Motorised Infrared volume remote control
The circuit described is designed to facilitate remote control of audio preamplifiers or any circuit that utilizes a potentiometer. The key components include an infrared (IR) transmitter and receiver, along with the BA6418N motor controller chip, which allows for effective control of the potentiometer's position from a distance.
The IR transmitter can be powered by a 6V battery, typically achieved by connecting four AAA batteries in series. This power supply is sufficient to enable the transmission of IR signals over a reasonable distance, depending on the transmitter's design and the receiver's sensitivity.
The BA6418N chip is a versatile motor controller that can be configured to adjust the resistance of the potentiometer based on the received IR signals. The circuit should include proper interfacing between the BA6418N and the potentiometer, ensuring that the output from the motor controller can effectively adjust the potentiometer's wiper position.
To implement this circuit, a suitable IR LED must be selected for the transmitter, and a photodiode or phototransistor for the receiver. The design should ensure that the IR signals are modulated to minimize interference from ambient light sources, improving the reliability of the remote control functionality.
In addition to the basic components, it is advisable to include necessary protection features, such as diodes across the motor terminals to prevent back EMF from damaging the BA6418N. Proper decoupling capacitors should also be placed close to the power pins of the BA6418N to ensure stable operation.
Overall, this circuit provides a practical solution for remotely controlling audio preamplifiers and can be adapted for various applications involving potentiometers.A nice circuit for using with audio preamplifiers, or any other circuit that use potentiometer and you need to control it from distance. The circuit includes Infrared transmitter and reciever with motor controller chip BA6418N. You can use a 6V battery (4xAAA) for the transmitter. 🔗 External reference
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