Fan speed control circuit for cooling cameras

The utility model discloses a fan speed control circuit for cooling cameras. The circuit comprises an MOS (metal oxide semiconductor) transistor, a first divider resistor used for providing proper voltage to a gate of the MOS transistor and a capacitor serially connected between the gate and a sourc...

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Bibliographische Detailangaben
Hauptverfasser:	CHU XUEJUN, SUI SHOUXIN, LIU YANG
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS PICTORIAL COMMUNICATION, e.g. TELEVISION POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses a fan speed control circuit for cooling cameras. The circuit comprises an MOS (metal oxide semiconductor) transistor, a first divider resistor used for providing proper voltage to a gate of the MOS transistor and a capacitor serially connected between the gate and a source of the MOS transistor; a drain of the MOS transistor is connected with the cathode of a fan interface; the anode of the fan is connected with a 12V power supply, and multiple groups of filter capacitors are connected between the 12V power supply and the earth; a second divider resistor is serially connected between the earth and the cathode of the fan. The temperature in the cameras can be better controlled, good temperature equilibrium is provided for the cameras, and the problems of operation shutoff and the like due to overheating are prevented.