Raspberry pi-based brightness adjusting circuit

The utility model relates to a raspberry pi-based brightness adjusting circuit. The raspberry pi-based brightness adjusting circuit includes a light measuring sensor, an analog-to-digital converter, a raspberry pi computer and a PMW signal output end; the light measuring sensor is connected with the raspberry pi computer through the analog-to-digital converter; the raspberry pi computer is connected with the PMW signal output end; the raspberry pi computer comprises a central processing unit, as well as a memory, an SD card, a network port and a USB interface which are respectively connected with the central processing unit, wherein the central processing unit is connected with the light measuring sensor through the analog-to-digital converter. Compared with the prior art, the raspberry pi-based brightness adjusting circuit of the utility model has the advantages of simple structure, powerful function, convenient operation and high security.