Digital Super Bass Processor M51134P

What is super bass? People who have not been in contact with real subwoofers often mistakenly believe that the general audio system must be able to emit subwoofers. In fact, even if real subwoofers exist, it is not easy to hear, because we hear that the shocking bass is only about 200Hz. Bass, true subwoofer refers to audio with a frequency lower than 100Hz, such as the sound of a helicopter propeller, the vibration sound produced when exploding ... These sounds you will feel a vibration that does not seem to belong to the sound, this is super subwoofer, if You only turn on the subwoofer for the entire system. Perhaps you will feel that it is just a vibration that does not belong to the sound. But when watching movie feature films, especially some intense plots, fierce battles and fighting films, if there is no publicity of the subwoofer, the realistic shock of the scene will not be able to truly reproduce, and it lacks the appeal of the soulless soul. Importance.

M5114P is a special subwoofer detection and strengthening circuit specially developed by Mitsubishi Corporation for AV video and audio system. The IC adopts a 20-pin dual in-line package, which includes: frequency detection, regulator, level detection, low-pass filter op amp, VCA voltage controlled amplifier, etc. The working principle is to use digital filtering to detect the level of low-frequency components in the input signal, strengthen the corresponding low-frequency components and perform low-frequency dynamic expansion (completed by the voltage-controlled amplifier), from which it can be seen that its working principle is similar to general low-pass filtering The subwoofer enhancement circuit in the form of a speaker is different. The subwoofer signal provided by the general low-pass filter circuit is soft and weak, and the subwoofer effect provided by the M51134P has a strong sense of shock, especially thunder, gunfire, The advantages of explosion sound are particularly obvious. In addition, the M51134P only detects signals lower than 120Hz. If there is no component lower than 120Hz in the input signal, the circuit has no output. This should be noted in use.

The working voltage of M51134P is 7-18V (type value 12V), and the output noise is low (-93dBV). Figure 1 is an application circuit designed by the author according to its application data. In actual application, it can work by connecting a transformer of 5W or more and secondary 12V or more. Figure 2 is a connection scheme for making a subwoofer. Large and powerful, the cabinet must be strong, and the plate must be thick to obtain the effect. The shape and size of the cabinet are designed according to personal preferences). Limited by the layout, the audio-visual effects such as the shock of the super-bass, the appeal of the gastrointestinal let the enthusiasts practice it and feel it!

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Photocell Timer


24HR Electronic Timer socket with photocell.

â‘  Light intensity setting

â‘¡ Light intensity detection

â‘¢ Countdown Timer ON & OFF

â‘£ 4 MODES:

Set > Detected: When the light intensity detection value is less than the set value, switch ON or OFF.

Detected > Set: When the light intensity detection value is greater than the set value, switch ON or OFF

ON : Always ON

OFF : Always OFF

NOTED:

1. The light intensity displayed by this machine is not the standard light intensity value (Lux), only the relative light intensity value.

2. The light intensity value is affected by the placement position and direction. Please determine the position first and then set it according to the actual light intensity detected. If you change the position or change the orientation, you need to reset the light intensity setting value suitable for the new position.

3. This product has built-in rechargeable battery. If it is not connected to AC for a long time, you need to connect the power supply to charge until the LCD can display normally.

MANUAL OPERATION

1. Press [UP" or [DOWN" to set the LUX value.

2. Press the [SET" key to start setting, and the P1 settable items will be flashed.

3. Press [UP" or [DOWN" to adjust the value.

4. Press [SET" key again to exit setting or enter next setting for countdown timer.

5. Repeat the [SET" key to start setting, and the P2 & P3 settable items will be flashed.

6. Press the [FUN" key to switch the working state in the following:

Set > Detected -> Detected > Set -> ON -> OFF

Set > Detected: Automatically switches when the detected ambient light intensity is darker than the set value

Detected >Set: Automatically switch when the detected ambient light intensity is brighter than the set value

When the brightness meets the setting conditions, the countdown starts as below:

Note:when the countdown is ON, the detected value is not displayed.

When the brightness does not meet the setting conditions, the countdown stops and waits:


After the countdown ON is reduced to 0, the countdown OFF starts immediately and the power is OFF.


After the countdown OFF is reduced to 0:

A. If the light intensity meets the set conditions, a new round of countdown will be started;


B. If the light intensity does not meet the set conditions, keep the power off and wait for the light to meet the conditions before turning on automatically.

NOTE:

1. If the power is cut off while the countdown is running, the countdown will be terminated immediately and the relay output will be off. After the power is turned on again, a new round of brightness detection will start.

2. Modifying the brightness value in the countdown operation will not affect the current countdown operation. After the off time of the current countdown, the new brightness setting value will take effect.

3. In the countdown on operation, change the setting value of the countdown on, this countdown will still be timed according to the original setting value; the new setting value will take effect when the next countdown on starts.


4. In the countdown off operation, change the setting value of countdown off, this countdown will still be timed according to the original setting value; the new setting value will take effect when the next countdown off is started.

NOTE: the brightness setting value, countdown ON or countdown OFF, any one of which is equal to 0, cannot be switched ON or OFF automatically.

Manual Control


When ON or OFF is displayed, it means that the power supply remains ON or OFF, as shown in the figure below:


Power Detection and Standby Mode


With AC power supply, the icon lights up and works normally.


When there is no AC power supply, the icon goes out, the brightness is not detected at this time, and the system enters the standby mode.



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