[GreenKeys] Raspberry Pi Teletype..

[Bob Coggeshall]

No problems have been experienced with the higher current / lower voltage;
Better engineers could finesse the current limit resistor value and
determine a lower current which still functions. But the selector magnets
on the '15 look beefy enough to tolerate 10x the amount of current we are
talking about here.

Note also, I've added a support for a USB-connected PC keyboard which
allows the laypeople to type on it, which generates *tons* of interest at
hamfests/makerfaires. The tablet interface is OK if you want to save paper.

On Fri, Feb 20, 2015 at 12:25 PM, <COURYHOUSE at aol.com> wrote:

>  ok in looking at this.... I  notice... "higher voltage and a lower
> current, "  on the selector magnets....    any  problems in the future
> by doing this!?
>
> ed
>
>  In a message dated 2/20/2015 10:07:28 A.M. US Mountain Standard Time,
> greenkeys at mailman.qth.net writes:
>
> this is neat! I  will have to  study it. ed# I have a Pi here  somewhere
> that I  bought and never had the time to interface.....
> Ed#  www.smecc.org
>
>
>  In a message dated 2/19/2015 8:56:43 A.M. US Mountain Standard Time,
> bob at cogwheel.com writes:
>
>  Hi Green Keys -
>
> Just FYI, I published an article on how to interface a current loop tty to
> a Raspberry Pi. I have exhibited it at Maker Faires and it is very well
> received by people of all ages..
>
> http://www.sudobob.com/teletype-pi/
>
> ..c
>
>
> *Bob Coggeshall*
> *KK4LMG <http://www.qrz.com/db/?tquery=kk4lmg>*
>
>
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