Talk over a long distance on a speaker wire

anon73444976 November 10, 2021, 4:07pm 19

Servo-driven semaphore flags, telephoto lens and OpenCV

Topic		Replies	Views
DTMF and Arduino for very long range communication Interfacing	16	14258	May 6, 2021
Very Cheap Wireless Exhibition	14	4554	May 6, 2021
feasability? General Guidance	16	5050	May 5, 2021
REALLY simple wireless? General Electronics	48	16652	May 6, 2021
Transmit data via audio over RF or phone Networking, Protocols, and Devices	5	13428	May 6, 2021