I also bought an OLED from Wannengdi Taobao, but I didn’t receive it during the Labor Day holiday, but I did receive it at work.
I turned it on at night and liked it so much that I wanted to light it
Keysight Technologies N9020A 3.6G Spectrum Analyzer Special Price: 8500/unit
The full-band indicators have been calibrated and the accuracy is guaranteed to be within 0.3dBm.
Functions include: phase
I used a four-pin photosensor.Different models of STM32 have different ADC channel selections.I used the STM32F103RCT6 microcontroller and selected ADC2 channel 6, which corresponds to the PA6 pin.I h