Last year, I took a look at some mostly low-cost passive infrared (PIR) motion sensor modules. Then recently, I became more aware of cheap microwave radar motion sensor modules. The popular version of ...

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10maurycy10, an engineer who reverse engineers various devices, published the results of his analysis of the microwave radar sensor 'RCWL-0516' that sells for $1 (about 161 yen) on his blog. The ...