Spectrum light +1501176A

This spectrum lamp is completed but not completely completed because the ADC part of collecting audio signals has not been completed yet. At present, the MCU is only used to transmit data to TA6932, and finally the analog audio signal is displayed in a dot matrix, which is not actually the effect of the audio signal. There is no welding on the download circuit part because I used CH340G on other MCUs to program this RA microcontroller. As for driving the dot matrix display, when designing the circuit, we considered that the TA6932 may not be able to provide large current to the two LED dot matrix, so a PNP tube was added to each channel. However, during the test, it was found that the segment selection port of the 6932 is a P-tube open-drain output and cannot output a low level, so the segment selection port of the 6932 was simply connected directly to the anode of the LED dot matrix. After testing, it was found that the TA6932 could drive two LEDs without any effort. Dot matrix, so the PNP tube can be removed. As for the audio collection and the subsequent Fourier transform, I will wait until I learn some more knowledge before I can continue to improve this project.