Howdy,
    I had an application where I wanted to purchase cheap heatsinks.  I
ended up buying surplus pentium II heatsinks that are not in demand dirt
cheap on Ebay.
Regards,
Mike Kendall
----- Original Message -----
From: Douglas Butler <dbutler@IMETRIX.COM>
Sent: Tuesday, August 28, 2001 11:51:34 AM
To: <PICLIST@MITVMA.MIT.EDU>
Subject: Re: [OT]: How to heatsink a lot of power electronics?

> How about "metal, clamped, and use lock washers."
> More seriously, anything you can do to provide airflow is good.  Of
> course you have to keep the grass clippings from collecting on the
> TO220s.  If your motor has a fan and you can duct the intake over the
> transistors it will help cooling a lot.
>
> Sherpa Doug
>
> > -----Original Message-----
> > From: Byron A Jeff [mailto:byron@CC.GATECH.EDU]
> > Sent: Tuesday, August 28, 2001 9:17 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: [OT]: How to heatsink a lot of power electronics?
> >
> >
> > After years of development ;-) I've finally have my prototype
> > robotic lawnmower
> > platform to a usable state. The most valuable lesson I learned is that
> > everything in the drive path must be metal, clamped, and use
> > lock washers.
> >
> > Next on the agenda is motor control for the drive motors. Bob Blick's
> > discrete h-bridge is a natural for the project. But of course
> > you end up
> > with 8 power transistors, plus another one for the cutting motor.
> >
> > I wanted to get some ideas of the best way to heatsink a
> > bunch of power
> > transistors.
> >
> > TIA
> >
> > BAJ
> >
> > --
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> >
> >
> >
>
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