[GreenKeys] So what else can I do with this?

[drlegendre .]

Doing the line polarity reversing control is easy with the C-64. All you
need do is wire up the line through a DPDT relay (rigged for polarity
reversal), and power the relay coil directly off the 5V (or is that 9V?)
cassette port motor control line. IIRC, that line is good for 200mA or
better.

Simple BASIC pokes will toggle the cassette motor line, trigger the relay,
and flip the polarity as needed. Easy as pie, no additional circuitry or
power supplies required.

On Sun, Apr 3, 2016 at 6:50 AM, Jeffrey D Angus <jdangus at att.net> wrote:

> On 4/2/2016 11:42 PM, drlegendre . wrote:
>
>> I've pretty much done what I need to do with my M15 / C-64
>> project, but I still have this M15 sitting in the shop.
>>
>> So just what the heck do you guys do with these old girls? I've
>> heard tell of Internet TTY and so forth, but how would that be
>> approached?
>>
> With a model 15, I would suggest the "45 baud" card.  As I have
> mentioned previously, it's not the card that sets the baud rate, it's
> the i-Telex controller that sets it. The "45 baud" Is a simpler interface
> that the TW-39 card which is needed to talk to the call control units.
>
> So, basically what you need is:
> From Henning
> i-Telex card
> 45 baud card
> power supply card
> back plane
> From elsewhere
> two 15 vac transformers
> autostart for the M15.
> And, of course, an internet connection.
> '
> Or, you could get the TW-39 + serial card.
> Use the C-64 on the serial port, and make up a line polarity
> reversal control to turn on the M15. ;-)
>
>
>
>
> --
> Jeff-1.0
> wa6fwi
> http://www.foxsmercantile.com
>
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