Zerodis Audio Spectrum Analyzer, DIY Dual 12 Level Audio Level Indicator Adjustable Stereo Music Spectrum Display Board for Musicians and Audio Enthusiasts

Statement:

• The V1.2 version software adjusts the previous real-time mode to a professional DB mode, which can be installed in professional related equipment for signal monitoring purposes. The audio amplitude range is -40dB to +9dB, which has professional reference significance.
• For some users that the level of light sensitivity, please complete the user welding test the first thing must press the button for 10 seconds to restore a factory settings!
• The page picture is very clear! Because the program burned into the chip is not in the initial working state, you must restore the factory settings after the level lights are in normal working condition!
• Sensitivity of the user feel the problem is to restore their own factory settings! .As long as done this operation, there will be no sensitivity problems, and the level of light sensitivity than we imagined much better! In particular, the signal automatic gain control range is very wide!
• The data will be saved automatically every 5 seconds after the setting is changed. The data will be extinguished all the time when the data is saved, and the data will be saved several times because the factory data will be saved for the first time. Power or make other settings and operations! If the power is changed immediately after the change, the changed data will not be saved. Please know!
• Ultra-small size stereo level lights, light bar can be adjusted to rise, the rate of decline and top lamp residence time, the rate of decline. Each lamp set up a separate current limiting resistor, Ensure the same brightness of the different color lights ,Signal input through the op-amp isolation,Avoid single-chip high frequency interference AUDIO.
• The MCU samples at the sampling time, so that the simultaneous input signals of the two channels change rapidly, and the amplitudes of the two light bars may be different, which is normal.
• In extreme cases, there may be very slight high frequency noise. It is recommended to replace the signal input head position with a two-core shielded cable.

Note

• 1. Dual 12 level music screen level ultra-small-size stereo level light, which can freely adjust the rise and fall speed of the light bar and the stop time and descent speed of the top lamp. Each lamp is separately provided with a current limiting resistor to ensure the brightness of the lamps of different colors is consistent, and to ensure that there is no light and dark change in the case where the lamp is much brighter. The signal input is isolated by the op amp to prevent the high frequency interference of the MCU from being inserted into the audio.
• 2. Classic color matching: 7 green + 2 orange + 3 red
• 3. The single-chip microcomputer uses time-sharing sampling, there may be two channels connected in parallel with the same signal, the amplitude of the two light bars may be different.
• 4. In very extreme cases, there may be very slight high frequency noise. Please pay attention to the power supply separately, and try to replace the lamp input line with the shield wire.