Adjustable cold light source and visual ear picking device

Abstract

The utility model relates to a kind of adjustable cold light source and visual ear collecting equipment, belong to light source control technical field.The adjustable cold light source is with precision adjustable digital potentiometer cooperation upper resistance to constitute voltage feedback branch, and the precision adjustable digital potentiometer in it is controlled by single-chip microcontroller, the output resistance of precision adjustable digital potentiometer is accurately regulated by single-chip microcontroller, and the feedback voltage size that voltage feedback branch is output to light source voltage drop conversion branch, to change the power supply voltage size that light source voltage drop conversion branch provides for light emitting diode, not only can accurately control the brightness of the adjustable cold light source in light emitting diode, but also can determine light source opening-closing time and current state by the control instruction issued by single-chip microcontroller, realize the intelligent, fine adjustment of light emitting diode.

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