What is the use of negative pressure power supply output negative pressure
Most analog amplifiers have negative voltage, and some digital circuits also use negative voltage. The amount of negative voltage, multimeter hit DC voltage DC block, red pen on the ground, black pen on the negative voltage can be measured.
It depends on how you use it! General amplifier circuit used more. Digital display direct measurement, black pen then the public, red pen were positive and negative ends. When the negative value is displayed, the "-" sign is displayed at the front of the header. When the pointer is connected to the same value, the red pen is connected to the common terminal.
It depends on how you use it! General amplifier circuit used more.
