IR Remote Control Extender Circuit (Mark 2)
The improved IR remote control extender circuit is designed to enhance the functionality of standard infrared remote controls by extending their operational range and improving reliability in various lighting conditions. The circuit typically consists of a photodiode or phototransistor that detects infrared signals emitted from a remote control device. The output from the photodetector is then processed by an amplifier circuit to ensure that the signal is strong enough to be transmitted to the controlled device.
Key components of the circuit may include a low-noise operational amplifier to boost the photodetector signal, a bandpass filter to isolate the 36-38kHz carrier frequency, and a microcontroller or logic circuit for signal decoding. The use of a bandpass filter is crucial as it allows the circuit to selectively respond to the desired frequency while rejecting noise from other sources, thereby enhancing noise immunity.
The design also incorporates measures to mitigate interference from ambient light, which can affect the performance of infrared communication. This may include the use of shielding or specific circuit configurations that allow the system to differentiate between actual remote control signals and background infrared noise.
The range of approximately 7 meters is achieved through careful selection of components and circuit configuration, ensuring that the extender can effectively receive and retransmit signals over this distance. The circuit's compatibility with a wide range of domestic devices makes it a versatile solution for extending remote control functionality. However, it is important to note the limitation regarding compatibility with satellite receivers operating at a 115kHz carrier frequency, as these devices require a different approach for signal processing.
Overall, this IR remote control extender circuit represents a significant advancement in remote control technology, enhancing usability in home entertainment systems and other infrared-controlled devices.This is an improved IR remote control extender circuit. It has high noise immunity, is resistant to ambient and reflected light and has an increased range from remote control to the extender circuit of about 7 meters. It should work with any domestic apparatus that use 36-38kHz for the IR carrier frequency. Please note that this is NOT compatible with some satellite receivers that use 115KHz as a carrier frequency.
🔗 External reference
Related Circuits
The dual-channel circuit features the LM378 dual operational amplifier and operates with a supply voltage of 24V, supporting an 8-ohm load (or 16 ohms). Each channel delivers an output power of 4W. The circuit includes internal current limiting and...
In this circuit, the 555 Timer IC is configured as an astable multivibrator, and a 12-volt relay is operated through pin 3 of the IC. The IC generates continuous pulses at pin 3, which activate and deactivate the relay,...
The rewiring of an entire house is underway following a significant malfunction of two antique knob and tube circuits. A challenge has arisen with the outdoor lighting setup, specifically concerning a detached garage that features a porch light above...
Another JYB type liquid level controller internal circuit is shown. This circuit employs a Schmitt trigger configuration, enhancing the reliability of the action level controller. The JYB type liquid level controller utilizes a Schmitt trigger circuit composed of transistors VT2...
This transverter utilizes the bilateral properties of a balanced mixer to generate a 6-meter output from 2-meter inputs. The component Y1 is a 90-MHz crystal. It is important to note that the input frequency on the 2-meter band is...
This tracking transmitter consists of four distinct subassemblies: a free-running multivibrator, a transmit switch, an audio-tone generator, and an FM transmitter. The multivibrator, which produces a pulse width with a pulse separation of 1500 ms, is built around Q1...