On-off Infrared Remote Control

Most homes today have at least a few infrared remote controls, whether for the television, video recorder, stereo, etc. However, many people have experienced frustration when the light remains lit after settling down in a comfortable chair to watch a film. This project proposes a solution with its innovative app. It is designed as a common on/off switch for infrared remote controls, but what sets it apart from commercial products is its ability to work with any remote control. Thus, the first remote found can be used to turn off the light and enhance the movie-watching experience. The infrared receiver component of this project utilizes an integrated receiver (Sony SBX 1620-52), which is more cost-effective than the components needed to create the same functionality. After being inverted by T1, the pulses from this receiver trigger IC2a, which is a D flip-flop configured in monostable mode by feeding back its output Q to its reset input via R4 and C3. The pulse generated at the output Q of IC2A causes IC2B to change state, which in turn activates or deactivates the LED in IC3. This circuit is an opto triac with zero-crossing detection, allowing for silent switching. It triggers triac T2, where the load is connected. The chosen model can switch up to 3 amperes, but a more powerful triac can be used if needed. To minimize size and cost, the circuit is powered directly from the mains using capacitor C5, which must be a class X or X2 model rated at 230 volts AC. This type of capacitor, known as "self-healing," is essential for power supplies connected to ground. Traditional capacitors rated at 400 volts do not provide adequate safety in this context. Given that the setup connects directly to the mains, it must be housed in a completely insulated enclosure. A power outlet model is suitable for this purpose and can easily connect between a grounded wall outlet and the remote control device. This setup responds to any infrared signal, making it compatible with any remote control. However, it may occasionally react to normal usage of these remotes, which could be undesirable. To mitigate this, it is advised to partially cover the infrared receiver window, ensuring that the remote control must be pointed directly at it to activate the circuit.

The proposed circuit operates as a universal infrared remote control switch, effectively addressing the common issue of unwanted lighting during movie viewing. The integration of the Sony SBX 1620-52 receiver allows the circuit to detect infrared signals from any remote control, enhancing user convenience. The D flip-flop (IC2A) is configured in monostable mode to create a temporary pulse that triggers the triac (T2) via the opto triac (IC3), facilitating silent switching without the typical noise associated with mechanical relays.

The triac selected for this application is capable of handling a load of up to 3 amperes, making it suitable for controlling various household appliances. For applications requiring higher current ratings, a more robust triac can be incorporated without significant redesign of the circuit. The power supply design, utilizing a class X or X2 capacitor, ensures compliance with safety standards, particularly in applications where the circuit is connected to the mains. The self-healing properties of these capacitors provide an added layer of safety, reducing the risk of failure.

The housing for the circuit must be insulated to prevent electrical hazards, and using a power outlet model facilitates easy integration into existing electrical systems. The advice to mask the infrared receiver window is crucial for preventing accidental activation, ensuring that the setup only responds to intentional commands from the remote control.

In conclusion, this project presents a practical solution for controlling lighting in a home theater environment, combining affordability, safety, and ease of use. The ability to work with any infrared remote control makes it a versatile addition to modern home electronics.Most homes today have at least a few infrared remote controls, whether they be for the television, the video recorder, the stereo, etc. Despite that fact, who among us has not cursed the light that remained lit after we just sat down in a comfortable chair to watch a good film This project proposes to solve that problem thanks to its original app

roach. In fact, it is for a common on/off switch for infrared remote controls, but what differentiates it from the commercial products is the fact that it is capable of working with any remote control. Therefore, the first one you find allows you to turn off the light and enjoy your movie in the best possible conditions.

The infrared receiver part of our project is entrusted to an integrated receiver (Sony SBX 1620-52) which has the advantage of costing less than the components required to make the same function. After being inverted by T1, the pulses delivered by this receiver trigger IC2a, which is nothing other than a D flip-flop configured in monostable mode by feeding back its output Q on its reset input via R4 and C3.

The pulse that is produced on the output Q of IC. 2A makes IC. 2B change state, which has the effect of turning on or turning off the LED contained in IC3. This circuit is an opto triac with zero-crossing detection which allows our setup to accomplish switching without noise. It actually triggers the triac T2 in the anode where the load to be controlled is found. The selected model allows us to switch up to 3 amperes but nothing should stop you from using a more powerful triac if this model turns out to be insufficient for your use.

In order to reduce its size and total cost, the circuit is powered directly from the mains using capacitor C5 which must be a class X or X2 model rated at 230 volts AC. This type of capacitor, called self-healing`, is the only type we should use today for power supplies that are connected to ground.

Traditional` capacitors, rated at 400 volts, do not really have sufficient safety guarantees in this area. Considering the fact that the setup is connected directly to the mains, it must be mounted in a completely insulated housing.

A power outlet model works very well and can easily be used to inter-space between the grounded wall outlet and that of the remote control device. Based on this principle, this setup reacts to any infrared signal and, as we said before, this makes it compatible with any remote control.

On the other hand, it has a small disadvantage which is that sometimes it might react to the normal` utilization of one of these, which could be undesirable. To avoid that, we advise you to mask the infrared receiver window as much as possible so that it is necessary to point the remote control in its direction in order to activate it.

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