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Can anyone help with this?.. I want to control two stepper motors from my BX24 - I have no idea what the stepper motor model is, they are both the tiny ones you get in 3.5" floppy drives. I'm guessing they will operate at 5v but may suck quite a bit of power. I want to use as little outputs from the BX24 as possible. ...OR!.... Does anyone know of another tiny motor and gearbox that will do the same job? Maybe those stepper motors are not the way to go. SMALL is the keyword here. I've looked at the StepU controller. (www.parallaxinc.com) but it is unclear if this will do the job. Cheers all. Nik.

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On Fri, 23 Jun 2000 09:56:09 +0100, "Nicholas Smith" <> wrote: > I want to use as little outputs from the BX24 as possible. Realistically, you can't use the outputs of the BX-24 to drive a stepper motor directly. You need to switch it through some kind of H-bridge or controller. > ...OR!.... Does anyone know of another tiny motor and gearbox that will do > the same job? Maybe those stepper motors are not the way to go. SMALL is the > keyword here. If you want small gearmotors, check out www.micromo.com -- the smallest they have is about 8mm in diameter. If you have lots of money, you can go to www.smoovy.com, they sell gearmotors as small as 3 mm in diameter, although only in two gear ratios (1:25 and 1:125). Check out www.mpja.com, they have a very small (3/8" round, 3/8" long) stepper motor for dirt cheap. Later, Jon -------------------------------------------------------------- Jon Hylands http://www.huv.com/jon Project: Micro Seeker (Micro Autonomous Underwater Vehicle) http://www.huv.com

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I made a circut that uses 3 wires to run a stepper motor. And if you are looking to rune two then it only requires 5 lines. above two it is 2 more lines each. the first is a single step type the second is a 1/2 step type. on Monday I will upload them to the file site. (dxf, dwg, and eagle files) --- Jon Hylands <> wrote: > On Fri, 23 Jun 2000 09:56:09 +0100, "Nicholas Smith" > <> > wrote: > > > I want to use as little outputs from the BX24 as > possible. > > Realistically, you can't use the outputs of the > BX-24 to drive a stepper > motor directly. You need to switch it through some > kind of H-bridge or > controller. > > > ...OR!.... Does anyone know of another tiny motor > and gearbox that will do > > the same job? Maybe those stepper motors are not > the way to go. SMALL is the > > keyword here. > > If you want small gearmotors, check out > www.micromo.com -- the smallest > they have is about 8mm in diameter. If you have lots > of money, you can go > to www.smoovy.com, they sell gearmotors as small as > 3 mm in diameter, > although only in two gear ratios (1:25 and 1:125). > > Check out www.mpja.com, they have a very small (3/8" > round, 3/8" long) > stepper motor for dirt cheap. > > Later, > Jon -------------------------------------------------------------- > Jon Hylands > http://www.huv.com/jon > > Project: Micro Seeker (Micro Autonomous Underwater > Vehicle) > http://www.huv.com ------------------------------------------------------------------------ > IT Professionals: Match your unique skills with the > best IT projects at > http://click.egroups.com/1/3381/8/_/565855/_/961766416/ > ------------------------------------------------------------------------ __________________________________________________ /">http://mail.yahoo.com/

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Check out the UCN5804B. It will drive 5 or 6 wire steppers known as unipolar steppers. You provide it with a direction signal and a step pulse for each step you want to take. That's 2 pins on the BX24 for each motor. Find it at www.findchips.com Marty -- ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

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