[GreenKeys] Interest in a flexible USB-currentloop adapter?

[John Nagle]

    Good idea. But design in a loop supply.  Preferably a modern
one that gets its power from the USB port or a low-voltage power
supply.

    (I've done some designs in simulation.  You really could
drive a 60mA selector magnet from a USB port by using a
DC-DC converter to charge a capacitor up to 120V and
using that energy to pull in the selector magnet.  After
the first 2ms, you only need about 4V.)

				John Nagle

> From:epvgk at limpoc.com
> To:greenkeys at mailman.qth.net
> Subject: [GreenKeys] Interest in a flexible USB-currentloop adapter?
>
> Hi folks -
>
> I'm trying to gauge interest in a usb-serial adapter for talking to teletypes.  I have
> a prototype and software, and if there's interest I can look into having a few made.
> This would be an alternative to the CP2102 based setup some of us are using.