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Craig colliass (Craig_colliass)
Member
Username: Craig_colliass

Post Number: 8
Registered: 3-2007
Posted on Tuesday, March 18, 2008 - 9:59 am:    Edit Post    Move Post (Moderator/Admin Only)
Hi i have got a 24volt led indicator for my heavy weight robot i hope to run it at 36 volts from time to time. what resistor do i have to put in series to adjust the voltage to 24 volts for the LED
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 739
Registered: 10-2004
Posted on Tuesday, March 18, 2008 - 12:50 pm:    Edit Post    Move Post (Moderator/Admin Only)
Craig,

R=(36-24)/I where I is the nominal current (A) drawn by the LED at 24V.
Craig colliass (Craig_colliass)
Member
Username: Craig_colliass

Post Number: 9
Registered: 3-2007
Posted on Thursday, March 20, 2008 - 9:12 am:    Edit Post    Move Post (Moderator/Admin Only)
It is LED 24V Yellow Chrome Recessed - Part No: 2210-020 I don't know the value for I current drawn at 24v. do you have this information?
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 741
Registered: 10-2004
Posted on Saturday, March 22, 2008 - 9:34 am:    Edit Post    Move Post (Moderator/Admin Only)
Craig,

It's a single chip LED and thus draws a standard 20mA so you would need a 600 Ohm resistor of over 0.24W. I would suggest a 680R resistor part number 2001-560 which are supplied in packs of 10 for 39p.
Craig colliass (Craig_colliass)
Member
Username: Craig_colliass

Post Number: 10
Registered: 3-2007
Posted on Sunday, March 30, 2008 - 1:00 pm:    Edit Post    Move Post (Moderator/Admin Only)
That will be on the next shopping list manny thanks

Craig

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