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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EUYGRMBSVQMQUR7EILNW24F2EDBOSDYR/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "6221F5D461334EC491DD790B682B3487@CSI9020",
    "message_id_hash": "EUYGRMBSVQMQUR7EILNW24F2EDBOSDYR",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/EUYGRMBSVQMQUR7EILNW24F2EDBOSDYR/",
    "sender": {
        "address": "scott23192 (a) gmail.com",
        "mailman_id": "120e10e05ba14969a11da0a96d21e355",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/120e10e05ba14969a11da0a96d21e355/emails/"
    },
    "sender_name": "Scott",
    "subject": "Re: [amsat-bb] Falconsat Success",
    "date": "2017-10-22T19:38:42Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Glad to help, Tony.  I'll reply to the mailing list in case anyone else is \ninterested.\n\nFirst, your computer needs a port (usually serial) to trigger the relay.  My \ncomputer did not have one, so I bought a USB > Serial cable.\n\nThere are discussions online regarding that the different types of USB > \nSerial cables do or don't work for this purpose.  The following cable is \nworking well for me:\n\nhttps://smile.amazon.com/gp/product/B006AA04K0\n\n(if you don't already have a charity linked to Amazon's \"SMILE\" program, now \nis a good opportunity to set that to AMSAT!)\n\nAs I mentioned earlier, to make it easier to access the serial pins you \nneed, a breakout adapter is handy.  Others may wish to solder a permanent \nconnection, but I use the following:\n\nhttps://smile.amazon.com/gp/product/B00WW6P636\n\n... and to save people having to scroll through previous posts, here is the \nrelay itself:\n\nhttps://smile.amazon.com/gp/product/B00E0NTPP4   (please note that we'll \nonly be using one of the two relays on that board)\n\nAnd now to actually answer your question, I threw together an ugly image \nfile that shows the physical wiring connections as well as the schematic so \nyou can know what it's doing.  I also included a screen print of where I \nhave the PTT Com port selected in HS_Soundmodem.  Of course the Com Port \nnumber will be different on everyone's computer and on top of that, you \nmight be using something other than HS_Soundmodem to control your PTT from \nthe computer.  But in the following diagram, you can see how I'm setup for \n\"Com15\":\n\nhttp://www.qsl.net/k/k4kdr//files/PTT-relay-wiring-plus-schematic.png\n\n... hope that helps!\n\nYou also asked about drivers, etc., on a Windows machine.  Other than \nallowing the USB > Serial cable to install whatever it needs to download to \nfunction, you'll be fine.  The computer has no idea that the RTS signal on \nyour serial port is controlling a relay.  So, nothing is needed on the \ncomputer for the relay itself.\n\nAnd as for the 5 VDC to power the relay coil, you could certainly use an AC \nadapter of some kind, but I just cut the end off of a short USB printer \ncable and used the red & black wires to give me a convenient 5 VDC from the \ncomputer (or in my case actually from a multi-port, powered USB hub).\n\n-Scott,  K4KDR\n\n\n====================================\n\n\n\n-----Original Message----- \nFrom: Tony\nSent: Sunday, October 22, 2017 2:11 PM\nTo: Scott\nSubject: Re: [amsat-bb] Falconsat Success\n\nScott:\n\nThat's exactly what I'm looking for. The fact that it has isolation is a\nreal plus. Could you pass along a few more details regarding the type of\nUSB cable used and how you wired the relay to your PTT line on the rig?\n\nI'm not much of a PC guy so every bit helps - never home-brewed a USB PTT.\n\nThanks Scott\n\nTony -K2MO\n\n\nOn 10/22/2017 9:39 AM, Scott wrote:\n> Congrats, Tony!\n>\n> The following relay has been working very well for me to handle PTT:\n>\n> https://www.amazon.com/gp/product/B00E0NTPP4/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1\n>\n> ... I use 5 VDC from a USB cable for the coil voltage with the application\n> of that coil voltage being triggered by the serial RTS signal from\n> HS_Soundmodem.  The above relay is great for that since the coil circuit \n> is\n> controlled by an opto-isolator that can be operated by a low level signal\n> like the serial RTS.\n>\n> The following item sure made it easy to attach a pair of wires to serial\n> RTS & ground:\n>\n> https://www.amazon.com/gp/product/B00WW6P636/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1\n>\n>\n> -Scott,  K4KDR\n>\n>\n>\n> ===================================\n>\n> On Sun, Oct 22, 2017 at 4:39 AM, Tony <[email protected]> wrote:\n>\n>> All:\n>>\n>> Managed to work Falconsat this morning using UZ7HO's Soundmodem, WISP and\n>> VSP. I don't have a PTT circuit so I had to use the rigs MOX function to\n>> send file requests. I wouldn't recommend doing that for obvious \n>> reasons --\n>> need to build a PTT circuit ASAP.\n>>\n>> If anyone is interested, this video guide shows the basics on how to \n>> setup\n>> Wisp and Soundmodem using HW-VSP.  See: https://www.youtube.com/watch?\n>> v=1ahlA-bRb5A\n>>\n>> 73, Tony -K2MO \n\n",
    "attachments": []
}