Opamp and cmos integrated circuits based on sound level indicator audio spectrum analyzer circuit led bar display used 10 pieces for a little advanced version of the classic spectrum analyzer, VU meter circuit circuit circuit diagram a bit complicated but it is written makes it easy for you to work more or less pcb drawings
Audio Spectrum Analyzer Project
The audio spectrum analyzer was made and operated stably, meets requirements for professional audio spectrum analyzer. However, display is not showed the sense of beauty because using LEDs, if we use LCD display matrix, it will make better result.
If we combine the audio spectrumanalyzer with a tone equalizers, we will have a Graphic Equalizer. This equipment is used commonly in medium rank to high rank audio systems. The combination of the two circuits is also the development for this project and finally the author hopes this is a useful document for who interesting in this project.
LED Bar Indicator Audio Spectrum Analyzer project files
STK400-290 Tone Controlled Amplifier Circuit (audio effected)
STK400-290 Amplifier Material values in the circuit diagram is not selected, but so what values are read in the PCB top view of a beautiful design
Amplifier based on the tone control circuit STK400-290 and effects created with the NE5532 op 4558
STK400-290 Amplifier Project
PCB gerber File needed
Hello,
Sorry, only PCB drawing in PDF format is available. You can copy PCB from the image with Sprint layout 6 program. 43:01 Re drawing a PCB using scanned copies. Copying PCB from image https://youtu.be/fZTVt6YmVMM?si=q8Camt28UmL2hClm&t=2581