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The nature of your question suggests that you are trying to convert 18VDC down to 3.3VDC Perhaps to power a microprocessor running at that voltage. If you just used a simple divider circuit then there would be two resistors involved, not just one. You cannot "take" 18VDC down to 3.3VDC with a single resistor. You could limit current but not "divide" the voltage down. Really a divider circuit is not the best way to do this either because you probably want to draw at least some current at the 3.3V level. A simple divider circuit voltage would be dependent on the load.. So... I would recommend either a switching or a linear regulator (non switching, and not very efficient). There are a bunch of DC-DC switching regulators that would do the job nicely... I like the ST Micro L5981. It will output up to about an amp at 3.3V and work from 2.9V to 18VDC input. You can find the datasheet at
http://www.st.com/stonline/products/literature/ds/13004.pdf
Oh, and I'm not pushing the STMicro solution, there are many other good regulators available from Analog Devices, Linear Tech, as well as TI, and National... So Google a bit and you will discover many things for yourself...
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoA resistor changes current, not voltage.
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Why resistor should disconnected from the circuit when measured the value of resistor?
if not disconnected you will measure the resistance of the circuit in parallel with the resistor.
What is the relation between the size of the resistor and its value?
There is no relation between the resistor's ohms value and its size. The power of the resistor can be seen by its size. If the power is too small, the resistor can be destroyed.
Pioneer a335 amplifier and the volume control resistor has broke i am woundering since they don't sell it no more what the equvilant of the resistor act1047 is?
If you cant find a spec sheet, take out a multi meter, set it to ohm mode and measure the thing. If its a variable find something in the same range, if its fixed you should be able to find a suitable replacement. If its a big resistor make sure you get a power resistor and not a standard ceramic one.
A 5 ohm resistor a 10 ohm resistor and a 15 ohm resistor are connected in series to a 120 volt power source. What is the amount of current flowing between the 5 ohm resistor and the 10 ohm resistor?
The current would be about 20 volts.
Define zero ohm resistor.?
A zero-ohm resistor does not exist, so we are talking about an ideal resistor. An ideal resistor is needed for description in a circuit, where we lump all wire/parasitic resistances into discrete resistors, but the wire joining two discrete resistors is considered to have no resistance. My definition: a zero-ohm resistor is an ideal resistor that does not consume energy when a current exists in the resistor. Alternatively, a zero-ohm resistor is an ideal resistor that cannot sustain any potential drop when a current is on. Thirdly, a zero-ohm resistor is an ideal resistor that will conduct an infinite current when a voltage is applied across it.
What voltage is developed across a 330 Ω resistor if 100 mA of current flows through it?
33V
How do you simplify -33v 70-7v to solve for v?
If you mean: -33v = 70-7v then v = 70/-26 Otherwise not knowing the plus, minus or equal value of 70 it has no solution
How do you change the blower motor resistor on 2007 Nissan Versa?
You will need to change the blower motor resistor by finding it near the air duct system. You will take the old resistor off and replace it the same way.
How do you replace a resistor?
take the old one out and put a new one in.
How do you replace a blower motor resistor in a full size 1992 Chevy Blazer?
take it to a shop and have them do it If it's the same as a pickup, take out the glove box and the resistor should be on top of the heater box. Not much too it.
Where is the resistor block on a '97 Chevy Cavalier?
What do you mean resistor block, what does is do. There is not such thing called that. Controls fan speed... somewhere in dash Blower motor resistor? It's way up under the passenger side of the dash. You have to take the blower motor out. Right up next to the firewall. You should take out the passenger seat to get up in there.
Where is the heater blower resistor located in a 2005 GMC Sierra?
RIGHT HAND SIDE BEANEATH THE DASH THERE IS A BLACK COVER,TAKE THIS COVER OFF AND THE HARNESS PLUGS INTO THE RESISTOR.
Where is the resistor on p reg Nissan Micra?
I guess your talking about the heater resistor? If so i seem to remember them being behind the centre of the dash, take off the trims in the footwells, it will be on the heater box itself that's for sure, so find that, and you will find the resistor.
Is Light dependent resistor an example of resistor?
yes, a variable resistor
How do you replace the Fan Speed Resistor Module on a 1994 Nissan Altima?
The resistor is located in the HVAC blower motor housing, under the glove box [passenger side front wheel well]. Its held in with 2 bolts. Unplug the harness, take out the two bolts and take the resistor card out of the housing. Installation is the reverse of removal. nick.drombosky@gmail.com
How do you replace a blower motor resistor in a 1999 dodge grand caravan?
Just did it. The resistor is behind the passenger strut in the fire wall. Remove the wire from the old resistor, pull out the old resistor (held in by clips in the device. Install the new unit and re-attache wire. The space is tight and should not take you more than 30 minutes.
How long do it take to replace a blower motor resistor on a 2004 Chevrolet trailblazer?
about 5 min.
