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Audio Spectrum 16x3 Red/Green/Blue DIY Kit 1603 Level Indicator Voice Spectrum Lights DIY Voice Sound Module

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An audio indicator that bounces with music.


Parameter Value
Model SL-1603
Operating Voltage DC 5V
Operating Current 20-270mA
Standby Current <=5mA
Signal Input Way 3.5mm Audio Wire
Signal Choose Way Microphone first
LED Color 5mm red, green, blue
LED Array line 3, row 16
LED Brightness 16 level adjustable
Peak Keeping yes
PCB Size 158*34.8mm
PCB Mounting Hole 3mm
PCB Hole Distance 151.9*28.7mm
Note: LED should be the same color in one line/row

Component list:

NO. Name PCB Silk Screen Value QTY
1 Metal film resistor R3 10R 1
2 Metal film resistor RX1—RX16 100R 16
3 Metal film resistor R1.R2 1K 2
4 Metal film resistor R6.R8 10K 2
5 Metal film resistor R7 47K 1
6 Metal film resistor R4 330K 1
7 Metal film resistor R5 470K 1
8 Ceramic capacitor C2—C6 104P 5
9 Electrolytic capacitor C1 220uF 1
10 I.C U1 WD1603 1
11 Power SW S1 Self-locking switch 1
12 Switch cap S1 6*5mm 1
13 Triode Q1 S9014 1
14 Contact switch S2 6*6*13 1
15 Electret microphone MIC1 6050 1
16 Power input socket JK2 3.5MM 1
17 Audio input socket JK1 Stereo 5Pin 1
18 USB to DC Line —— 80CM 1
19 PCB —— 158mm*3.5mm 1
20 LED D11—D163 5mm Red 15
21 LED D11—D163 5mm Green 15
22 LED D11—D163 5mm Blue 15
23 Audio input line Free give 1.2M 1
24 One in two audio line Free give 22CM 1
25 PCB —— 165*35mm 1

Operation Method:
After the power is on, it enters the normal working state,Press and hold the"MODE"key and enter after 2 seconds to Mode selection.

Short press Content selection:
Breathing pattern: The 8 line LED lights up Short press “MODE” Key to Fixed mode
4 seconds without key operation, automatic exit Breathing pattern:
The stronger the audio signal, the brighter the LED Fixed mode:
Brightness adjustable .
There are 16 levels of brightness
Press and hold the"MODE"key.
Turn on the power into Test mode

Download the installation instructions here


Tested by ICStation's Outstanding Partner bzoli5706:

The led spectrum will display the colorful light which will follow your voice frequency:

Learn More Details in the Video:

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Audio Spectrum 16x3 Red/Green/Blue DIY Kit 1603 Level Indicator Voice Spectrum Lights DIY Voice Sound Module