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Ham Radio Workbench Podcast Episodes

BayCon 2021 Station Automation

2/9/2021

7 Comments

 
Picture
​It's time for BayCon once again! In this episode, Mike Walker VA3MW walks us through his station automation and talks about leveraging Node Red for control.

PERMALINK - https://www.hamradioworkbench.com/podcast/baycon-2021-station-automation

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Intro to Station Automation Video - https://youtu.be/AJGhu8r7cYU?t=11671

​Using Node Red for Station Automation Video - https://youtu.be/AJGhu8r7cYU?t=15234
7 Comments
ed wilson
2/9/2021 13:23:39

Is there a link for the Amazon Relay that was recommended?

Reply
George Zafiropoulos
2/9/2021 13:53:26

Hi Ed,
Which relay are you referring to?
George

Reply
ed wilson
2/9/2021 14:14:45

You guys were talking about. $10 4 channel relay board from Amazon. Said it would be good to use as an introduction to node red.

Norman L Lastinger
2/9/2021 16:47:10

I can't find that relay

Reply
Eric Gunter
2/14/2021 16:18:33

Is it this one, or similar enough?

https://www.amazon.ca/SainSmart-101-70-101-4-Channel-Relay-Module/dp/B0057OC5O8

Reply
George Zafiropoulos
2/14/2021 16:23:35

That board will work electrically but will not just mount to the top of the Raspberry PI. Go to Amazon and search for "4 relay board raspberry pi". You will find several that will plug on top of the Raspberry PI board.
It boils down to how you want to mount the relay board. If you don't want to mount it to the top of the RPI, then just about any relay board that has built in buffering circuits to the RPI will work. In other words, you need a transistor or opto coupler with a buffer transistor to pull the coil. Without that, the RPI can not sink enough current to actuate the relay and you need a reverse diode across the keying transistor to prevent reverse voltage from blowing up the RPI.
Look for something like this...
https://www.amazon.com/MakerFocus-Raspberry-Expansion-Programming-Programmable/dp/B07Y54FKC6/ref=sr_1_3?dchild=1&keywords=4+relay+board+raspberry+pi&qid=1613337592&sr=8-3

John Hall
2/9/2021 19:40:15

If jitter is a problem sending CW over ip, why is it not a problem receiving CW over ip? Yes, Winkeyer is an elegant workaround, but is an on-off cw keying signal more prone to jitter than a received audio stream, and if so why? And if a stream is not affected by jitter, could you not just key your xcvr with an audio stream over ip (like MCW) and decode it back to key a relay on the xcvr end?

Reply



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