DC Protection Time Delay for Loudspeaker circuit
The circuit design incorporates a relay (RL1) that serves as a switch for controlling the power supply to the amplifier. When the circuit is powered on, a timing mechanism initiates a one-second delay before RL1 closes, allowing the power supply capacitors to charge without introducing audible noise to the headphone output. This delay is critical in ensuring that transient noises do not interfere with the listening experience.
The resistor Rx is strategically placed to help manage the timing characteristics of the relay, ensuring that the delay is consistent and reliable. The choice of resistor value can be adjusted based on the specific requirements of the circuit, such as the charging time of the capacitors and the desired delay duration.
Simultaneously, the circuit includes a monitoring system that checks for the presence of DC voltage at the output of the amplifiers. This feature is essential for protecting the headphones and loudspeakers from potential damage caused by DC signals. If the monitoring system detects that the output is free of DC voltage, the relay activates, allowing the amplifiers to connect to the loudspeakers.
Overall, this circuit design effectively combines delay management and output monitoring to enhance the performance and reliability of audio amplification systems. The careful integration of components ensures that users experience a high-quality audio output without unwanted noise or distortion during startup.The particular circuit combines enough operations, as Smooth departure of benefit of AC line of network, with delay 1sec, to the transformers of power supply of amplifier, via the RL1 and the resistance Rx. (see block diagram). [ 2 ] Delay of connection of expenses of final amplifiers, in headphone, in order that noises emanating from the charge - uncharged of capacitors of power supply, they do not pass in them.
Simultaneously becomes control of exit of amplifiers for existence of continuous voltage [DC]. If all go well it connects, the amplifiers in loudspeaker.. 🔗 External reference
Related Circuits
The 555 timer generates a rapid series of pulses when switch SI is in the open position. These pulses are grouped into sets of 16 and converted into binary format by the 7493 counter. The binary output is then...
A crystal oscillator circuit is a straightforward oscillator circuit that can be easily understood through its schematic diagram. It serves as a replacement for a conventional oscillator network, which typically consists of an LC combination. This simplicity is also...
A simple music instrument/keyboard is created using a 555 timer chip circuit, a piece of paper, and a pencil. The project includes a more advanced automatic music player that utilizes a playing head and a long sheet of paper...
The SD1143 transistor offers a gain of approximately 14 dB in this circuit. Its design takes advantage of the fact that a 175-MHz device exhibits significantly higher gain when operated at lower frequencies. The amplifier was initially intended for...
This is my long history the device that controls my home's night light, air-conditioner, etc. The device is a Miniature Real-time Controller. The circuit uses only three chips, a 89C2051, DS275 (or MAX232), and 74LS07 open collector driver. The...
In certain locations near the reservoir or well, when the water level is constrained by the water towers, there is a need for simultaneous monitoring of the water towers and reservoirs as part of an automatic water control system....