Simple Remote Controlled Curtain Open/Close Circuit

In this article I will explain a simple curtain controller circuit designed by me which can be used to control the opening and closing of a curtain through a remote control.

Overview

Referring to the circuit diagram in your screen, we can see there are just two relays employed for implementing a remote controlled opening and closing of a curtain.

The best feature of this circuit is that it does depend on any limit switches at the start and the end of the curtain mechanism.

The curtain can be moved in a forward closing direction, or in the reverse opening direction, simply by pressing the relevant push button switches of the remote handset.

The curtain keeps moving as long as the user keeps the relevant remote handset button pressed and stops as soon as the push button is released.

Since there are no limit switches used in this design, it is important that the user releases the push button and stops the motor whenever the curtain reaches its extreme ends, just to ensure that the motor is not unnecessarily overloaded.

How the Circuit Works

If you do not want to read the whole explanation, you can watch the following video instead:

Now let's understand how the circuit is designed to work.

In this design we have used a standard 2 channel, RF 433 Mega-Hertz remote control module, in which the receiver module contains two SPDT relays and the remote handset contains two push buttons. An example model of the remote control units is shown in the following image.

The two push buttons on the remote handset control the operation of the two relays on the receiver unit.

In our circuit diagram, on the left side we can see the two SPDT relays of the remote control receiver module. The N-O contacts of the two relays are connected to +12 volt DC supply. The common pole of the two relays are used to supply +12 Volt DC to the motor control relays of the system which consists of one SPDT relay and one DPDT relay.

Using a network of 3 1N4007 diodes, the switching supply from the two SPDT relays are arranged such that one of the remote receiver relays operate both the SPDT and the DPDT relays together, while the other remote relay operates only the SPDT relay of the system.

The DPDT relay basically controls the reverse-forward motion of the curtain motor, while the SPDT relay is used for toggling the +12 volt to the motor.

Overall, the system ensures that the curtain motor can be operated suitably by pressing the relevant remote control buttons either to move the control towards the closing end of the mechanism or the opening end of the mechanism.

The system also allows the motor to curtain to move and stop at any desired point of its travel, which means that you can open or close the curtain at 10%, 20%, 50%, 70% or at any other desired range.

So, that's it friends, this concludes our article on a simple remote controlled, curtain open-close circuit. If you have any related questions or doubts, please feel free to use the comment box below to ask them.