6E2 Magic Eye Electron Tube Driver Board Kits VU Meter Audio Volume Level Indicator DIY
Description:
Notice: This is kits, Need solder by yourself.
The 6E2 electron tube driver board can make the screen light column of the 6E2 tube flash with the strength of the audio signal. The luminous area of the screen is proportional to the strength of the signal. The luminous area is the smallest when there is no signal. When there is a strong signal, the upper and lower light bands expand from both ends to the center until they overlap. Under the excitation of the alternating signal, the green electric eye screen of the 6E2 tube changes with the signal, just like the eyes of a cat.
This driver board adds a primary amplifier circuit on the basis of the old circuit to improve the input sensitivity. The impedance of the input device is 200K, reducing the impact on the original circuit after the connection. The precision adjustable resistance on the board can adjust the input level. It is suitable for a variety of signal options, and can be connected to the audio signal output of the previous stage or the speaker output of the power amplifier. There is also a precision adjustable resistor on the board, which can adjust the opening and closing scale of the light band, so that the left and right sound channels can indicate symmetrically.
Features:
Working Voltage: DC 220V-250V 4mA ; AC/DC 6.3V 0.3A (Pay attention to polarity when using DC, otherwise the LED will not work or burn)
Board Size: 68x35mm (L*W)
"IN" is the Audio signal input interface
Driver Board Adjustment Method:
W1 is the input sensitivity adjustment. The sensitivity is enhanced by clockwise adjustment, and the response is more sensitive when the volume is low.
W2 is the screen opening amplitude adjustment, clockwise adjustment reduces the opening amplitude and tends to close.
Please adjust W2 after the power supply has been preheated for 20 minutes. Adjust W2 according to the routine, so that about 5mm is reserved on the display surface of the 6E2 tube.
W1 and W2 are precision adjustable resistors that can be adjusted for up to 10 turns and make a slight click sound when adjusted to the end.
Packing List:
1set x 6E2 Magic Eye Electron Tube Driver Board Kits