How to connect the three wires of GND, VCC and Vout to BNC or XLR port?

caihuanchen512

How to connect the three wires of GND, VCC and Vout to BNC or XLR port? [Copy link]

I made a contact microphone (piezoelectric sensor + amplifier), the three wires are GND (shielded (woven)), VCC (+5V), Vout. 1. How to connect to the BNC connector. The video cable connected to the BNC connector is divided into positive and negative poles, so where should the GND ground wire be connected? Or is there no need for a ground wire? 2. Or how to connect to the XLR port. I am completely new to line cables, please help me, I will try to solder it.

qwqwqw2088

The BNC connector is a coaxial cable that is connected. The shielding layer is on the outside and the core is connected inside. You will understand it when you see the BN head. Pin 1 of the Canon port is connected to the shielded network cable and the shell (shielded wire), pin 2 is connected to the red wire (signal wire), and pin 3 is connected to the white wire (ground wire).

chunyang

Standard BNC has only two wires, the core wire and the shield, and is mostly used to connect coaxial cables. In principle, it uses single-ended signals, and differential signals should use other appropriate connectors. There is a two-core wire or three-wire interface developed from BNC, called Tri-BNC, also known as TRB, but this connector is expensive and rarely used. Note that the two names cannot be confused, and BNC must be single-core.

chunyang

Cannon interface is an audio device connector mainly used for MIC. It has two-wire, three-wire, four-wire and other specifications. Its standard is not very strict. Common three-wire Cannon connection method: For the male plug, the head faces itself and the middle line is at the bottom. At this time, the left side is Pin1, defined as ground, ground wire. The right side is Pin2, defined as hot, connected to power or signal +. The middle pin is Pin3, defined as cold, connected to signal output or signal -. For the female plug, in the same direction, the above 1 and 2 are interchangeable.

chunyang

If using Tri-BNC, the innermost pin is the hot end, the middle layer is the cold end, and the outermost is the ground.