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Editorial Team
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Asked: 2026-06-10T05:48:53+00:00

So I just got me LED matrix in the mail and im trying to

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So I just got me LED matrix in the mail and im trying to upload the code from this instructable http://www.instructables.com/id/Arduino-Processing-Audio-Spectrum-Analyzer/?ALLSTEPS but I keep getting the errors

ArduinoCode:2: error: 'ht1632c' does not name a type
ArduinoCode.cpp: In function 'void setup()':
ArduinoCode:11: error: 'dotmatrix' was not declared in this scope
ArduinoCode.cpp: In function 'void loop()':
ArduinoCode:35: error: 'dotmatrix' was not declared in this scope
ArduinoCode:35: error: 'BLACK' was not declared in this scope
ArduinoCode:41: error: 'GREEN' was not declared in this scope
ArduinoCode:107: error: 'ORANGE' was not declared in this scope
ArduinoCode:131: error: 'RED' was not declared in this scope
ArduinoCode:153: error: 'dotmatrix' was not declared in this scope

The code is http://www.instructables.com/files/orig/FSH/KZKA/GZ0BVJOC/FSHKZKAGZ0BVJOC.ino Because I still have no clue how to post code here

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1 Answer

  1. Editorial Team

    You are getting this error message because you don’t have the file (which is included from your program) in the libraries folder.

    In the instructables that you mentioned they have an attachment called libary.zip file. Download and extract the zip file and copy the contents into the arduino libraries folder. Once you do it your code should compile properly.

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