How much zoom is too much zoom?
This is a DIY radar speed sign based on an HB100 doppler radar sensor and a cheap microcontroller (originally an Arduino Nano, now a Pi Pico). The detection range with the stock HB100 antenna is too short for reading speeds of cars, but works well for pedestrians at close range!
This repository includes firmware for both the original project, which used Arduino (C++), and the updated kit version of the project, which runs MicroPython on a Pi Pico. PCB design and fabrication files are also included. Have fun!
Note: Radar speed sign kits ship with a Pi Pico that has been pre-flashed with MicroPython and the latest version of the Pico Radar Speed Sign firmware. Follow the instructions below for updating to new versions of the Pico Radar Speed Sign firmeware or for flashing a Pi Pico from scratch.
First time setup with a blank Pi Pico? Follow these instructions!
Firmware in the code/pico_radar_speed_sign directory can be uploaded to the Pi Pico using Thonny or the Pico W-Go Extension for VSCode. If uploading code using VSCode, open the code/pico_radar_speed_sign directory with VSCode in order to automatically use the settings configured in the .vscode directory and the .micropico file.
The original radar speed sign used code written in Arduino C++. This can be found in the code/radar_speed_sign directory, and is intended to be edited using the PlatformIO extension for VSCode.