Circuit board

The utility model discloses a circuit board relates to circuit board technical field, and the main objective makes on the veneer air regulation in sparse region of device and the intensive region of device more convenient to reach the radiating effect that improves circuit board and go up the device. The utility model discloses a main technical scheme does: this kind of circuit board includes circuit board body and windage adjusting device, and the circuit board body has the sparse region of device, and windage adjusting device includes detecting element for detect the wind speed value in device rarefaction territory, adjustment mechanism sets up in the circuit board body and lies in the sparse region of device for adjust the windage in device rarefaction territory, the control unit is connected with detecting element and adjustment mechanism respectively for receipt wind speed value, and judge when the wind speed value is greater than the default that control adjustment mechanism increases the windage in the