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DIY Kit 8x8 Audio Indicator Red Blue Green Yellow Mixture FFT Voice Frequency

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8x8 Red Blue Green Yellow Audio Indicator

1. Introduce.
   1>. Working voltage: 5V.
   2>. PCB size: 75*45mm.
   3>. There are four fixed mounting holes on PCB.
   4>. It is no need for filter circuit. It can driver dot matrix, spectrum indicating and so on.
   5>. We have programmed the code to FFT2088.It can supply 8*8 LED.
   6>. It design for audio equipment. Being used in all kinds of audio output device widely.
   7>. Professional audio decoding. It can display equency and amplitude for audio signal.
   8>. There are three display mode can be selected(Fast flash, Slow flash 1,Slow flash 2).Provide the feeling of cool.
   9>. There are three Sensitivity mode can be selected(High,Medium,Low).To adapt to the different power supply environment.
   10>. Audio automatic gain control. Always show the best visual effect.
   11>. Circuit design is simple. Add current limiting resistor drive LEDs directly.
2. Function declaration.
   Function Menu selection by a button. It has three different operations as following:
   1>. Test Mode.
   Press button before power on, then power on, IC will enter into test mode automatically. In this mode, it can test led and circuit.
   2>. Change Display Mode. ( press the button less than 1.5 seconds)
It will change a display mode by short press one time button(less than 1.5 seconds).
      1). S1 Mode: slow flash 1. It will display "S1" on LED screen. In this mode, It's the slowest display and update.
      2). S2 Mode: slow flash 2. It will display "S2" on LED screen. In this mode, Its speed is appropriate.
      3). F Mode: fast flash. It will display "F" on LED screen. In this mode, It's the fastest display and update.
   3>. Sensitivity Mode. ( press the button more than 1.5 seconds)
It will change signal detection sensitivity by long press one time button(more than 1.5 seconds).
      1). L Mode: low sensitivity mode. It will display "L" on LED screen. In this mode, It can filter weak jamming signal, It is not sensitive to the interference of power supply.
      2). M Mode: medium sensitivity mode. It will display "M" on LED screen. In this mode, It can filter the weaker jamming signal, Signal detection sensitivity.
      3). H Mode: high sensitivity mode. It will display "H" on LED screen. In this mode, It can filter the weaker jamming signal, It is sensitive to the interference of power supply.
3. Component listing.















330k ohm




1K ohm


Capacitance SMD


10uf 106


Capacitance SMD


0.1uf 104


IC FFT2088








Blue LED




Green LED




Yellow LED








Audio socket


3.5mm SMD


DC power socket


3.5mm SMD






   NOTE 1: This kit has 64pcs LEDs, user can weld LED on any solder joints for D1 to D64. but we will recommended user make one row or column in the same LED.
4.Effect picture

5.Installtion Manaul


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DIY Kit 8x8 Audio Indicator Red Blue Green Yellow Mixture FFT Voice Frequency