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Showing posts with label Doppler. Show all posts
Showing posts with label Doppler. Show all posts

Saturday, April 13, 2019

Simple alarm system with Arduino

original article
   A simple system alarm can be made with Arduino board, a sensor module (sound, PIR, Doppler, etc) and 2 switch or remote control.
   Base schematic is
If use buttons (switches) for control alarmsystem_0.ino is use without change
but is use remote control (singnal in HIGH) must changed in
Also, if sensor is like mine (infrared sensor) sketch is without change
but it easy to change in
for negative logic comand (active in LOW).
    After powered the system, alarm is in stand-by
and after push ON button (or button from remote control), alarm is in waitting mode
If sensor is activated, sound (yellow led in my case) is intermittently powered 10 second or more, depend value from here
   You can see 2 video:
20.04.2019
   I add a new movie with this alarm system using RCWL-0516 Doppler (radar) sensor (this sensor was tested a few time ago an posted at http://nicuflorica.blogspot.com/2018/02/senzor-de-miscare-tip-radar-doppler.html). 
   Default sketch is for power off the alarm system
but you can change to be armed after powered up dthe alarm system