Can you buy a working radar module for $12 ... circuit and build this amplification circuit for your dirt cheap Doppler module. The module in question is a CDM324 24-GHz board that’s currently ...

If you’re partial to browsing AliExpress, Banggood, or eBay for unusual hardware, you may have seen the HB100 Doppler Radar modules. These are a PCB with a metal can on board, and their reverse ...