W
Watson A.Name - "Watt Sun
Guest
I sawed a chunk of PC board off a controller board of a defunct CD-ROM
drive. This was the LED and driver circuit, and it had two '910' or
91 ohm SMD resistors in series with each other and the LED and SMD
transistor. My guess is that this circuit was supplied with 5VDC, so
180 ohms should allow an LED current somewhere in the 12 to 15 mA
range. So what if I go to 6V or so for the supply? What's the max
power dissipation for a resistor that measures about .032" or .8 mm
wide (I can't measure the length because of the solder)?
--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
drive. This was the LED and driver circuit, and it had two '910' or
91 ohm SMD resistors in series with each other and the LED and SMD
transistor. My guess is that this circuit was supplied with 5VDC, so
180 ohms should allow an LED current somewhere in the 12 to 15 mA
range. So what if I go to 6V or so for the supply? What's the max
power dissipation for a resistor that measures about .032" or .8 mm
wide (I can't measure the length because of the solder)?
--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@