Go Down

Topic: Best Normally Closed switch for Arduino control? (Read 1 time) previous topic - next topic

SparksAlot


I would like to control a 12V 250mA light using the Arduino.

But I want the light to remain lit if the Arduino is off or in the middle of a reset.

So I need a controllable switch that is normally closed.


Thanks for any help!

Grumpy_Mike

Quote
So I need a controllable switch that is normally closed.

I think you mean a relay, most relays have normally open and normally closed contacts. You will have to drive the relay with a transistor and put a diode across the coil.
See:-
http://www.thebox.myzen.co.uk/Workshop/Motors_1.html

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy