sliding door

Thread Starter

Kaiser Ed Bayawa

Joined Mar 19, 2015
64
hi.. I am making a simple automatic sliding door with an LDR sensor and a triac to drive the motor.
the problem is when the door is open i dont have an idea to close it. what will i do to reverse the polarity of the motor?
 

bertus

Joined Apr 5, 2008
20,180
Hello,

What kind of motor do you use?
Also keep in mind that you block the movement of the door when there is something in the doorway.

Bertus
 

MaxHeadRoom

Joined Jul 18, 2013
19,442
You can also drive a servo motor with plain DC which is reversed by contactor or relay.
PWM is if you require rpm control.
This is assuming it is not a simple RC servo but an industrial one?
Max.
 
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