Showing posts with label Garage door remote control. Show all posts
Showing posts with label Garage door remote control. Show all posts

Friday, August 31, 2018

Remote controls for garage doors on 40 MHz...


Another post about 40 MHz :o)

The ISM (Industrial, Scientific, Medical) band goes from 40.660 to 40.700 MHz and is intended for use by a range of very low power devices. I came across some information recently about a garage door remote control system which operates in the band.

40.66 MHz 40.7 MHz B 40.68 MHz Worldwide
HÖRMANN HSM4 40 MHZ

40.685 MHz

Hormann Garador HSM4 Garage Door Remote Control Keyfob Transmitter - 40.685MHz - Grey Buttons

It just goes to show that the band is not completely empty and radio amateurs should probably avoid using the ISM band especially in built up areas.