[GreenKeys] Jack (K2TTY/K0TTY) Hart's Motor Control Board

[Steve Garrison]

I did notice that on a datasheet that there was a circuit for testing that included pin 6.  I did not surmise from that or from any other notes that I saw that pin 6 was only for testing.  But as they say, live and learn.

 

Steve G./N4TTY

 

From: Gerry <gblock at sbcglobal.net> 
Sent: Wednesday, December 9, 2020 6:05 PM
To: Paul Birkel <pbirkel at gmail.com>
Cc: Steve Garrison <steve.n4tty at gmail.com>; <N4TTY at arrl.net> <N4TTY at arrl.net>; Greenkeys <greenkeys at mailman.qth.net>
Subject: Re: [GreenKeys] Jack (K2TTY/K0TTY) Hart's Motor Control Board

 

Sounds good.  

I’m not sure why the base connection is brought out but I suppose it could be useful for test or other logic functions. 

Sent from my iPhone





On Dec 9, 2020, at 5:30 AM, Paul Birkel <pbirkel at gmail.com <mailto:pbirkel at gmail.com> > wrote:



I’m interested Steve.  Please keep me in mind if you do proceed :->!  Recommend that you check into current parts availability to ensure that you have the right footprints in KiCad.

 

From: greenkeys-bounces at mailman.qth.net <mailto:greenkeys-bounces at mailman.qth.net>  [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Steve Garrison
Sent: Wednesday, December 09, 2020 5:54 AM
To: Gerry Block
Cc: N4TTY at ARRL.NET <mailto:N4TTY at ARRL.NET> ; Greenkeys
Subject: Re: [GreenKeys] Jack (K2TTY/K0TTY) Hart's Motor Control Board

 

Yes, I have finally come to grips with the issue I was having with what I was seeing on the opto-isolator.  And Nick, K4NYW, sent me some scans of the top and bottom of a bare board so that I could confirm the fact that there was no connection to pin 6 of the H11D1.  Have only used Jack's board an not having done any design work with an opto-isolator, I would have thought there would have had to have been a connection to pin 6.  Without a board handy to refer to, I was assuming (I know!) that the board would have a connection and that there was an error on the schematic that had remained undiscovered all these years.  I guess my breakfast this morning could be the egg on my face! 🙂

 

Not having a bare board for a project in mind, I had the bright idea of trying to improve my Kicad skills and recreate Jack's board in a 2020 edition, or 2021 if I don't get busy.  With full credit to Jack for his design right on the board silkscreen.

 

Anyone interested if I'm successful?

Steve G./N4TTY

Sent from my iPhone

 

 

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