Multipurpose flashlight

A multipurpose flashlight comprising a barrel, said barrel comprising a front end, a rear end, and a rear cover covered on said rear end, a battery mounted inside said barrel, an ON/OFF switch and a selector switch mounted on said barrel for operation by hand, and a lamp head connected to the front end of said barrel and holding a lamp bulb, wherein the flashlight further comprises a controller installed in said barrel and adapted to regulate the intensity of light of said lamp bulb, said controller comprising a voltage control IC, a microprocessor, which obtains the necessary working voltage from said battery through said voltage control IC, an oscillator, which provides an oscillating frequency to said microprocessor, a PNP transistor, said PNP transistor having a base connected to an output end of said microprocessor through a current limit resistor, an emitter connected to the positive terminal of said battery through said voltage control IC, and a collector connected to the negative terminal of said battery through a resistor, a MOS field effect transistor, said MOS field effect transistor having a gate connected to the collector of said PNP transistor, a drain connected to the positive terminal of said lamp bulb and the positive terminal of said battery, and a source connected to the negative terminal of said battery to form a driving and amplifying circuit adapted to control the lightening of said lamp bulb, and a trigger switch connected to an input end of said microprocessor and adapted to drive said microprocessor to flash said lamp bulb, said trigger switch having a touch control interface disposed at the rear cover of said barrel;

• said selector switch is connected to an input end of said microprocessor and adapted to drive said microprocessor to regulate the intensity of light of said lamp bulb.