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SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
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SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
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TX1-3 Optoisolator interface
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For those of you who interface external devices via the TX1-3 outputs, I came across a very inexpensive isolation interface to prevent accidentally damaging these ports. I bought mine from the local MicroCenter store, but there are dozens of dealers on EBAY selling them. They come in either 5V or 12V, and anywhere from 1-16 relays per board. The input is an optoisolator. You apply a ground (from TX1-3), and the relay can safely key any external device.
https://www.microcenter.com/product/486581/keyes-2-channel-5v-relay-module
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Comments
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Super great idea. Tnx
Andy...W3LI0 -
You can even power it off one if the USB ports on your Flex. Good find!0
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Never thought of that. These relay boards are cheap and really easy to work with.0
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Never thought of that. These relay boards are cheap and really easy to work with.0
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And the most common, cheapest, and most available are all 5V, so the idea of USB power from the Flex is super - no 12-to-5v converter needed! Even cheaper.0
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I just used a small 5 volt regulator. This thing draws just a few milliamps.0
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