wanted to add an LED how would i find out what resistor to use. I got a pack of 20 random mixed ones off electric goldmine so i would want to attach one of those. Help!?

Picture of vibrating box needs led! (help me)
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astrozombies138 (author) 9 years ago
Ok so Im almost ready to buy my resistor, The website I ordered it off of says "Crystal clean giant 10mm LED flashes brightly from a built in IC. Operate from 3VDC or can be used with a 9V battery if you connect an 82Ω resistor in series with one of the leads. At 3VDC the flash rate is about 2X per second." So i need a 82 ohm resistor, but what watt?
Goodhart9 years ago
First off, are you familiar with the color coding on the side of the resistors?
astrozombies138 (author)  Goodhart9 years ago
yup. with the different colored lines
Ok, well, if you know a few specs (LED forward voltage; operating current of LED; and your source voltage, you can use this calculator to figure the exact resistor you need
astrozombies138 (author)  Goodhart9 years ago
would the motor need a resistor too? and if i installed resistors for the led and motor would it be slower and less vibrate ?
That would all depend on the motor; what type and etc.
astrozombies138 (author)  Goodhart9 years ago
gah, im working with a mystery part considering i took it out of a old video game controller
Nothing stamped on it anywhere, concerning power or voltage... I suppose it is a DC motor.
astrozombies138 (author)  Goodhart9 years ago
nothing stamped on it, say i look at the pcb of the controller and traced the path and saw what resistor it used then found out how much power the controller uses
Bravo :-) Well thought out .
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