Hybrid Car – More Fun with Less Gas

Water Collection Project - Page 4

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Posted by Jim Rojas on January 29, 2011, 4:08 am
Curbie wrote:

There's nothing magic here...you might be thinking of Disneyland...

Jim Rojas

Posted by Daniel who wants to know on January 29, 2011, 9:37 am

Anyone who claims to have made a PWM circuit speed up a DC motor VS direct
connection is claiming magic, or has never used a simple cordless drill
(hint: that whining/whistling noise it makes when you lightly pull the
trigger is the PWM slowing the motor down).  When you pull the trigger all
the way the motor is hooked directly across the battery.

Posted by Jim Rojas on January 29, 2011, 1:15 pm
 Daniel who wants to know wrote:

I have the entire collection of Ryobi 18v power tools. I got tired of
replacing the batteries every few years. I now use a 24V battery bank
using 2 12V 8AH Sealed Gel Cell batteries. My drills now spin faster, my
saws do not bog down. Is this magic? Hardly.

I don't understand som of you guys...everything is impossible unless it
is commercially available?

I enjoy finding solutions to everyday problems. Most of you are content
with sticking your heads in the sand.

Jim Rojas

Posted by Jim Wilkins on February 4, 2011, 12:20 pm
An old bed sheet over screening filters my oak-contaminated roof
runoff well enough that the cistern water at least looks clear and the
plastic liner has only a thin biofilm on it.


Posted by Jim Rojas on January 29, 2011, 3:01 pm
 Daniel who wants to know wrote:

Daniel. Pulse width modulation isn't magic. It is done everyday.
Variable speed drills, 220v & 440vac motors have drive controllers that
do just that. Take one apart someday. You might be pleasantly surprised.

Once the lightbulb in your head comes on, then the possibilities are
endless. You can do alot with any PWM circuit.

Jim Rojas

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