Re: [PSUBS-MAILIST] [Fwd: take some time and view my web sites...]

[atozed@juno.com]

Hi Rick-

$10 in parts and $100 of your time, that is.
You have enough inventing to do without becoming a kit assembler, much
less a circuit designer.
An eBay search for "pwm speed control" gave a single result, 16 ampres,
36 volts, $40.
My advice is: make the sub useable, dive with switches first. Then add
speed control, then maybe USB/joystick. 

Also: How much thrust will your bilge pump provide?

-Peter Korwin

On Sun, 5 Dec 2004 00:19:22 -0800 "Rick and Marcia" <empiricus@telus.net>
writes:
> Warren - I was born in the year of the monkey (per your remark below) 
> but I still have some questions!!!
> 
> If I read your email correctly, it's possible to build a motor speed 
> control for under $10.
> 
> I have a joy stick (USB compatible) that I'm thinking of hooking up
> mechanically to some pots for static maneuvering (sidle, pitch, yaw, 
> heave).
> Would I be able to use the USB function without having to rely on 
> software?
> Or am I better off to just cut the USB cord and go with my original 
> idea of a mechanical connection?
> 
> Why the 555 timer?  Caps?  FET?  PWM?  Vas ist?
> 
> I'm thinking of using simple 12V bilge pumps to generate water jets 
> for static thrust but they're simple on/off's.  Variable speed controls

> on the pumps would be nice if it's simple enough to do.
> 
> Circuit diagrams?
> 
> Rick Lucertini
> Vancouver, Canada
> 
> 
> 
> 
> ----- Original Message -----
> From: "Warren Greenway" <opensourcesub@yahoo.com>
> 
> Subject: Re: [PSUBS-MAILIST] [Fwd: take some time and view my web 
> sites...]
> 
> 
> > Thanks for some real good feedback. I would like to
> > point out, though, that by fly-by-wire I meant using
> > the electric drive motors directly. If it is
> > all-electric then you can upgrade from switches to PWM
> > via potentiometer, to digital, as you see fit or can
> > afford. For instance, you can use a simple 555 timer
> > IC with a potentiometer a couple of caps and a FET and
> > get a PWM with dial-a-speed ability for under $10.
> > Cheap upgrade, reliable, can be built by a monkey, but
> > it has to be all-electric for this to be viable. So,
> > that is all I meant.
> 
> 
> 
> 
>
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