Can I use a relay module to switch on & off a door alarm (1.5 V × 3)? Basically, can a relay switch work in this low DC power?
Also, I'm trying to make an alarm system which emits high noise when a particular set of sensors are triggered, so what I have done is that I have salvaged an old door alarm which will emit the sound and in order to do so I have to switch it on or off as per the sensor.
So, I am thinking of using relays; or if you can suggest any better option you are most welcome.
- I'm using Arduino for the sensors & programming related to triggering the alarm & the alarm that I have salvaged is this one.
The Arduino and the Alarm are independently powered.
Since the alarm is independently powered by 1.5v * 3 batteries, can I use Relay just to switch on & off it via the Arduino? As all the videos & articles about relay are dealing with high voltage mains power, switching bulbs, fans etc can Relay handle low power/volt?