Alt-BEAM Archive
Message #00718
To: Richard Piotter richfile@rconnect.com
From: Steven Bolt sbolt@xs4all.nl
Date: Sun, 21 Feb 1999 08:16:30 +0100 (CET)
Subject: [alt-beam] Re: stepper motors
On Sat, 20 Feb 1999, Richard Piotter wrote:
> Here is a simple circuit to drive a stepper coil.
>
> +5v
> ___
> |
> o-------.
> | |
> < |
> 1K > |
> < /
> 470 | |<' 1N4001 or equivalent
> o---/\/\/---o---| ,------|<-------.
> from |\ | |
> microcore `---o--o to coil o--o--.
> MJ2955 |
> or equivalent _|_
> = Gnd
>
Why the 1K pull-up on the MJ2955 base? You seem to waste
considerable current.
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# sbolt@xs4all.nl # Steven Bolt # popular science monthly KIJK #
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