Computer headlight luminance automatic control circuit that makes a video recording

• Main Author: XIA DIANYA
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

The utility model discloses a computer headlight luminance automatic control circuit that makes a video recording, including power supply circuit, camera light filling lamp circuit, signal amplification drive circuit, regulating circuit and photosensitive circuit, power supply circuit simultaneously with camera light filling lamp circuit, signal amplification drive circuit the regulating circuit with sensitization circuit connection, the signal output part of photosensitive circuit loops through the regulating circuit with signal amplification drive circuit with camera light filling lamp circuit connection. Compared with the prior art, the utility model discloses a photosensitive resistance detection light intensity, through potentiometre manual regulation luminance range, first triode of rethread and second triode transmit to emitting diode after with the signal amplification, and light is strong more, then transmits to emitting diode's electric current greatly more, and luminance is high more, on the contrary then luminance is low more, until closing to reach automatic control's effect, convenient to use has the value of popularization and application.