Re: [CAD_CAM_EDM_DRO] 555 and the like

Check out this link.
look for ede1200 and ede 1204 IC's

----- Original Message -----
From: "Chris Stratton" <stratton@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, May 24, 2001 8:46 AM
Subject: [CAD_CAM_EDM_DRO] 555 and the like


> Two comments on 555 stepper drivers:
>
> Radio shack carries an inexpensive little book on the 555.
>
> An HP deskjet contains an L298 dual H bridge chip. It also contains
> some power supply components that might be useable for stepper drive.
> Of course unless one wants to buy an L297 chopper step->phase chip
> power resistors will be necessary to make an L/R drive.
>
> And for those contemplating servo projects the deskjet has a small DC
> motor (I keep meaning to test it as a tach) with 500-something line
> encoder and HEDS reader module...
>
> Watch your neighbours trash piles...
>
> Chris
>
> --
> Christopher C. Stratton, stratton@...
> Instrument Maker, Horn Player & Engineer
> 22 Adrian Street, Somerville, MA 02143
> http://www.mdc.net/~stratton
> NEW PHONE NUMBER: (617) 628-1062 home, 253-2606 MIT
>
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