[racerx]

I need someones help, I did this stuff in college and now cant remember nor can I find anything to tell me what I need. I need to drop 12V dc to 3V dc to run some things in my car. Any help would be appreciated. IIRC, all I should need is an inline resistor.


Brian

 

[MrFroge]

You need a series resistor to drop 9v across (E=IxR) of the appropriate wattage (IxIxRx2) in series with your load, and a series zenor diode of th 3V variety in parallel with the load (a safety device to keep the voltage from going above 3 V) .. But you should realy use a bypass transistor as a regulator..

 

[ND4SPD]

... i was just about to say that ............ j/k :goofy: heh!

 

[racerx]

Thanx for the assistance

 

[01blkcat]

Originally posted by: MrFroge
You need a series resistor to drop 9v across (E=IxR) of the appropriate wattage (IxIxRx2) in series with your load, and a series zenor diode of th 3V variety in parallel with the load (a safety device to keep the voltage from going above 3 V) .. But you should realy use a bypass transistor as a regulator..

That was a damn good explanation :thumbsup:

 

[PGCougar]

Originally posted by: 01blkcat

Originally posted by: MrFroge
You need a series resistor to drop 9v across (E=IxR) of the appropriate wattage (IxIxRx2) in series with your load, and a series zenor diode of th 3V variety in parallel with the load (a safety device to keep the voltage from going above 3 V) .. But you should realy use a bypass transistor as a regulator..

That was a damn good explanation :thumbsup:

I thought we were supposed to talk in English on the boards?

 

[Croat23]

Maybe I'm missing something, but isn't ohm's law V=IR.....what's E=IR?

Mike

 

[1badcat]

e=voltage. i=current. and r=resitance.
E=IR is ohms law.

 

[CougarBalla2k5]

See yall, I know my limits, I can't touch this deep into electrical stuff, so I stayed out

 

[Croat23]

k....i never saw voltage represented with an e.

 

[99CouGSweetRide]

yea, in my physics II class they represented it as an E

Mike