Breakout board uses HB100 doppler motion sensor
limpkin has been working on a dev board for the HB100 microwave sensor. He developed a breakout board that allows the module to operate as a motion sensor. “I’m sure you’re quite familiar with the Doppler effect: you send an RF signal at a given frequency to a target, and if this object/person is moving the reflected signal’s frequency will be shifted. The HB100 outputs a low level voltage (few uV) whose frequency represents the speed at which an object is moving towards or away from the sensor. The output can be very noisy, so in addition to amplifying the signal, we need to filter out frequencies that don’t match what we expect from ordinary objects.” His design uses op amps and supporting discrete components to accomplish this.
You can find project schematic, KICAD files and all details on Limpkin’s Blog.
Via the contact form.This entry was posted in components, dev boards, sensors and tagged doppler, motion sensor.