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Gary @N8DMT<a href="https://mas.to/@hamchallenge" class="u-url mention" rel="nofollow noopener" target="_blank">@hamchallenge</a> HC46S Write a useful computer program. Created SW interface to read a Mini-Circuits ZX47-55 RF Detector using an Digilent AD3 interface module. Used free LabVIEW Community Edition for programming environment. SW provides a nice stable readout of the detector in dBm. Simple calibration values yield pretty-close output level & temp display. This will be a nice addition to the home lab (once the detector module is mounted onto an AD3 interface board). <a href="https://mastodon.radio/tags/HamRadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#HamRadio</a> <a href="https://mastodon.radio/tags/RFTest" class="mention hashtag" rel="nofollow noopener" target="_blank">#RFTest</a> <a href="https://mastodon.radio/tags/Digilent" class="mention hashtag" rel="nofollow noopener" target="_blank">#Digilent</a>

Gary @N8DMTBelieve that I always learn something (sometimes lots!) while writing code for should-be-simple lab projects. This is certainly true with this simple RF power meter project. Here’s the Community Edition LabVIEW front panel that is reading the Mini-Circuits ZX47-55 power detector (via Digilent AD3 converter) while being driven by my ADALM-PLUTO SDR TX output at 100 MHz at -40 dBm. Still more fun ahead with this before calling it good enough. <a href="https://mastodon.radio/tags/HamRadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#HamRadio</a> <a href="https://mastodon.radio/tags/RF" class="mention hashtag" rel="nofollow noopener" target="_blank">#RF</a> <a href="https://mastodon.radio/tags/SDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDR</a> <a href="https://mastodon.radio/tags/Digilent" class="mention hashtag" rel="nofollow noopener" target="_blank">#Digilent</a> <a href="https://mastodon.radio/tags/GoodStart" class="mention hashtag" rel="nofollow noopener" target="_blank">#GoodStart</a>

Søren KjærsgaardI wanted to see if there was any visible pattern in the flicker sequence of the small LED ‘Candle’, so I used the <a href="https://techhub.social/tags/digilentinc" class="mention hashtag" rel="nofollow noopener" target="_blank">#digilentinc</a> <a href="https://techhub.social/tags/digitaldiscovery" class="mention hashtag" rel="nofollow noopener" target="_blank">#digitaldiscovery</a> and recorded two minutes of ‘flicker’. I used some vintage 74LS123 and 74LS132 to ‘signal condition’ so I got two outputs: the raw signal which has PWM (brightness) and a sequence with a pure on/off, stripped from the PWM. I found no reoccurrence during those two minutes 🤷🏼‍♂️ So the random generator is likely based on some analogue circuit rather than being shift register based. Other fun facts: the raw PWM frequency is about 350Hz. I found PWM levels (brightness) from 30% to 90%. It’s mostly 100% on though, only occasionally dipping at those random (flickery) events. And everything in the flicker timing seems to revolve around intervals of 100ms, occasionally a 50ms offset may be added/subtracted, but only once in a while.. 🤔<a href="https://techhub.social/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://techhub.social/tags/testandmeasurement" class="mention hashtag" rel="nofollow noopener" target="_blank">#testandmeasurement</a> <a href="https://techhub.social/tags/xmas" class="mention hashtag" rel="nofollow noopener" target="_blank">#xmas</a> <a href="https://techhub.social/tags/engineer" class="mention hashtag" rel="nofollow noopener" target="_blank">#engineer</a> <a href="https://techhub.social/tags/digilent" class="mention hashtag" rel="nofollow noopener" target="_blank">#digilent</a> <a href="https://techhub.social/tags/siglent" class="mention hashtag" rel="nofollow noopener" target="_blank">#siglent</a> <a href="https://techhub.social/tags/electronicscuriosities" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronicscuriosities</a>

Make:We're really digging the <a href="https://mastodon.social/tags/Digilent" class="mention hashtag" rel="nofollow noopener" target="_blank">#Digilent</a> Analog Discovery 3 USB digital <a href="https://mastodon.social/tags/Oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#Oscilloscope</a>, <a href="https://mastodon.social/tags/WaveformGenerator" class="mention hashtag" rel="nofollow noopener" target="_blank">#WaveformGenerator</a> and <a href="https://mastodon.social/tags/LogicAnalyzer" class="mention hashtag" rel="nofollow noopener" target="_blank">#LogicAnalyzer</a>! Watch <a href="https://mastodon.social/tags/maker" class="mention hashtag" rel="nofollow noopener" target="_blank">#maker</a> Sumit Basra go hands-on with this incredibly capable device as he explores <a href="https://mastodon.social/tags/servos" class="mention hashtag" rel="nofollow noopener" target="_blank">#servos</a> and <a href="https://mastodon.social/tags/PWM" class="mention hashtag" rel="nofollow noopener" target="_blank">#PWM</a> in this informative <a href="https://mastodon.social/tags/video" class="mention hashtag" rel="nofollow noopener" target="_blank">#video</a>! ⚡📊<a href="https://www.youtube.com/watch?v=qxOQeOngKQE" rel="nofollow noopener" translate="no" target="_blank">https://www.youtube.com/watch?v=qxOQeOngKQE</a>

Xasin, Neira & MeshHm... *Very* silly thought, but, how hard would it be to build a little Sample-And-Hold decimation system to add oversampling to the <a href="https://fosstodon.org/tags/digilent" class="mention hashtag" rel="nofollow noopener" target="_blank">#digilent</a> Analog Discovery 3?>200MHz bandwidth components are cheap, same for ns-level time delays for phase shift ICs...A separate circuit could time-stretch a very fast signal to something the AD3 could easily measure at ~1MHz, by taking samples at precise delays after a trigger and "Holding" them to be measured slowly. Only works for repeating signals tho.

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