Honda Car Forum

Burt Squareman wrote:

> LoL. Shouldn't we assume that they make cars for smokers.

Good point

>> One of the resistors on my resistor pack (88 Civic) died and I
>> replaced it with a MOSFET (no H-bridge, just a single one)
>> and a little controller that outputs 0..100% PWM, for smooth
>> fan control. Yeah, a bit overkill, but it was fun project
>
> Did you go with an N or P-Channel MOSFET? Let me guess, N-Channel.

Yeah, N-channel in a low side configuration. I actually fitted the
MOSFET and its heatsink onto the piece that usually the resistors are
mounted on to. It was a bit trickier than I thought; try switching a 10A
inductive load without really being able to tap into the circuit. (I
wanted to make it a drop-in for the resistor pack; didn't want to mess
with re-wiring the entire blower, partially because it would have been a
bit of a pain, and partially because I didn't know ahead of time whether
it would actually work

I usually don't design power electronics (not anywhere near) but it was
a fun thing to do. Went through several revisions and only blew one
single FET. Mightily proud of myself, I am

tomb <me@privacy.net> wrote in message
news:xGI3f.2272$BZ5.771@newssvr13.news.prodigy.com ...
> Burt Squareman wrote:
>
> > LoL. Shouldn't we assume that they make cars for smokers.
>
> Good point
>
> >> One of the resistors on my resistor pack (88 Civic) died and I
> >> replaced it with a MOSFET (no H-bridge, just a single one)
> >> and a little controller that outputs 0..100% PWM, for smooth
> >> fan control. Yeah, a bit overkill, but it was fun project
> >
> > Did you go with an N or P-Channel MOSFET? Let me guess, N-Channel.
>
> Yeah, N-channel in a low side configuration. I actually fitted the
> MOSFET and its heatsink onto the piece that usually the resistors are
> mounted on to. It was a bit trickier than I thought; try switching a 10A
> inductive load without really being able to tap into the circuit. (I
> wanted to make it a drop-in for the resistor pack; didn't want to mess
> with re-wiring the entire blower, partially because it would have been a
> bit of a pain, and partially because I didn't know ahead of time whether
> it would actually work
>
> I usually don't design power electronics (not anywhere near) but it was
> a fun thing to do. Went through several revisions and only blew one
> single FET. Mightily proud of myself, I am
>
Deservedly, too!