In this video I re-engineer a 40MHz garage door opener and build a small one for my Harley. I use SDR radio and Audacity to do the hacking and an AD9850 DDS and an Arduino to create a clone.
The principle shown here can also be used for openers or key fobs operating on other frequencies.

Links:
FM modulation with AD9850: https://zissisprojects.wordpress.com/...

Port Manipulation with Arduino: https://www.arduino.cc/en/Reference/P...

Files:
https://github.com/SensorsIot/Garage-...