Help with PWM controller

[max]

Hi Gary and another clever guys! I need your help.
There are few Schematics PWM controller and I missunderstood which one better for me. I`m making tail brightness regulator (PWM Dimmer) for my Ford Focus 2010 European version. I need P chanel PWM control for automobile.

1st Schem I found looking on google pictures through android phone is: chemelec.proboards.com/attachment/download/114 highlighted in red square - it I do not need, and highlighted in blue square I NEED right?



I made this Schem, but not tested yet, because I did not buy RFP30P06 yet. Than I found another Schem in Chemelec web site chemelec.proboards.com/attachment/download/115


So, which one schem better for PWM Dimmer? I confused... 

Sorry for my eng, I`m trying to improve it.

[Gary Lecomte]

I Don't Believe That First PWM Circuit above is on my New Website: chemelec.com
It is on my OLD,OBSOLETE Website: www3.telus.net/chemelec
And that first one above has a Minor Error for the P-MosFet Version, on Both the Schematic and the PCB.
So I don't recommend building it.
I Should Delete it from that OLD site, but it is impossible to delete it from google pictures!

The Second circuit is Correct, But for the "lower current" you require for your Tail Lights, you will probably only need ONE Mosfet connected to it. (And it is not a problem if you use both mosfets.)

Gary.

[max]

1) Yes, I found first in www3.telus.net and than in new website.
2) I made my own PCB drawing, but what is mistake? I already built PCB...   I thought I will test it with IRF5210 today.
Do I need change something in old schem before testing it?

[Gary Lecomte]

It Will work the way is is, BUT When using a P-Channel Mosfet, the 10K Gate resistor Should Connect to Supply Voltage, NOT to Ground.
Than it will work Better.

[lamazoid]

curiously, where you plan to install this stuff in your car, and for what purpose? :-)