Smart, innovative thinking! Glad to help with a #Dewesoft SIRIUS mini!
A potential client wants to capture waveforms with a 200kHz sampling rate from a thermal infrared radiometer. The signals originate from energetic events that take place at long ranges. A radiometer is effectively a calibrated camera with a single large-area pixel – it measures infrared radiation within a cone of sensitivity which is defined by the width of the detector and the focal length of the imaging lens. The ‘frame rate’ can be quite high compared to the typical frame rate of a thermal infrared camera. I hope to build instruments for them and wanted to test a DEWEsoft Sirius Mini digital acquisition system with an appropriately fast pulse of light that would then be picked up by a light sensitive detector to simulate the desired scenario. My wife loaned me an old studio camera strobe which makes 1msec wide flashes of light from a xenon strobe lamp. But what to use to detect the flashes and convert the light signals into voltage waveforms? I don’t have any photodiodes in my toolkit that are unencumbered by circuitry. Hey, how about a solar cell from a barely functioning string of outdoor LED lights that were strung along an ivy-covered fence? I just threw one out yesterday, but I was able to recover the solar cell/battery pack part. The moral of the story clearly is to never throw anything out, even broken junk. 😊 Here are some photos of today’s adventure in upcycling. I got rid of the spider webs inside the housing with an old toothbrush before I rewired it and closed it up again. An old leftover BNC cable conveys the signal to the Sirius Mini input. The vines on the fence wrapped around the cord with tendrils of amazing tenacity, and I now know that a small solar cell is fast enough to convert a 1msec pulse of light from the strobe into a waveform that is a good replica of the flash intensity versus time. The DEWEsoft hardware and software works very well and I plan to use them for this project. Thanks, Dewesoft, for the demo loaner! #dewesoft #recycling #infrared
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