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Continuing our series of articles describing low-cost air quality sensors (LCAQS), this month, we take a close look at a sensor module based on photoacoustic spectroscopy or PAS. It’s the Infineon XENSIV PAS CO2 mini-board. by Jim Rowe
Our recent article took a look at low-cost air quality sensors and sensing modules, explaining what they do and how they work. Here’s a more detailed investigation of some of the currently available MOS (metal oxide semiconductor) type sensor modules. by Jim Rowe
The CJMCU-7620 can sense and recognise gestures made with your hands and can be connected to an Arduino or Micromite. It comes as part of a module sized just 16 x 20mm for under $20. by Jim Rowe
These three wideband HF-UHF amplifier modules are said to provide 20dB of gain with frequency ranges of 1MHz-3GHz, 5MHz-6GHz and 50MHz-4GHz respectively. by Jim Rowe
Geekcreit’s low-cost LTDZ V5.0 spectrum analyser can perform analysis over the range of 35MHz to 4.4GHz. It’s controlled from a PC via USB, and includes a tracking generator, RF amplifier and more. by Jim Rowe