Brown is positive, black is negative. Or socket center is positive, socket side is negative.
Two, dc low-voltage power plug typical connection
The typical connection of dc low-voltage power plug is the outer shell to ground, the inner core connected to the power input. As for that end of the positive pole negative pole! Is determined by the device circuit, the vast majority of current circuits are based on NPN polarity components of the main circuit! The circuit is to the power supply negative for the public **** grounded, so these electrical equipment DC interface is to the negative for the ground, so the power plug jacket should be connected to the power supply negative! The inner core is connected to the positive terminal.
Three, DC socket applications
1. audio-visual products: MP3, MP4, DVD, audio;
2. digital products: digital cameras, digital video cameras, etc.;
3. remote control: vehicles, point roll-up door, the remote control of the home burglary products;
4. communication products: cell phones, car phones, telephone, building Communication products: mobile phones, car phone, telephone, building equipment, PDA, etc.;
5. Home appliances: television, microwave ovens, rice cookers, electric wind, electronic body scales, electronic fat scales, electronic kitchen scales, etc.;
6. Security products: visual intercom, monitors, etc.
7. Toys: electronic toys, etc.;
8. Computer products: cameras, voice recorders, etc.;
9. Fitness equipment: running machines, massage chairs, etc.
10. Medical equipment: blood pressure monitors, thermometers, hospital call systems, etc.