[GreenKeys] Mystery RTTY Project

[Jeffrey Golas]

It can, theres a project on hackaday that does work.

Jeff

> On Jul 8, 2023, at 8:56 PM, Ralph Mowery <rmowery42 at charter.net> wrote:
> 
> Seems that the Arduino could be coded to do that and have the 31 ms stop bit.  Most any speed could be set and the cr/lf added after a set number of characters.  
> 
> Ralph ku4pt
> 
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of B. Smith
> Sent: Saturday, July 08, 2023 6:20 PM
> To: greenkeys at mailman.qth.net
> Subject: [GreenKeys] Mystery RTTY Project
> 
> Several have figured out the project. The RY's are generated by sending a square wave using a 555. The 555 then drives an HSR series optical switch which keys the local loop. Dovetron does a similar operation with their RY generator. There are plenty of Chink 555 boards on ePay that are all ready built and cost is around 2 bucks.
> Photo Attached.
> K4CHE
> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
> 
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