Introduction: Arduino - Panic Alarm, Relay With ALARM. KY-019 Example
Hello world! Today i made an example on the KY_019 Relay module.
In my video i use a Alarm with strobe attached to it, but the strobe is not working because i use a 9volt battery,
and the alarm is 12v. Anyways... it works, and its very simple to build.
Follow the next step for the schematic code & Parts list.