The utility model discloses a showcase projection lamp capable of switching
color temperature, which relates to the technical field of showcase projection lamps and comprises a + 5V power adapter, a touch key KEY1, a VDD
voltage, a
software downloading port JP1 and a
single chip microcomputer U1, and an
overvoltage protection
resistor R2, a
resistor R3, a
voltage stabilizing
diode ZD1, a
triode Q2, a
resistor R4, a
capacitor C3 and a
triode Q1 are arranged at the input end of the VDD
voltage. According to the showcase capable of switching the
color temperature, the lamp is projected, the touch control is performed for the first time, the lamp is lighted, the
color temperature of the lamp is 3000K, the brightness is 100%, the touch control is performed for the second time, the lamp is lighted, the color temperature of the lamp is 3000K, the brightness is 50%, the touch control is performed for the third time, the lamp is lighted, the color temperature of the lamp is 6500K, the brightness is 100%, the touch control is performed for the fourth time, and the lamp is turned off in sequence, so that different
customer requirements are met through a single touch key; the projection lamp color temperature can be switched, and meanwhile, a
software downloading port JP1 can be convenient for personnel to refresh programs of different versions.